Convert the iov_iter iteration macros to inline functions to make the code
easier to follow.
The functions are marked __always_inline as we don't want to end up with
indirect calls in the code. This, however, leaves dealing with ->copy_mc
in an awkard situation since the step function (memcpy_from_iter_mc())
needs to test the flag in the iterator, but isn't passed the iterator.
This will be dealt with in a follow-up patch.
The variable names in the per-type iterator functions have been harmonised
as much as possible and made clearer as to the variable purpose.
The iterator functions are also moved to a header file so that other
operations that need to scan over an iterator can be added. For instance,
the rbd driver could use this to scan a buffer to see if it is all zeros
and libceph could use this to generate a crc.
Signed-off-by: David Howells <dhowells@redhat.com>
Link: https://lore.kernel.org/r/3710261.1691764329@warthog.procyon.org.uk/ # v1
Link: https://lore.kernel.org/r/855.1692047347@warthog.procyon.org.uk/ # v2
Link: https://lore.kernel.org/r/20230816120741.534415-1-dhowells@redhat.com/ # v3
Link: https://lore.kernel.org/r/20230925120309.1731676-8-dhowells@redhat.com
cc: Alexander Viro <viro@zeniv.linux.org.uk>
cc: Jens Axboe <axboe@kernel.dk>
cc: Christoph Hellwig <hch@lst.de>
cc: Christian Brauner <christian@brauner.io>
cc: Matthew Wilcox <willy@infradead.org>
cc: Linus Torvalds <torvalds@linux-foundation.org>
cc: David Laight <David.Laight@ACULAB.COM>
cc: linux-block@vger.kernel.org
cc: linux-fsdevel@vger.kernel.org
cc: linux-mm@kvack.org
Signed-off-by: Christian Brauner <brauner@kernel.org>
Use the iterator type to determine whether an iterator is user-backed or
not rather than using a special flag for it. Now that ITER_UBUF and
ITER_IOVEC are 0 and 1, they can be checked with a single comparison.
Signed-off-by: David Howells <dhowells@redhat.com>
Link: https://lore.kernel.org/r/20230925120309.1731676-7-dhowells@redhat.com
cc: Alexander Viro <viro@zeniv.linux.org.uk>
cc: Jens Axboe <axboe@kernel.dk>
cc: Christoph Hellwig <hch@lst.de>
cc: Christian Brauner <christian@brauner.io>
cc: Matthew Wilcox <willy@infradead.org>
cc: Linus Torvalds <torvalds@linux-foundation.org>
cc: David Laight <David.Laight@ACULAB.COM>
cc: linux-block@vger.kernel.org
cc: linux-fsdevel@vger.kernel.org
cc: linux-mm@kvack.org
Signed-off-by: Christian Brauner <brauner@kernel.org>
Renumber the ITER_* iterator-type constants to put things in the same order
as in the iteration functions and to group user-backed iterators at the
bottom.
Signed-off-by: David Howells <dhowells@redhat.com>
Link: https://lore.kernel.org/r/20230925120309.1731676-6-dhowells@redhat.com
cc: Alexander Viro <viro@zeniv.linux.org.uk>
cc: Jens Axboe <axboe@kernel.dk>
cc: Christoph Hellwig <hch@lst.de>
cc: Christian Brauner <christian@brauner.io>
cc: Matthew Wilcox <willy@infradead.org>
cc: Linus Torvalds <torvalds@linux-foundation.org>
cc: David Laight <David.Laight@ACULAB.COM>
cc: linux-block@vger.kernel.org
cc: linux-fsdevel@vger.kernel.org
cc: linux-mm@kvack.org
Signed-off-by: Christian Brauner <brauner@kernel.org>
Use user_backed_iter() to see if iterator is UBUF/IOVEC rather than poking
inside the iterator.
Signed-off-by: David Howells <dhowells@redhat.com>
Link: https://lore.kernel.org/r/20230925120309.1731676-5-dhowells@redhat.com
cc: Dennis Dalessandro <dennis.dalessandro@cornelisnetworks.com>
cc: Jason Gunthorpe <jgg@ziepe.ca>
cc: Leon Romanovsky <leon@kernel.org>
cc: linux-rdma@vger.kernel.org
Signed-off-by: Christian Brauner <brauner@kernel.org>
copy_mc_to_user() has the destination marked __user on powerpc, but not on
x86; the latter results in a sparse warning in lib/iov_iter.c.
Fix this by applying the tag on x86 too.
Fixes: ec6347bb43 ("x86, powerpc: Rename memcpy_mcsafe() to copy_mc_to_{user, kernel}()")
Signed-off-by: David Howells <dhowells@redhat.com>
Link: https://lore.kernel.org/r/20230925120309.1731676-3-dhowells@redhat.com
cc: Dan Williams <dan.j.williams@intel.com>
cc: Thomas Gleixner <tglx@linutronix.de>
cc: Ingo Molnar <mingo@redhat.com>
cc: Borislav Petkov <bp@alien8.de>
cc: Dave Hansen <dave.hansen@linux.intel.com>
cc: "H. Peter Anvin" <hpa@zytor.com>
cc: Alexander Viro <viro@zeniv.linux.org.uk>
cc: Jens Axboe <axboe@kernel.dk>
cc: Christoph Hellwig <hch@lst.de>
cc: Christian Brauner <christian@brauner.io>
cc: Matthew Wilcox <willy@infradead.org>
cc: Linus Torvalds <torvalds@linux-foundation.org>
cc: David Laight <David.Laight@ACULAB.COM>
cc: x86@kernel.org
cc: linux-block@vger.kernel.org
cc: linux-fsdevel@vger.kernel.org
cc: linux-mm@kvack.org
Signed-off-by: Christian Brauner <brauner@kernel.org>
Now that ITER_PIPE has been removed, iov_iter::last_offset is no longer
used, so remove it.
Signed-off-by: David Howells <dhowells@redhat.com>
Link: https://lore.kernel.org/r/20230925120309.1731676-2-dhowells@redhat.com
cc: Alexander Viro <viro@zeniv.linux.org.uk>
cc: Jens Axboe <axboe@kernel.dk>
cc: Christoph Hellwig <hch@lst.de>
cc: Christian Brauner <christian@brauner.io>
cc: Matthew Wilcox <willy@infradead.org>
cc: Linus Torvalds <torvalds@linux-foundation.org>
cc: David Laight <David.Laight@ACULAB.COM>
cc: linux-block@vger.kernel.org
cc: linux-fsdevel@vger.kernel.org
cc: linux-mm@kvack.org
Signed-off-by: Christian Brauner <brauner@kernel.org>
- Fix an UV boot crash,
- Skip spurious ENDBR generation on _THIS_IP_,
- Fix ENDBR use in putuser() asm methods,
- Fix corner case boot crashes on 5-level paging,
- and fix a false positive WARNING on LTO kernels.
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'x86-urgent-2023-09-17' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Ingo Molnar:
"Misc fixes:
- Fix an UV boot crash
- Skip spurious ENDBR generation on _THIS_IP_
- Fix ENDBR use in putuser() asm methods
- Fix corner case boot crashes on 5-level paging
- and fix a false positive WARNING on LTO kernels"
* tag 'x86-urgent-2023-09-17' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/purgatory: Remove LTO flags
x86/boot/compressed: Reserve more memory for page tables
x86/ibt: Avoid duplicate ENDBR in __put_user_nocheck*()
x86/ibt: Suppress spurious ENDBR
x86/platform/uv: Use alternate source for socket to node data
balancing bug, and a topology setup bug on (Intel) hybrid processors.
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'sched-urgent-2023-09-17' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull scheduler fixes from Ingo Molnar:
"Fix a performance regression on large SMT systems, an Intel SMT4
balancing bug, and a topology setup bug on (Intel) hybrid processors"
* tag 'sched-urgent-2023-09-17' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/sched: Restore the SD_ASYM_PACKING flag in the DIE domain
sched/fair: Fix SMT4 group_smt_balance handling
sched/fair: Optimize should_we_balance() for large SMT systems
The choose_32_64() macros were added to deal with an odd inconsistency
between the 32-bit and 64-bit layout of 'struct stat' way back when in
commit a52dd971f9 ("vfs: de-crapify "cp_new_stat()" function").
Then a decade later Mikulas noticed that said inconsistency had been a
mistake in the early x86-64 port, and shouldn't have existed in the
first place. So commit 932aba1e16 ("stat: fix inconsistency between
struct stat and struct compat_stat") removed the uses of the helpers.
But the helpers remained around, unused.
Get rid of them.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Merge tag '6.6-rc1-smb3-client-fixes' of git://git.samba.org/sfrench/cifs-2.6
Pull smb client fixes from Steve French:
"Three small SMB3 client fixes, one to improve a null check and two
minor cleanups"
* tag '6.6-rc1-smb3-client-fixes' of git://git.samba.org/sfrench/cifs-2.6:
smb3: fix some minor typos and repeated words
smb3: correct places where ENOTSUPP is used instead of preferred EOPNOTSUPP
smb3: move server check earlier when setting channel sequence number
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Merge tag 'ext4_for_linus-6.6-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4
Pull ext4 fixes from Ted Ts'o:
"Regression and bug fixes for ext4"
* tag 'ext4_for_linus-6.6-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
ext4: fix rec_len verify error
ext4: do not let fstrim block system suspend
ext4: move setting of trimmed bit into ext4_try_to_trim_range()
jbd2: Fix memory leak in journal_init_common()
jbd2: Remove page size assumptions
buffer: Make bh_offset() work for compound pages
-flto* implies -ffunction-sections. With LTO enabled, ld.lld generates
multiple .text sections for purgatory.ro:
$ readelf -S purgatory.ro | grep " .text"
[ 1] .text PROGBITS 0000000000000000 00000040
[ 7] .text.purgatory PROGBITS 0000000000000000 000020e0
[ 9] .text.warn PROGBITS 0000000000000000 000021c0
[13] .text.sha256_upda PROGBITS 0000000000000000 000022f0
[15] .text.sha224_upda PROGBITS 0000000000000000 00002be0
[17] .text.sha256_fina PROGBITS 0000000000000000 00002bf0
[19] .text.sha224_fina PROGBITS 0000000000000000 00002cc0
This causes WARNING from kexec_purgatory_setup_sechdrs():
WARNING: CPU: 26 PID: 110894 at kernel/kexec_file.c:919
kexec_load_purgatory+0x37f/0x390
Fix this by disabling LTO for purgatory.
[ AFAICT, x86 is the only arch that supports LTO and purgatory. ]
We could also fix this with an explicit linker script to rejoin .text.*
sections back into .text. However, given the benefit of LTOing purgatory
is small, simply disable the production of more .text.* sections for now.
Fixes: b33fff07e3 ("x86, build: allow LTO to be selected")
Signed-off-by: Song Liu <song@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Sami Tolvanen <samitolvanen@google.com>
Link: https://lore.kernel.org/r/20230914170138.995606-1-song@kernel.org
The decompressor has a hard limit on the number of page tables it can
allocate. This limit is defined at compile-time and will cause boot
failure if it is reached.
The kernel is very strict and calculates the limit precisely for the
worst-case scenario based on the current configuration. However, it is
easy to forget to adjust the limit when a new use-case arises. The
worst-case scenario is rarely encountered during sanity checks.
In the case of enabling 5-level paging, a use-case was overlooked. The
limit needs to be increased by one to accommodate the additional level.
This oversight went unnoticed until Aaron attempted to run the kernel
via kexec with 5-level paging and unaccepted memory enabled.
Update wost-case calculations to include 5-level paging.
To address this issue, let's allocate some extra space for page tables.
128K should be sufficient for any use-case. The logic can be simplified
by using a single value for all kernel configurations.
[ Also add a warning, should this memory run low - by Dave Hansen. ]
Fixes: 34bbb0009f ("x86/boot/compressed: Enable 5-level paging during decompression stage")
Reported-by: Aaron Lu <aaron.lu@intel.com>
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20230915070221.10266-1-kirill.shutemov@linux.intel.com
- Fix kernel-devel RPM and linux-headers Deb package
- Fix too long argument list error in 'make modules_install'
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Merge tag 'kbuild-fixes-v6.6' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
Pull Kbuild fixes from Masahiro Yamada:
- Fix kernel-devel RPM and linux-headers Deb package
- Fix too long argument list error in 'make modules_install'
* tag 'kbuild-fixes-v6.6' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild:
kbuild: avoid long argument lists in make modules_install
kbuild: fix kernel-devel RPM package and linux-headers Deb package
Commit 408579cd62 ("mm: Update do_vmi_align_munmap() return
semantics") seems to have updated one of the callers of do_vmi_munmap()
incorrectly: it used to check for the error case (which didn't
change: negative means error).
That commit changed the check to the success case (which did change:
before that commit, 0 was success, and 1 was "success and lock
downgraded". After the change, it's always 0 for success, and the lock
will have been released if requested).
This didn't change any actual VM behavior _except_ for memory accounting
when 'VM_ACCOUNT' was set on the vma. Which made the wrong return value
test fairly subtle, since everything continues to work.
Or rather - it continues to work but the "Committed memory" accounting
goes all wonky (Committed_AS value in /proc/meminfo), and depending on
settings that then causes problems much much later as the VM relies on
bogus statistics for its heuristics.
Revert that one line of the change back to the original logic.
Fixes: 408579cd62 ("mm: Update do_vmi_align_munmap() return semantics")
Reported-by: Christoph Biedl <linux-kernel.bfrz@manchmal.in-ulm.de>
Reported-bisected-and-tested-by: Michael Labiuk <michael.labiuk@virtuozzo.com>
Cc: Bagas Sanjaya <bagasdotme@gmail.com>
Cc: Liam R. Howlett <Liam.Howlett@oracle.com>
Link: https://lore.kernel.org/all/1694366957@msgid.manchmal.in-ulm.de/
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
16 small(ish) fixes all in drivers. The major fixes are in pm8001
(fixes MSI-X issue going back to its origin), the qla2xxx endianness
fix, which fixes a bug on big endian and the lpfc ones which can cause
an oops on module removal without them.
Signed-off-by: James E.J. Bottomley <jejb@linux.ibm.com>
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Merge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
Pull SCSI fixes from James Bottomley:
"16 small(ish) fixes all in drivers.
The major fixes are in pm8001 (fixes MSI-X issue going back to its
origin), the qla2xxx endianness fix, which fixes a bug on big endian
and the lpfc ones which can cause an oops on module removal without
them"
* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
scsi: lpfc: Prevent use-after-free during rmmod with mapped NVMe rports
scsi: lpfc: Early return after marking final NLP_DROPPED flag in dev_loss_tmo
scsi: lpfc: Fix the NULL vs IS_ERR() bug for debugfs_create_file()
scsi: target: core: Fix target_cmd_counter leak
scsi: pm8001: Setup IRQs on resume
scsi: pm80xx: Avoid leaking tags when processing OPC_INB_SET_CONTROLLER_CONFIG command
scsi: pm80xx: Use phy-specific SAS address when sending PHY_START command
scsi: ufs: core: Poll HCS.UCRDY before issuing a UIC command
scsi: ufs: core: Move __ufshcd_send_uic_cmd() outside host_lock
scsi: qedf: Add synchronization between I/O completions and abort
scsi: target: Replace strlcpy() with strscpy()
scsi: qla2xxx: Fix NULL vs IS_ERR() bug for debugfs_create_dir()
scsi: qla2xxx: Use raw_smp_processor_id() instead of smp_processor_id()
scsi: qla2xxx: Correct endianness for rqstlen and rsplen
scsi: ppa: Fix accidentally reversed conditions for 16-bit and 32-bit EPP
scsi: megaraid_sas: Fix deadlock on firmware crashdump
- Fix link power management transitions to disallow unsupported
states (Niklas).
- A small string handling fix for the sata_mv driver (Christophe).
- Clear port pending interrupts before reset, as per AHCI
specifications (Szuying). Followup fixes for this one are to not
clear ATA_PFLAG_EH_PENDING in ata_eh_reset() to allow EH to
continue on with other actions recorded with error interrupts
triggered before EH completes. A~Nd an additional fix to avoid
thawing a port twice in EH (Niklas).
- Small code style fixes in the pata_parport driver to silence the
build bot as it keeps complaining about bad indentation (me).
- A fix for the recent CDL code to avoid fetching sense data for
successful commands when not necessary for correct operation
(Niklas).
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Merge tag 'ata-6.6-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/dlemoal/libata
Pull ata fixes from Damien Le Moal:
- Fix link power management transitions to disallow unsupported states
(Niklas)
- A small string handling fix for the sata_mv driver (Christophe)
- Clear port pending interrupts before reset, as per AHCI
specifications (Szuying).
Followup fixes for this one are to not clear ATA_PFLAG_EH_PENDING in
ata_eh_reset() to allow EH to continue on with other actions recorded
with error interrupts triggered before EH completes. And an
additional fix to avoid thawing a port twice in EH (Niklas)
- Small code style fixes in the pata_parport driver to silence the
build bot as it keeps complaining about bad indentation (me)
- A fix for the recent CDL code to avoid fetching sense data for
successful commands when not necessary for correct operation (Niklas)
* tag 'ata-6.6-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/dlemoal/libata:
ata: libata-core: fetch sense data for successful commands iff CDL enabled
ata: libata-eh: do not thaw the port twice in ata_eh_reset()
ata: libata-eh: do not clear ATA_PFLAG_EH_PENDING in ata_eh_reset()
ata: pata_parport: Fix code style issues
ata: libahci: clear pending interrupt status
ata: sata_mv: Fix incorrect string length computation in mv_dump_mem()
ata: libata: disallow dev-initiated LPM transitions to unsupported states
Here is a single USB fix for a much-reported regression for 6.6-rc1.
It resolves a crash in the typec debugfs code for many systems. It's
been in linux-next with no reported issues, and many people have
reported it resolving their problem with 6.6-rc1.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'usb-6.6-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
Pull USB fix from Greg KH:
"Here is a single USB fix for a much-reported regression for 6.6-rc1.
It resolves a crash in the typec debugfs code for many systems. It's
been in linux-next with no reported issues, and many people have
reported it resolving their problem with 6.6-rc1"
* tag 'usb-6.6-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
usb: typec: ucsi: Fix NULL pointer dereference
Here is a single driver core fix for a much-reported-by-sysbot issue
that showed up in 6.6-rc1. It's been submitted by many people, all in
the same way, so it obviously fixes things for them all.
Also in here is a single documentation update adding riscv to the
embargoed hardware document in case there are any future issues with
that processor family.
Both of these have been in linux-next with no reported problems.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'driver-core-6.6-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
Pull driver core fixes from Greg KH:
"Here is a single driver core fix for a much-reported-by-sysbot issue
that showed up in 6.6-rc1. It's been submitted by many people, all in
the same way, so it obviously fixes things for them all.
Also in here is a single documentation update adding riscv to the
embargoed hardware document in case there are any future issues with
that processor family.
Both of these have been in linux-next with no reported problems"
* tag 'driver-core-6.6-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core:
Documentation: embargoed-hardware-issues.rst: Add myself for RISC-V
driver core: return an error when dev_set_name() hasn't happened
Here is a single patch for 6.6-rc2 that reverts a 6.5 change for the
comedi subsystem that has ended up being incorrect and caused drivers
that were working for people to be unable to be able to be selected to
build at all. To fix this, the Kconfig change needs to be reverted and
a future set of fixes for the ioport dependancies will show up in
6.7-rc1 (there's no rush for them.)
This has been in linux-next with no reported issues.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'char-misc-6.6-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
Pull char/misc fix from Greg KH:
"Here is a single patch for 6.6-rc2 that reverts a 6.5 change for the
comedi subsystem that has ended up being incorrect and caused drivers
that were working for people to be unable to be able to be selected to
build at all.
To fix this, the Kconfig change needs to be reverted and a future set
of fixes for the ioport dependancies will show up in 6.7-rc1 (there's
no rush for them.)
This has been in linux-next with no reported issues"
* tag 'char-misc-6.6-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
Revert "comedi: add HAS_IOPORT dependencies"
are converted now. Thanks Uwe, this marks the end of a long conversion
process. Other than that, we have a few Kconfig updates and driver
bugfixes.
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Merge tag 'i2c-for-6.6-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux
Pull i2c fixes from Wolfram Sang:
"The main thing is the removal of 'probe_new' because all i2c client
drivers are converted now. Thanks Uwe, this marks the end of a long
conversion process.
Other than that, we have a few Kconfig updates and driver bugfixes"
* tag 'i2c-for-6.6-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
i2c: cadence: Fix the kernel-doc warnings
i2c: aspeed: Reset the i2c controller when timeout occurs
i2c: I2C_MLXCPLD on ARM64 should depend on ACPI
i2c: Make I2C_ATR invisible
i2c: Drop legacy callback .probe_new()
w1: ds2482: Switch back to use struct i2c_driver's .probe()
Currently, we fetch sense data for a _successful_ command if either:
1) Command was NCQ and ATA_DFLAG_CDL_ENABLED flag set (flag
ATA_DFLAG_CDL_ENABLED will only be set if the Successful NCQ command
sense data supported bit is set); or
2) Command was non-NCQ and regular sense data reporting is enabled.
This means that case 2) will trigger for a non-NCQ command which has
ATA_SENSE bit set, regardless if CDL is enabled or not.
This decision was by design. If the device reports that it has sense data
available, it makes sense to fetch that sense data, since the sk/asc/ascq
could be important information regardless if CDL is enabled or not.
However, the fetching of sense data for a successful command is done via
ATA EH. Considering how intricate the ATA EH is, we really do not want to
invoke ATA EH unless absolutely needed.
Before commit 18bd7718b5 ("scsi: ata: libata: Handle completion of CDL
commands using policy 0xD") we never fetched sense data for successful
commands.
In order to not invoke the ATA EH unless absolutely necessary, even if the
device claims support for sense data reporting, only fetch sense data for
successful (NCQ and non-NCQ commands) commands that are using CDL.
[Damien] Modified the check to test the qc flag ATA_QCFLAG_HAS_CDL
instead of the device support for CDL, which is implied for commands
using CDL.
Fixes: 3ac873c76d ("ata: libata-core: fix when to fetch sense data for successful commands")
Signed-off-by: Niklas Cassel <niklas.cassel@wdc.com>
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
commit 1e641060c4 ("libata: clear eh_info on reset completion") added
a workaround that broke the retry mechanism in ATA EH.
Tejun himself suggested to remove this workaround when it was identified
to cause additional problems:
https://lore.kernel.org/linux-ide/20110426135027.GI878@htj.dyndns.org/
He even said:
"Hmm... it seems I wasn't thinking straight when I added that work around."
https://lore.kernel.org/linux-ide/20110426155229.GM878@htj.dyndns.org/
While removing the workaround solved the issue, however, the workaround was
kept to avoid "spurious hotplug events during reset", and instead another
workaround was added on top of the existing workaround in commit
8c56cacc72 ("libata: fix unexpectedly frozen port after ata_eh_reset()").
Because these IRQs happened when the port was frozen, we know that they
were actually a side effect of PxIS and IS.IPS(x) not being cleared before
the COMRESET. This is now done in commit 94152042eaa9 ("ata: libahci: clear
pending interrupt status"), so these workarounds can now be removed.
Since commit 1e641060c4 ("libata: clear eh_info on reset completion") has
now been reverted, the ATA EH retry mechanism is functional again, so there
is once again no need to thaw the port more than once in ata_eh_reset().
This reverts "the workaround on top of the workaround" introduced in commit
8c56cacc72 ("libata: fix unexpectedly frozen port after ata_eh_reset()").
Signed-off-by: Niklas Cassel <niklas.cassel@wdc.com>
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
ata_scsi_port_error_handler() starts off by clearing ATA_PFLAG_EH_PENDING,
before calling ap->ops->error_handler() (without holding the ap->lock).
If an error IRQ is received while ap->ops->error_handler() is running,
the irq handler will set ATA_PFLAG_EH_PENDING.
Once ap->ops->error_handler() returns, ata_scsi_port_error_handler()
checks if ATA_PFLAG_EH_PENDING is set, and if it is, another iteration
of ATA EH is performed.
The problem is that ATA_PFLAG_EH_PENDING is not only cleared by
ata_scsi_port_error_handler(), it is also cleared by ata_eh_reset().
ata_eh_reset() is called by ap->ops->error_handler(). This additional
clearing done by ata_eh_reset() breaks the whole retry logic in
ata_scsi_port_error_handler(). Thus, if an error IRQ is received while
ap->ops->error_handler() is running, the port will currently remain
frozen and will never get re-enabled.
The additional clearing in ata_eh_reset() was introduced in commit
1e641060c4 ("libata: clear eh_info on reset completion").
Looking at the original error report:
https://marc.info/?l=linux-ide&m=124765325828495&w=2
We can see the following happening:
[ 1.074659] ata3: XXX port freeze
[ 1.074700] ata3: XXX hardresetting link, stopping engine
[ 1.074746] ata3: XXX flipping SControl
[ 1.411471] ata3: XXX irq_stat=400040 CONN|PHY
[ 1.411475] ata3: XXX port freeze
[ 1.420049] ata3: XXX starting engine
[ 1.420096] ata3: XXX rc=0, class=1
[ 1.420142] ata3: XXX clearing IRQs for thawing
[ 1.420188] ata3: XXX port thawed
[ 1.420234] ata3: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
We are not supposed to be able to receive an error IRQ while the port is
frozen (PxIE is set to 0, i.e. all IRQs for the port are disabled).
AHCI 1.3.1 section 10.7.1.1 First Tier (IS Register) states:
"Each bit location can be thought of as reporting a '1' if the virtual
"interrupt line" for that port is indicating it wishes to generate an
interrupt. That is, if a port has one or more interrupt status bit set,
and the enables for those status bits are set, then this bit shall be set."
Additionally, AHCI state P:ComInit clearly shows that the state machine
will only jump to P:ComInitSetIS (which sets IS.IPS(x) to '1'), if PxIE.PCE
is set to '1'. In our case, PxIE is set to 0, so IS.IPS(x) won't get set.
So IS.IPS(x) only gets set if PxIS and PxIE is set.
AHCI 1.3.1 section 10.7.1.1 First Tier (IS Register) also states:
"The bits in this register are read/write clear. It is set by the level of
the virtual interrupt line being a set, and cleared by a write of '1' from
the software."
So if IS.IPS(x) is set, you need to explicitly clear it by writing a 1 to
IS.IPS(x) for that port.
Since PxIE is cleared, the only way to get an interrupt while the port is
frozen, is if IS.IPS(x) is set, and the only way IS.IPS(x) can be set when
the port is frozen, is if it was set before the port was frozen.
However, since commit 737dd811a3 ("ata: libahci: clear pending interrupt
status"), we clear both PxIS and IS.IPS(x) after freezing the port, but
before the COMRESET, so the problem that commit 1e641060c4 ("libata:
clear eh_info on reset completion") fixed can no longer happen.
Thus, revert commit 1e641060c4 ("libata: clear eh_info on reset
completion"), so that the retry logic in ata_scsi_port_error_handler()
works once again. (The retry logic is still needed, since we can still
get an error IRQ _after_ the port has been thawed, but before
ata_scsi_port_error_handler() takes the ap->lock in order to check
if ATA_PFLAG_EH_PENDING is set.)
Signed-off-by: Niklas Cassel <niklas.cassel@wdc.com>
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
This kselftest fixes update for Linux 6.6-rc2 consists of important
fixes to user_events test and ftrace test.
user_events test has been enabled for default run in Linux 6.6-rc1. The
following fixes are for bugs found since then:
- adds checks for dependencies and skips the test. user_events test
requires root access, and tracefs and user_events enabled. It leaves
tracefs mounted and a fix is in progress for that missing piece.
- creates user_events test-specific Kconfig fragments.
ftrace test fixes:
- unmounts tracefs for recovering environment. Fix identified during the
above mentioned user_events dependencies fix.
- adds softlink to latest log directory improving usage.
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Merge tag 'linux-kselftest-fixes-6.6-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest
Pull more kselftest fixes from Shuah Khan
"Fixes to user_events test and ftrace test.
The user_events test was enabled by default in Linux 6.6-rc1. The
following fixes are for bugs found since then:
- add checks for dependencies and skip the test if they aren't met.
The user_events test requires root access, and tracefs and
user_events enabled. It leaves tracefs mounted and a fix is in
progress for that missing piece.
- create user_events test-specific Kconfig fragments
ftrace test fixes:
- unmount tracefs for recovering environment. Fix identified during
the above mentioned user_events dependencies fix.
- adds softlink to latest log directory improving usage"
* tag 'linux-kselftest-fixes-6.6-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest:
selftests: tracing: Fix to unmount tracefs for recovering environment
selftests: user_events: create test-specific Kconfig fragments
ftrace/selftests: Add softlink to latest log directory
selftests/user_events: Fix failures when user_events is not installed
- Use correct order when encoding NFSv4 RENAME change_info
- Fix a potential oops during NFSD shutdown
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Merge tag 'nfsd-6.6-1' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux
Pull nfsd fixes from Chuck Lever:
- Use correct order when encoding NFSv4 RENAME change_info
- Fix a potential oops during NFSD shutdown
* tag 'nfsd-6.6-1' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux:
NFSD: fix possible oops when nfsd/pool_stats is closed.
nfsd: fix change_info in NFSv4 RENAME replies
Fix the handling of block devices in the test_resume mode of
hibernation (Chen Yu).
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Merge tag 'pm-6.6-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull power management fixes from Rafael Wysocki:
"Fix the handling of block devices in the test_resume mode of
hibernation (Chen Yu)"
* tag 'pm-6.6-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
PM: hibernate: Fix the exclusive get block device in test_resume mode
PM: hibernate: Rename function parameter from snapshot_test to exclusive
- Unbreak disabled trip point check in handle_thermal_trip() that may
cause it to skip enabled trip points (Rafael Wysocki).
- Add missing of_node_put() to of_find_trip_id() and
thermal_of_for_each_cooling_maps() that each break out of a
for_each_child_of_node() loop without dropping the reference to
the child object (Julia Lawall).
- Constify the recently added trip argument of the .get_trend() thermal
zone callback (Rafael Wysocki).
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Merge tag 'thermal-6.6-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull thermal control fixes from Rafael Wysocki:
"These fix a thermal core breakage introduced by one of the recent
changes, amend those changes by adding 'const' to a new callback
argument and fix two memory leaks.
Specifics:
- Unbreak disabled trip point check in handle_thermal_trip() that may
cause it to skip enabled trip points (Rafael Wysocki)
- Add missing of_node_put() to of_find_trip_id() and
thermal_of_for_each_cooling_maps() that each break out of a
for_each_child_of_node() loop without dropping the reference to the
child object (Julia Lawall)
- Constify the recently added trip argument of the .get_trend()
thermal zone callback (Rafael Wysocki)"
* tag 'thermal-6.6-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
thermal: core: Fix disabled trip point check in handle_thermal_trip()
thermal: Constify the trip argument of the .get_trend() zone callback
thermal/of: add missing of_node_put()
table's list of devices that is managed using dm_{get,put}_device.
- Revert DM core's half-baked RCU optimization if IO submitter has set
REQ_NOWAIT. Can be revisited, and properly justified, after
comprehensively auditing all of DM to also pass GFP_NOWAIT for any
allocations if REQ_NOWAIT used.
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Merge tag 'for-6.6/dm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm
Pull device mapper fixes from Mike Snitzer:
- Fix DM core retrieve_deps() UAF race due to missing locking of a DM
table's list of devices that is managed using dm_{get,put}_device.
- Revert DM core's half-baked RCU optimization if IO submitter has set
REQ_NOWAIT. Can be revisited, and properly justified, after
comprehensively auditing all of DM to also pass GFP_NOWAIT for any
allocations if REQ_NOWAIT used.
* tag 'for-6.6/dm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm:
dm: don't attempt to queue IO under RCU protection
dm: fix a race condition in retrieve_deps
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Merge tag 'block-6.6-2023-09-15' of git://git.kernel.dk/linux
Pull block fixes from Jens Axboe:
- NVMe pull via Keith:
- nvme-tcp iov len fix (Varun)
- nvme-hwmon const qualifier for safety (Krzysztof)
- nvme-fc null pointer checks (Nigel)
- nvme-pci no numa node fix (Pratyush)
- nvme timeout fix for non-compliant controllers (Keith)
- MD pull via Song fixing regressions with both 6.5 and 6.6
- Fix a use-after-free regression in resizing blk-mq tags (Chengming)
* tag 'block-6.6-2023-09-15' of git://git.kernel.dk/linux:
nvme: avoid bogus CRTO values
md: Put the right device in md_seq_next
nvme-pci: do not set the NUMA node of device if it has none
blk-mq: fix tags UAF when shrinking q->nr_hw_queues
md/raid1: fix error: ISO C90 forbids mixed declarations
md: fix warning for holder mismatch from export_rdev()
md: don't dereference mddev after export_rdev()
nvme-fc: Prevent null pointer dereference in nvme_fc_io_getuuid()
nvme: host: hwmon: constify pointers to hwmon_channel_info
nvmet-tcp: pass iov_len instead of sg->length to bvec_set_page()
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Merge tag 'io_uring-6.6-2023-09-15' of git://git.kernel.dk/linux
Pull io_uring fix from Jens Axboe:
"Just a single fix, fixing a regression with poll first, recvmsg, and
using a provided buffer"
* tag 'io_uring-6.6-2023-09-15' of git://git.kernel.dk/linux:
io_uring/net: fix iter retargeting for selected buf
A change applied to v6.5 kernel brings an issue that usual GFP allocation
is done in atomic context under acquired spin-lock. Let us revert it.
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Merge tag 'firewire-fixes-6.6-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394
Pull firewire fix from Takashi Sakamoto:
"A change applied to v6.5 kernel brings an issue that usual GFP
allocation is done in atomic context under acquired spin-lock. Let us
revert it"
* tag 'firewire-fixes-6.6-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394:
Revert "firewire: core: obsolete usage of GFP_ATOMIC at building node tree"
connector:
- doc fix
exec:
- workaround lockdep issue
tests:
- fix a UAF
vkms:
- revert hrtimer fix
fbdev:
- g364fb: fix build failure with mips
i915:
- Only check eDP HPD when AUX CH is shared.
amdgpu:
- GC 9.4.3 fixes
- Fix white screen issues with S/G display on system with >= 64G of ram
- Replay fixes
- SMU 13.0.6 fixes
- AUX backlight fix
- NBIO 4.3 SR-IOV fixes for HDP
- RAS fixes
- DP MST resume fix
- Fix segfault on systems with no vbios
- DPIA fixes
amdkfd:
- CWSR grace period fix
- Unaligned doorbell fix
- CRIU fix for GFX11
- Add missing TLB flush on gfx10 and newer
radeon:
- make fence wait in suballocator uninterrruptable
gm12u320:
- Fix the timeout usage for usb_bulk_msg()
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Merge tag 'drm-fixes-2023-09-15' of git://anongit.freedesktop.org/drm/drm
Pull drm fixes from Dave Airlie:
"Regular rc2 fixes pull, mostly made up of amdgpu stuff, one i915, and
a bunch of others, one vkms locking violation is reverted.
connector:
- doc fix
exec:
- workaround lockdep issue
tests:
- fix a UAF
vkms:
- revert hrtimer fix
fbdev:
- g364fb: fix build failure with mips
i915:
- Only check eDP HPD when AUX CH is shared.
amdgpu:
- GC 9.4.3 fixes
- Fix white screen issues with S/G display on system with >= 64G of ram
- Replay fixes
- SMU 13.0.6 fixes
- AUX backlight fix
- NBIO 4.3 SR-IOV fixes for HDP
- RAS fixes
- DP MST resume fix
- Fix segfault on systems with no vbios
- DPIA fixes
amdkfd:
- CWSR grace period fix
- Unaligned doorbell fix
- CRIU fix for GFX11
- Add missing TLB flush on gfx10 and newer
radeon:
- make fence wait in suballocator uninterrruptable
gm12u320:
- Fix the timeout usage for usb_bulk_msg()"
* tag 'drm-fixes-2023-09-15' of git://anongit.freedesktop.org/drm/drm: (29 commits)
drm/tests: helpers: Avoid a driver uaf
Revert "drm/vkms: Fix race-condition between the hrtimer and the atomic commit"
drm/amdkfd: Insert missing TLB flush on GFX10 and later
drm/i915: Only check eDP HPD when AUX CH is shared
drm/amd/display: Fix 2nd DPIA encoder Assignment
drm/amd/display: Add DPIA Link Encoder Assignment Fix
drm/amd/display: fix replay_mode kernel-doc warning
drm/amdgpu: Handle null atom context in VBIOS info ioctl
drm/amdkfd: Checkpoint and restore queues on GFX11
drm/amd/display: Adjust the MST resume flow
drm/amdgpu: fallback to old RAS error message for aqua_vanjaram
drm/amdgpu/nbio4.3: set proper rmmio_remap.reg_offset for SR-IOV
drm/amdgpu/soc21: don't remap HDP registers for SR-IOV
drm/amd/display: Don't check registers, if using AUX BL control
drm/amdgpu: fix retry loop test
drm/amd/display: Add dirty rect support for Replay
Revert "drm/amd: Disable S/G for APUs when 64GB or more host memory"
drm/amd/display: fix the white screen issue when >= 64GB DRAM
drm/amdkfd: Update CU masking for GFX 9.4.3
drm/amdkfd: Update cache info reporting for GFX v9.4.3
...
- Missing x86 patch for the runtime cleanup that was merged in -rc1
- Kconfig tweak for kexec on x86 so EFI support does not get disabled
inadvertently
- Use the right EFI memory type for the unaccepted memory table so
kexec/kdump exposes it to the crash kernel as well
- Work around EFI implementations which do not implement
QueryVariableInfo, which is now called by statfs() on efivarfs
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Merge tag 'efi-fixes-for-v6.6-1' of git://git.kernel.org/pub/scm/linux/kernel/git/efi/efi
Pull EFI fixes from Ard Biesheuvel:
- Missing x86 patch for the runtime cleanup that was merged in -rc1
- Kconfig tweak for kexec on x86 so EFI support does not get disabled
inadvertently
- Use the right EFI memory type for the unaccepted memory table so
kexec/kdump exposes it to the crash kernel as well
- Work around EFI implementations which do not implement
QueryVariableInfo, which is now called by statfs() on efivarfs
* tag 'efi-fixes-for-v6.6-1' of git://git.kernel.org/pub/scm/linux/kernel/git/efi/efi:
efivarfs: fix statfs() on efivarfs
efi/unaccepted: Use ACPI reclaim memory for unaccepted memory table
efi/x86: Ensure that EFI_RUNTIME_MAP is enabled for kexec
efi/x86: Move EFI runtime call setup/teardown helpers out of line
dm looks up the table for IO based on the request type, with an
assumption that if the request is marked REQ_NOWAIT, it's fine to
attempt to submit that IO while under RCU read lock protection. This
is not OK, as REQ_NOWAIT just means that we should not be sleeping
waiting on other IO, it does not mean that we can't potentially
schedule.
A simple test case demonstrates this quite nicely:
int main(int argc, char *argv[])
{
struct iovec iov;
int fd;
fd = open("/dev/dm-0", O_RDONLY | O_DIRECT);
posix_memalign(&iov.iov_base, 4096, 4096);
iov.iov_len = 4096;
preadv2(fd, &iov, 1, 0, RWF_NOWAIT);
return 0;
}
which will instantly spew:
BUG: sleeping function called from invalid context at include/linux/sched/mm.h:306
in_atomic(): 0, irqs_disabled(): 0, non_block: 0, pid: 5580, name: dm-nowait
preempt_count: 0, expected: 0
RCU nest depth: 1, expected: 0
INFO: lockdep is turned off.
CPU: 7 PID: 5580 Comm: dm-nowait Not tainted 6.6.0-rc1-g39956d2dcd81 #132
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
<TASK>
dump_stack_lvl+0x11d/0x1b0
__might_resched+0x3c3/0x5e0
? preempt_count_sub+0x150/0x150
mempool_alloc+0x1e2/0x390
? mempool_resize+0x7d0/0x7d0
? lock_sync+0x190/0x190
? lock_release+0x4b7/0x670
? internal_get_user_pages_fast+0x868/0x2d40
bio_alloc_bioset+0x417/0x8c0
? bvec_alloc+0x200/0x200
? internal_get_user_pages_fast+0xb8c/0x2d40
bio_alloc_clone+0x53/0x100
dm_submit_bio+0x27f/0x1a20
? lock_release+0x4b7/0x670
? blk_try_enter_queue+0x1a0/0x4d0
? dm_dax_direct_access+0x260/0x260
? rcu_is_watching+0x12/0xb0
? blk_try_enter_queue+0x1cc/0x4d0
__submit_bio+0x239/0x310
? __bio_queue_enter+0x700/0x700
? kvm_clock_get_cycles+0x40/0x60
? ktime_get+0x285/0x470
submit_bio_noacct_nocheck+0x4d9/0xb80
? should_fail_request+0x80/0x80
? preempt_count_sub+0x150/0x150
? lock_release+0x4b7/0x670
? __bio_add_page+0x143/0x2d0
? iov_iter_revert+0x27/0x360
submit_bio_noacct+0x53e/0x1b30
submit_bio_wait+0x10a/0x230
? submit_bio_wait_endio+0x40/0x40
__blkdev_direct_IO_simple+0x4f8/0x780
? blkdev_bio_end_io+0x4c0/0x4c0
? stack_trace_save+0x90/0xc0
? __bio_clone+0x3c0/0x3c0
? lock_release+0x4b7/0x670
? lock_sync+0x190/0x190
? atime_needs_update+0x3bf/0x7e0
? timestamp_truncate+0x21b/0x2d0
? inode_owner_or_capable+0x240/0x240
blkdev_direct_IO.part.0+0x84a/0x1810
? rcu_is_watching+0x12/0xb0
? lock_release+0x4b7/0x670
? blkdev_read_iter+0x40d/0x530
? reacquire_held_locks+0x4e0/0x4e0
? __blkdev_direct_IO_simple+0x780/0x780
? rcu_is_watching+0x12/0xb0
? __mark_inode_dirty+0x297/0xd50
? preempt_count_add+0x72/0x140
blkdev_read_iter+0x2a4/0x530
do_iter_readv_writev+0x2f2/0x3c0
? generic_copy_file_range+0x1d0/0x1d0
? fsnotify_perm.part.0+0x25d/0x630
? security_file_permission+0xd8/0x100
do_iter_read+0x31b/0x880
? import_iovec+0x10b/0x140
vfs_readv+0x12d/0x1a0
? vfs_iter_read+0xb0/0xb0
? rcu_is_watching+0x12/0xb0
? rcu_is_watching+0x12/0xb0
? lock_release+0x4b7/0x670
do_preadv+0x1b3/0x260
? do_readv+0x370/0x370
__x64_sys_preadv2+0xef/0x150
do_syscall_64+0x39/0xb0
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f5af41ad806
Code: 41 54 41 89 fc 55 44 89 c5 53 48 89 cb 48 83 ec 18 80 3d e4 dd 0d 00 00 74 7a 45 89 c1 49 89 ca 45 31 c0 b8 47 01 00 00 0f 05 <48> 3d 00 f0 ff ff 0f 87 be 00 00 00 48 85 c0 79 4a 48 8b 0d da 55
RSP: 002b:00007ffd3145c7f0 EFLAGS: 00000246 ORIG_RAX: 0000000000000147
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f5af41ad806
RDX: 0000000000000001 RSI: 00007ffd3145c850 RDI: 0000000000000003
RBP: 0000000000000008 R08: 0000000000000000 R09: 0000000000000008
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003
R13: 00007ffd3145c850 R14: 000055f5f0431dd8 R15: 0000000000000001
</TASK>
where in fact it is dm itself that attempts to allocate a bio clone with
GFP_NOIO under the rcu read lock, regardless of the request type.
Fix this by getting rid of the special casing for REQ_NOWAIT, and just
use the normal SRCU protected table lookup. Get rid of the bio based
table locking helpers at the same time, as they are now unused.
Cc: stable@vger.kernel.org
Fixes: 563a225c9f ("dm: introduce dm_{get,put}_live_table_bio called from dm_submit_bio")
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Mike Snitzer <snitzer@kernel.org>
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Merge tag 'selinux-pr-20230914' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux
Pull selinux fix from Paul Moore:
"A relatively small SELinux patch to fix an issue with a
vfs/LSM/SELinux patch that went upstream during the recent merge
window.
The short version is that the original patch changed how we
initialized mount options to resolve a NFS issue and we inadvertently
broke a use case due to the changed behavior.
The fix restores this behavior for the cases that require it while
keeping the original NFS fix in place"
* tag 'selinux-pr-20230914' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux:
selinux: fix handling of empty opts in selinux_fs_context_submount()
* A fix to align kexec'd kernels to PMD boundries.
* The T-Head dcache.cva encoding was incorrect, it has been fixed to
invalidate all caches (as opposed to just the L1).
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Merge tag 'riscv-for-linus-6.6-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux
Pull RISC-V fixes from Palmer Dabbelt:
- A fix to align kexec'd kernels to PMD boundries
- The T-Head dcache.cva encoding was incorrect, it has been fixed to
invalidate all caches (as opposed to just the L1)
* tag 'riscv-for-linus-6.6-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
riscv: errata: fix T-Head dcache.cva encoding
riscv: kexec: Align the kexeced kernel entry
Commit:
5a5d7e9bad ("cpuidle: lib/bug: Disable rcu_is_watching() during WARN/BUG")
amended warn_slowpath_fmt() to disable preemption until the WARN splat
has been emitted.
However the commit neglected to reenable preemption in the !fmt codepath,
i.e. when a WARN splat is emitted without additional format string.
One consequence is that users may see more splats than intended. E.g. a
WARN splat emitted in a work item results in at least two extra splats:
BUG: workqueue leaked lock or atomic
(emitted by process_one_work())
BUG: scheduling while atomic
(emitted by worker_thread() -> schedule())
Ironically the point of the commit was to *avoid* extra splats. ;)
Fix it.
Fixes: 5a5d7e9bad ("cpuidle: lib/bug: Disable rcu_is_watching() during WARN/BUG")
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Paul E. McKenney <paulmck@kernel.org>
Link: https://lore.kernel.org/r/3ec48fde01e4ee6505f77908ba351bad200ae3d1.1694763684.git.lukas@wunner.de
Minor cleanup pointed out by checkpatch (repeated words, missing blank
lines) in smb2pdu.c and old header location referred to in transport.c
Signed-off-by: Steve French <stfrench@microsoft.com>
checkpatch flagged a few places with:
WARNING: ENOTSUPP is not a SUSV4 error code, prefer EOPNOTSUPP
Also fixed minor typo
Signed-off-by: Steve French <stfrench@microsoft.com>
When a CRC error occurs, the HBA asserts an interrupt to indicate an
interface fatal error (PxIS.IFS). The ISR clears PxIE and PxIS, then
does error recovery. If the adapter receives another SDB FIS
with an error (PxIS.TFES) from the device before the start of the EH
recovery process, the interrupt signaling the new SDB cannot be
serviced as PxIE was cleared already. This in turn results in the HBA
inability to issue any command during the error recovery process after
setting PxCMD.ST to 1 because PxIS.TFES is still set.
According to AHCI 1.3.1 specifications section 6.2.2, fatal errors
notified by setting PxIS.HBFS, PxIS.HBDS, PxIS.IFS or PxIS.TFES will
cause the HBA to enter the ERR:Fatal state. In this state, the HBA
shall not issue any new commands.
To avoid this situation, introduce the function
ahci_port_clear_pending_irq() to clear pending interrupts before
executing a COMRESET. This follows the AHCI 1.3.1 - section 6.2.2.2
specification.
Signed-off-by: Szuying Chen <Chloe_Chen@asmedia.com.tw>
Fixes: e0bfd14997 ("[PATCH] ahci: stop engine during hard reset")
Cc: stable@vger.kernel.org
Reviewed-by: Niklas Cassel <niklas.cassel@wdc.com>
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
