From QPIC V2 onwards there is a separate register to read
last code word "QPIC_NAND_READ_LOCATION_LAST_CW_n".
qcom_nandc_read_cw_raw() is used to read only one code word
at a time. If we will configure number of code words to 1 in
in QPIC_NAND_DEV0_CFG0 register then QPIC controller thinks
its reading the last code word, since from QPIC V2 onwards
we are having separate register to read the last code word,
we have to configure "QPIC_NAND_READ_LOCATION_LAST_CW_n"
register to fetch data from controller buffer to system
memory.
Fixes: 503ee5aad4 ("mtd: rawnand: qcom: update last code word register")
Cc: stable@kernel.org
Signed-off-by: Md Sadre Alam <mdalam@codeaurora.org>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/1630998357-1359-1-git-send-email-mdalam@codeaurora.org
Merge more updates from Andrew Morton:
"147 patches, based on 7d2a07b769.
Subsystems affected by this patch series: mm (memory-hotplug, rmap,
ioremap, highmem, cleanups, secretmem, kfence, damon, and vmscan),
alpha, percpu, procfs, misc, core-kernel, MAINTAINERS, lib,
checkpatch, epoll, init, nilfs2, coredump, fork, pids, criu, kconfig,
selftests, ipc, and scripts"
* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (94 commits)
scripts: check_extable: fix typo in user error message
mm/workingset: correct kernel-doc notations
ipc: replace costly bailout check in sysvipc_find_ipc()
selftests/memfd: remove unused variable
Kconfig.debug: drop selecting non-existing HARDLOCKUP_DETECTOR_ARCH
configs: remove the obsolete CONFIG_INPUT_POLLDEV
prctl: allow to setup brk for et_dyn executables
pid: cleanup the stale comment mentioning pidmap_init().
kernel/fork.c: unexport get_{mm,task}_exe_file
coredump: fix memleak in dump_vma_snapshot()
fs/coredump.c: log if a core dump is aborted due to changed file permissions
nilfs2: use refcount_dec_and_lock() to fix potential UAF
nilfs2: fix memory leak in nilfs_sysfs_delete_snapshot_group
nilfs2: fix memory leak in nilfs_sysfs_create_snapshot_group
nilfs2: fix memory leak in nilfs_sysfs_delete_##name##_group
nilfs2: fix memory leak in nilfs_sysfs_create_##name##_group
nilfs2: fix NULL pointer in nilfs_##name##_attr_release
nilfs2: fix memory leak in nilfs_sysfs_create_device_group
trap: cleanup trap_init()
init: move usermodehelper_enable() to populate_rootfs()
...
HZ unit conversion macros are available in units.h, use them and remove
the duplicate definition.
Link: https://lkml.kernel.org/r/20210816114732.1834145-10-daniel.lezcano@linaro.org
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Miquel Raynal <miquel.raynal@bootlin.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Chanwoo Choi <cw00.choi@samsung.com>
Cc: Christian Eggers <ceggers@arri.de>
Cc: Guenter Roeck <linux@roeck-us.net>
Cc: Jonathan Cameron <jic23@kernel.org>
Cc: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Lars-Peter Clausen <lars@metafoo.de>
Cc: Lukasz Luba <lukasz.luba@arm.com>
Cc: Maxime Coquelin <mcoquelin.stm32@gmail.com>
Cc: MyungJoo Ham <myungjoo.ham@samsung.com>
Cc: Peter Meerwald <pmeerw@pmeerw.net>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>
Cc: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* blkdevs:
- Simplify the refcounting in blktrans_{open, release}
- Simplify blktrans_getgeo
- Remove blktrans_ref_mutex
- Simplify blktrans_dev_get
- Use lockdep_assert_held
- Don't hold del_mtd_blktrans_dev in blktrans_{open, release}
* ftl:
- Don't cast away the type when calling add_mtd_blktrans_dev
- Don't cast away the type when calling add_mtd_blktrans_dev
- Use container_of() rather than cast
- Fix use-after-free
- Add discard support
- Allow use of MTD_RAM for testing purposes
* concat:
- Check _read, _write callbacks existence before assignment
- Judge callback existence based on the master
* maps:
- Maps: remove dead MTD map driver for PMC-Sierra MSP boards
* mtdblock:
- Warn if added for a NAND device
- Add comment about UBI block devices
- Update old JFFS2 mention in Kconfig
* partitions:
- Redboot: convert to YAML
NAND core changes:
* Repair Miquel Raynal's email address in MAINTAINERS
* Fix a couple of spelling mistakes in Kconfig
* bbt: Skip bad blocks when searching for the BBT in NAND
* Remove never changed ret variable
Raw NAND changes:
* cafe: Fix a resource leak in the error handling path of 'cafe_nand_probe()'
* intel: Fix error handling in probe
* omap: Fix kernel doc warning on 'calcuate' typo
* gpmc: Fix the ECC bytes vs. OOB bytes equation
SPI-NAND core changes:
* Properly fill the OOB area.
* Fix comment
SPI-NAND drivers changes:
* macronix: Add Quad support for serial NAND flash
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Merge tag 'mtd/for-5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux
Pull MTD updates from Miquel Raynal:
"MTD changes:
- blkdevs:
- Simplify the refcounting in blktrans_{open, release}
- Simplify blktrans_getgeo
- Remove blktrans_ref_mutex
- Simplify blktrans_dev_get
- Use lockdep_assert_held
- Don't hold del_mtd_blktrans_dev in blktrans_{open, release}
- ftl:
- Don't cast away the type when calling add_mtd_blktrans_dev
- Don't cast away the type when calling add_mtd_blktrans_dev
- Use container_of() rather than cast
- Fix use-after-free
- Add discard support
- Allow use of MTD_RAM for testing purposes
- concat:
- Check _read, _write callbacks existence before assignment
- Judge callback existence based on the master
- maps:
- Maps: remove dead MTD map driver for PMC-Sierra MSP boards
- mtdblock:
- Warn if added for a NAND device
- Add comment about UBI block devices
- Update old JFFS2 mention in Kconfig
- partitions:
- Redboot: convert to YAML
NAND core changes:
- Repair Miquel Raynal's email address in MAINTAINERS
- Fix a couple of spelling mistakes in Kconfig
- bbt: Skip bad blocks when searching for the BBT in NAND
- Remove never changed ret variable
Raw NAND changes:
- cafe: Fix a resource leak in the error handling path of 'cafe_nand_probe()'
- intel: Fix error handling in probe
- omap: Fix kernel doc warning on 'calcuate' typo
- gpmc: Fix the ECC bytes vs. OOB bytes equation
SPI-NAND core changes:
- Properly fill the OOB area.
- Fix comment
SPI-NAND drivers changes:
- macronix: Add Quad support for serial NAND flash"
* tag 'mtd/for-5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux: (30 commits)
mtd: rawnand: cafe: Fix a resource leak in the error handling path of 'cafe_nand_probe()'
mtd_blkdevs: simplify the refcounting in blktrans_{open, release}
mtd_blkdevs: simplify blktrans_getgeo
mtd_blkdevs: remove blktrans_ref_mutex
mtd_blkdevs: simplify blktrans_dev_get
mtd/rfd_ftl: don't cast away the type when calling add_mtd_blktrans_dev
mtd/ftl: don't cast away the type when calling add_mtd_blktrans_dev
mtd_blkdevs: use lockdep_assert_held
mtd_blkdevs: don't hold del_mtd_blktrans_dev in blktrans_{open, release}
mtd: rawnand: intel: Fix error handling in probe
mtd: mtdconcat: Check _read, _write callbacks existence before assignment
mtd: mtdconcat: Judge callback existence based on the master
mtd: maps: remove dead MTD map driver for PMC-Sierra MSP boards
mtd: rfd_ftl: use container_of() rather than cast
mtd: rfd_ftl: fix use-after-free
mtd: rfd_ftl: add discard support
mtd: rfd_ftl: allow use of MTD_RAM for testing purposes
mtdblock: Warn if added for a NAND device
mtd: spinand: macronix: Add Quad support for serial NAND flash
mtdblock: Add comment about UBI block devices
...
* Repair Miquel Raynal's email address in MAINTAINERS
* Fix a couple of spelling mistakes in Kconfig
* bbt: Skip bad blocks when searching for the BBT in NAND
* Remove never changed ret variable
Raw NAND changes:
* cafe: Fix a resource leak in the error handling path of 'cafe_nand_probe()'
* intel: Fix error handling in probe
* omap: Fix kernel doc warning on 'calcuate' typo
* gpmc: Fix the ECC bytes vs. OOB bytes equation
SPI-NAND core changes:
* Properly fill the OOB area.
* Fix comment
SPI-NAND drivers changes:
* macronix: Add Quad support for serial NAND flash
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Merge tag 'nand/for-5.15' into mtd/next
NAND core changes:
* Repair Miquel Raynal's email address in MAINTAINERS
* Fix a couple of spelling mistakes in Kconfig
* bbt: Skip bad blocks when searching for the BBT in NAND
* Remove never changed ret variable
Raw NAND changes:
* cafe: Fix a resource leak in the error handling path of 'cafe_nand_probe()'
* intel: Fix error handling in probe
* omap: Fix kernel doc warning on 'calcuate' typo
* gpmc: Fix the ECC bytes vs. OOB bytes equation
SPI-NAND core changes:
* Properly fill the OOB area.
* Fix comment
SPI-NAND drivers changes:
* macronix: Add Quad support for serial NAND flash
A successful 'init_rs_non_canonical()' call should be balanced by a
corresponding 'free_rs()' call in the error handling path of the probe, as
already done in the remove function.
Update the error handling path accordingly.
Fixes: 8c61b7a7f4 ("[MTD] [NAND] Use rslib for CAFÉ ECC")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/fd313d3fb787458bcc73189e349f481133a2cdc9.1629532640.git.christophe.jaillet@wanadoo.fr
Always grab a reference to the mtd_blktrans_dev in ->open instead of
just on the first open, and do away with the additional temporary
references in ->open and ->release.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20210823073359.705281-9-hch@lst.de
No need to grab a mtd_blktrans_dev given that ->open already holds one
and ->getgeo can only be called on an open disk.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20210823073359.705281-8-hch@lst.de
blktrans_ref_mutex is not actually needed. The kref is serialized
internally, and devnum assignment in add_mtd_blktrans_dev happens before
the disk is added and thus any of the block_device_operations methods
otherwise using it are called. It is also already serialized by the
global mtd_table_mutex.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20210823073359.705281-7-hch@lst.de
->private_data is set before the disk is added and never cleared, so don't
bother trying to handle a NULL pointer there.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20210823073359.705281-6-hch@lst.de
There is nothing that this protects against except for slightly reducing
the window when new opens can appear just before calling del_gendisk.
Reported-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Tested-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20210823073359.705281-2-hch@lst.de
ebu_nand_probe() did not invoke ebu_dma_cleanup() and
clk_disable_unprepare() on some error handling paths. The patch fixes
that.
Found by Linux Driver Verification project (linuxtesting.org).
Fixes: 0b1039f016 ("mtd: rawnand: Add NAND controller support on Intel LGM SoC")
Signed-off-by: Evgeny Novikov <novikov@ispras.ru>
Co-developed-by: Kirill Shilimanov <kirill.shilimanov@huawei.com>
Signed-off-by: Kirill Shilimanov <kirill.shilimanov@huawei.com>
Co-developed-by: Anton Vasilyev <vasilyev@ispras.ru>
Signed-off-by: Anton Vasilyev <vasilyev@ispras.ru>
Cc: stable@vger.kernel.org
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20210817092930.23040-1-novikov@ispras.ru
Since 2431c4f5b4 ("mtd: Implement mtd_{read,write}() as wrappers
around mtd_{read,write}_oob()") don't allow _write|_read and
_write_oob|_read_oob existing at the same time, we should check the
existence of callbacks "_read and _write" from subdev's master device
(We can trust master device since it has been registered) before
assigning, otherwise following warning occurs while making
concatenated device:
WARNING: CPU: 2 PID: 6728 at drivers/mtd/mtdcore.c:595
add_mtd_device+0x7f/0x7b0
Fixes: 2431c4f5b4 ("mtd: Implement mtd_{read,write}() around ...")
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20210817114857.2784825-3-chengzhihao1@huawei.com
Since commit 46b5889cc2c5("mtd: implement proper partition handling")
applied, mtd partition device won't hold some callback functions, such
as _block_isbad, _block_markbad, etc. Besides, function mtd_block_isbad()
will get mtd device's master mtd device, then invokes master mtd device's
callback function. So, following process may result mtd_block_isbad()
always return 0, even though mtd device has bad blocks:
1. Split a mtd device into 3 partitions: PA, PB, PC
[ Each mtd partition device won't has callback function _block_isbad(). ]
2. Concatenate PA and PB as a new mtd device PN
[ mtd_concat_create() finds out each subdev has no callback function
_block_isbad(), so PN won't be assigned callback function
concat_block_isbad(). ]
Then, mtd_block_isbad() checks "!master->_block_isbad" is true, will
always return 0.
Reproducer:
// reproduce.c
static int __init init_diy_module(void)
{
struct mtd_info *mtd[2];
struct mtd_info *mtd_combine = NULL;
mtd[0] = get_mtd_device_nm("NAND simulator partition 0");
if (!mtd[0]) {
pr_err("cannot find mtd1\n");
return -EINVAL;
}
mtd[1] = get_mtd_device_nm("NAND simulator partition 1");
if (!mtd[1]) {
pr_err("cannot find mtd2\n");
return -EINVAL;
}
put_mtd_device(mtd[0]);
put_mtd_device(mtd[1]);
mtd_combine = mtd_concat_create(mtd, 2, "Combine mtd");
if (mtd_combine == NULL) {
pr_err("combine failed\n");
return -EINVAL;
}
mtd_device_register(mtd_combine, NULL, 0);
pr_info("Combine success\n");
return 0;
}
1. ID="0x20,0xac,0x00,0x15"
2. modprobe nandsim id_bytes=$ID parts=50,100 badblocks=100
3. insmod reproduce.ko
4. flash_erase /dev/mtd3 0 0
libmtd: error!: MEMERASE64 ioctl failed for eraseblock 100 (mtd3)
error 5 (Input/output error)
// Should be "flash_erase: Skipping bad block at 00c80000"
Fixes: 46b5889cc2 ("mtd: implement proper partition handling")
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20210817114857.2784825-2-chengzhihao1@huawei.com
Commit 1b00767fd8 ("MIPS: Remove PMC MSP71xx platform") removes the
config PMC_MSP in ./arch/mips/Kconfig.
Hence, since then, the corresponding MTD map driver for PMC-Sierra MSP
boards is dead code. Remove this dead driver.
Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20210817104531.12675-1-lukas.bulwahn@gmail.com
del_mtd_blktrans_dev() will kfree part, so after this call both part and
dev point to freed memory. Move the call to avoid use-after-free.
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20210807214538.14484-5-sean@mess.org
I proposed this change 16 years ago before discard was a feature in
the block layer: https://lwn.net/Articles/162776/
Now that the block layer has discard, we can finally merge this change.
Discard is also known as trim. By implementing discard, both fstrim and
the discard filesystem option can be used.
Implementing discard in the ftl means that when files are removed, there
is less data in the ftl mapping. This means less stuff to move around for
erasing and also less erasing to do; this means improved wear levelling
and improved performance.
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20210807214538.14484-3-sean@mess.org
This allows the rfd_ftl to be used with the mtdram module, so we can
test different mtd sizes and test the rfd_ftl on machines without a
physical nor flash device.
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20210807214538.14484-2-sean@mess.org
There is a surprisingly large number of tutorials
that suggest using mtdblock to mount SquashFS filesystems
on flash devices, including NAND devices.
This approach is suboptimal than using UBI. If the flash device
is NAND, this is specially true, due to wear leveling, bit-flips and
badblocks. In this case UBI is strongly preferred, so be nice to users
and print a warning suggesting to consider UBI block, if mtdblock
is added for a NAND device.
Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20210801234509.18774-8-ezequiel@collabora.com
Adding FLAG "SPINAND_HAS_QE_BIT" for Quad mode support on Macronix
Serial Flash.
Validated via normal(default) and QUAD mode by read, erase, read back,
on Xilinx Zynq PicoZed FPGA board which included Macronix
SPI Host(drivers/spi/spi-mxic.c).
Signed-off-by: Jaime Liao <jaimeliao@mxic.com.tw>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/1628472472-32008-1-git-send-email-jaimeliao@mxic.com.tw
There is a surprisingly large number of tutorials
that suggest using mtdblock to mount SquashFS filesystems
on flash devices, including NAND devices.
Given this approach is suboptimal than using UBI, and given
the UBI block device layer was introduced many years ago
specifically with this use case in mind, add a small
comment inviting users and developers to consider UBI block.
Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20210801234509.18774-7-ezequiel@collabora.com
JFFS2 can be mounted without 'mtdblock' since
a really, really long time. Some git-log
archaeology shows that in 2006 it was possible
to use 'root=' to mount a JFFS2 rootfs:
commit e9482b4374
Author: Joern Engel <joern@wh.fh-wedel.de>
Date: Tue May 30 14:25:46 2006 +0200
[MTD] Allow alternate JFFS2 mount variant for root filesystem.
With this patch, "root=mtd3" and "root=mtd:foo" work for a JFFS2 rootfs.
However, there are still plenty of tutorials that mention
mtdblock, so users are still taking this route. Update the Kconfig
to reflect this is no longer needed.
Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20210801234509.18774-6-ezequiel@collabora.com
The ret variable used for returning value in the function
`meson_nfc_rw_cmd_prepare_and_execute` is never change after initialising.
Therefore, we can remove it safely and return 0 at the end of the function.
Signed-off-by: Jason Wang <wangborong@cdjrlc.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20210803113300.24230-1-wangborong@cdjrlc.com
Fix a trivial typo which is reported after enabling W=1 level of warnings:
drivers/mtd/nand/raw/omap2.c:927: warning: expecting prototype
for omap_calcuate_ecc(). Prototype was for omap_calculate_ecc() instead
Signed-off-by: Vladimir Molokov <vladimir@molokov.se>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20210801205909.7102-1-vladimir@molokov.se
The comment in spinand_write_to_cache_op() says that
spinand_ondie_ecc_prepare_io_req() should 0xff fill the OOB
area but it doesn't.
This causes the OOB area to get filled with zeros
and anytime the first page in a block the bad block marker
is cleared and it becomes a bad block on the next boot.
This was observed on Longsys FORSEE branded parts and
might be specific to these parts.
Signed-off-by: Daniel Palmer <daniel@0x0f.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20210617110842.2358461-1-daniel@0x0f.com
Due to 14f97f0b8e, the rawnand platforms without "secure-regions"
property defined in DT fails to probe. The issue is,
of_get_nand_secure_regions() errors out if
of_property_count_elems_of_size() returns a negative error code.
If the "secure-regions" property is not present in DT, then also we'll
get -EINVAL from of_property_count_elems_of_size() but it should not
be treated as an error for platforms not declaring "secure-regions"
in DT.
So fix this behaviour by checking for the existence of that property in
DT and return 0 if it is not present.
Fixes: 14f97f0b8e ("mtd: rawnand: Add a check in of_get_nand_secure_regions()")
Reported-by: Martin Kaiser <martin@kaiser.cx>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Reviewed-by: Martin Kaiser <martin@kaiser.cx>
Tested-by: Martin Kaiser <martin@kaiser.cx>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20210727062813.32619-1-manivannan.sadhasivam@linaro.org
There is a lock hierarchy of major_names_lock --> mtd_table_mutex. One
existing chain is as follows:
1. major_names_lock --> loop_ctl_mutex (when blk_request_module calls
loop_probe)
2. loop_ctl_mutex --> bdev->bd_mutex (when loop_control_ioctl calls
loop_remove, which then calls del_gendisk)
3. bdev->bd_mutex --> mtd_table_mutex (when blkdev_get_by_dev calls
__blkdev_get, which then calls blktrans_open)
Since unregister_blkdev grabs the major_names_lock, we need to call it
outside the critical section for mtd_table_mutex, otherwise we invert
the lock hierarchy.
Reported-by: Hillf Danton <hdanton@sina.com>
Signed-off-by: Desmond Cheong Zhi Xi <desmondcheongzx@gmail.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20210717100719.728829-1-desmondcheongzx@gmail.com
The allocation for cmd is not being kfree'd on the return leading to
a memory leak. Fix this by kfree'ing it.
Addresses-Coverity: ("Resource leak")
Fixes: 88d1250267 ("mtd: devices: add support for microchip 48l640 EERAM")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Reviewed-by: Heiko Schocher <hs@denx.de>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20210712145214.101377-1-colin.king@canonical.com
The blocks containing the bad block table can become bad as well. So
make sure to skip any blocks that are marked bad when searching for the
bad block table.
Otherwise in very rare cases where two BBT blocks wear out it might
happen that an obsolete BBT is used instead of a newer available
version.
This only applies to drivers which make use of a bad block marker in flash.
Other drivers won't be able to identify bad BBT blocks and thus can't skip
these.
Signed-off-by: Stefan Riedmueller <s.riedmueller@phytec.de>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20210625123821.207458-1-s.riedmueller@phytec.de
Erasing an AMD linear flash card (AM29F016D) crashes after the first
sector has been erased. Likewise, writing to it crashes after two bytes
have been written. The reason is a missing check for a null pointer -
the cmdset_priv field is not set for this type of card.
Fixes: 4844ef8030 ("mtd: cfi_cmdset_0002: Add support for polling status register")
Signed-off-by: Andreas Persson <andreasp56@outlook.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/DB6P189MB05830B3530B8087476C5CFE4C1159@DB6P189MB0583.EURP189.PROD.OUTLOOK.COM
There are flash drivers which registers the OTP callbacks although the
flash doesn't support OTP regions and return -ENODATA for these
callbacks if there is no OTP. If this happens, the probe of the whole
flash will fail. Fix it by handling the ENODATA return code and skip
the OTP region nvmem setup.
Fixes: 4b361cfa86 ("mtd: core: add OTP nvmem provider support")
Reported-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Michael Walle <michael@walle.cc>
Tested-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20210707135359.32398-1-michael@walle.cc
Smatch complains that zero length read/writes will lead to an
uninitalized return value. I don't know if that's possible, but
it's nicer to return a zero literal anyway so let's do that.
Fixes: 88d1250267 ("mtd: devices: add support for microchip 48l640 EERAM")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
Reviewed-by: Heiko Schocher <hs@denx.de>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/YMyir961W28TX5dT@mwanda
Syzbot reported a circular locking dependency:
https://syzkaller.appspot.com/bug?id=7bd106c28e846d1023d4ca915718b1a0905444cb
This happens because of the following lock dependencies:
1. loop_ctl_mutex -> bdev->bd_mutex (when loop_control_ioctl calls
loop_remove, which then calls del_gendisk; this also happens in
loop_exit which eventually calls loop_remove)
2. bdev->bd_mutex -> mtd_table_mutex (when blkdev_get_by_dev calls
__blkdev_get, which then calls blktrans_open)
3. mtd_table_mutex -> major_names_lock (when register_mtd_blktrans
calls __register_blkdev)
4. major_names_lock -> loop_ctl_mutex (when blk_request_module calls
loop_probe)
Hence there's an overall dependency of:
loop_ctl_mutex ----------> bdev->bd_mutex
^ |
| |
| v
major_names_lock <--------- mtd_table_mutex
We can break this circular dependency by holding mtd_table_mutex only
for the required critical section in register_mtd_blktrans. This
avoids the mtd_table_mutex -> major_names_lock dependency.
Reported-and-tested-by: syzbot+6a8a0d93c91e8fbf2e80@syzkaller.appspotmail.com
Co-developed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Desmond Cheong Zhi Xi <desmondcheongzx@gmail.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20210617160904.570111-1-desmondcheongzx@gmail.com
Check for whether of_property_count_elems_of_size() returns a negative
error code.
Fixes: 13b8976827 ("mtd: rawnand: Add support for secure regions in NAND memory")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Manivannan Sadhasivam <mani@kernel.org>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/YMtQFXE0F1w7mUh+@mwanda
- Fix for a race xattr list and modification
- Various minor fixes (spelling, return codes, ...)
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Merge tag 'for-linus-5.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/ubifs
Pull UBIFS updates from Richard Weinberger:
- Fix for a race xattr list and modification
- Various minor fixes (spelling, return codes, ...)
* tag 'for-linus-5.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/ubifs:
ubifs: Set/Clear I_LINKABLE under i_lock for whiteout inode
ubifs: Fix spelling mistakes
ubifs: Remove ui_mutex in ubifs_xattr_get and change_xattr
ubifs: Fix races between xattr_{set|get} and listxattr operations
ubifs: fix snprintf() checking
ubifs: journal: Fix error return code in ubifs_jnl_write_inode()
* Convert list_for_each to entry variant
* Use MTD_DEVICE_ATTR_RO/RW() helper macros
* Remove unnecessary OOM messages
* Potential NULL dereference in mtd_otp_size()
* Fix freeing of otp_info buffer
* Create partname and partid debug files for child MTDs
* tests:
- Remove redundant assignment to err
- Fix error return code in mtd_oobtest_init()
* Add OTP NVMEM provider support
* Allow specifying of_node
* Convert sysfs sprintf/snprintf family to sysfs_emit
Bindings changes:
* Convert ti,am654-hbmc.txt to YAML schema
* spi-nor: add otp property
* Add OTP bindings
* add YAML schema for the generic MTD bindings
* Add brcm,trx-magic
MTD device drivers changes:
* Add support for microchip 48l640 EERAM
* Remove superfluous "break"
* sm_ftl:
- Fix alignment of block comment
* nftl:
- Return -ENOMEM when kmalloc failed
* nftlcore:
- Remove set but rewrite variables
* phram:
- Fix error return code in phram_setup()
* plat-ram:
- Remove redundant dev_err call in platram_probe()
MTD parsers changes:
* Qcom:
- Fix leaking of partition name
* Redboot:
- Fix style issues
- Seek fis-index-block in the right node
* trx:
- Allow to use TRX parser on Mediatek SoCs
- Allow to specify brcm, trx-magic in DT
Raw NAND core:
* Allow SDR timings to be nacked
* Bring support for NV-DDR timings which involved a number of small
preparation changes to bring new helpers, properly introduce NV-DDR
structures, fill them, differenciate them and pick the best timing set.
* Add the necessary infrastructure to parse the new gpio-cs property
which aims at enlarging the number of available CS when a hardware
controller is too constrained.
* Update dead URL
* Silence static checker warning in nand_setup_interface()
* BBT:
- Fix corner case in bad block table handling
* onfi:
- Use more recent ONFI specification wording
- Use the BIT() macro when possible
Raw NAND controller drivers:
* Atmel:
- Ensure the data interface is supported.
* Arasan:
- Finer grain NV-DDR configuration
- Rename the data interface register
- Use the right DMA mask
- Leverage additional GPIO CS
- Ensure proper configuration for the asserted target
- Add support for the NV-DDR interface
- Fix a macro parameter
* brcmnand:
- Convert bindings to json-schema
* OMAP:
- Various fixes and style improvements
- Add larger page NAND chips support
* PL35X:
- New driver
* QCOM:
- Avoid writing to obsolete register
- Delete an unneeded bool conversion
- Allow override of partition parser
* Marvell:
- Minor documentation correction
- Add missing clk_disable_unprepare() on error in marvell_nfc_resume()
* R852:
- Use DEVICE_ATTR_RO() helper macro
* MTK:
- Remove redundant dev_err call in mtk_ecc_probe()
* HISI504:
- Remove redundant dev_err call in probe
SPI-NAND core:
* Light reorganisation for the introduction of a core resume handler
* Fix double counting of ECC stats
SPI-NAND manufacturer drivers:
* Macronix:
- Add support for serial NAND flash
SPI NOR core changes:
* Ability to dump SFDP tables via sysfs
* Support for erasing OTP regions on Winbond and similar flashes
* Few API doc updates and fixes
* Locking support for MX25L12805D
SPI NOR controller drivers changes:
* Use SPI_MODE_X_MASK in nxp-spifi
* Intel Alder Lake-M SPI serial flash support
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Merge tag 'mtd/for-5.14' of git://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux
Pull MTD updates from Richard Weinberger:
"MTD core changes:
- Convert list_for_each to entry variant
- Use MTD_DEVICE_ATTR_RO/RW() helper macros
- Remove unnecessary OOM messages
- Potential NULL dereference in mtd_otp_size()
- Fix freeing of otp_info buffer
- Create partname and partid debug files for child MTDs
- tests:
- Remove redundant assignment to err
- Fix error return code in mtd_oobtest_init()
- Add OTP NVMEM provider support
- Allow specifying of_node
- Convert sysfs sprintf/snprintf family to sysfs_emit
Bindings changes:
- Convert ti,am654-hbmc.txt to YAML schema
- spi-nor: add otp property
- Add OTP bindings
- add YAML schema for the generic MTD bindings
- Add brcm,trx-magic
MTD device drivers changes:
- Add support for microchip 48l640 EERAM
- Remove superfluous "break"
- sm_ftl:
- Fix alignment of block comment
- nftl:
- Return -ENOMEM when kmalloc failed
- nftlcore:
- Remove set but rewrite variables
- phram:
- Fix error return code in phram_setup()
- plat-ram:
- Remove redundant dev_err call in platram_probe()
MTD parsers changes:
- Qcom:
- Fix leaking of partition name
- Redboot:
- Fix style issues
- Seek fis-index-block in the right node
- trx:
- Allow to use TRX parser on Mediatek SoCs
- Allow to specify brcm, trx-magic in DT
Raw NAND core:
- Allow SDR timings to be nacked
- Bring support for NV-DDR timings which involved a number of small
preparation changes to bring new helpers, properly introduce NV-DDR
structures, fill them, differenciate them and pick the best timing
set.
- Add the necessary infrastructure to parse the new gpio-cs property
which aims at enlarging the number of available CS when a hardware
controller is too constrained.
- Update dead URL
- Silence static checker warning in nand_setup_interface()
- BBT:
- Fix corner case in bad block table handling
- onfi:
- Use more recent ONFI specification wording
- Use the BIT() macro when possible
Raw NAND controller drivers:
- Atmel:
- Ensure the data interface is supported.
- Arasan:
- Finer grain NV-DDR configuration
- Rename the data interface register
- Use the right DMA mask
- Leverage additional GPIO CS
- Ensure proper configuration for the asserted target
- Add support for the NV-DDR interface
- Fix a macro parameter
- brcmnand:
- Convert bindings to json-schema
- OMAP:
- Various fixes and style improvements
- Add larger page NAND chips support
- PL35X:
- New driver
- QCOM:
- Avoid writing to obsolete register
- Delete an unneeded bool conversion
- Allow override of partition parser
- Marvell:
- Minor documentation correction
- Add missing clk_disable_unprepare() on error in
marvell_nfc_resume()
- R852:
- Use DEVICE_ATTR_RO() helper macro
- MTK:
- Remove redundant dev_err call in mtk_ecc_probe()
- HISI504:
- Remove redundant dev_err call in probe
SPI-NAND core:
- Light reorganisation for the introduction of a core resume handler
- Fix double counting of ECC stats
SPI-NAND manufacturer drivers:
- Macronix:
- Add support for serial NAND flash
SPI NOR core changes:
- Ability to dump SFDP tables via sysfs
- Support for erasing OTP regions on Winbond and similar flashes
- Few API doc updates and fixes
- Locking support for MX25L12805D
SPI NOR controller drivers changes:
- Use SPI_MODE_X_MASK in nxp-spifi
- Intel Alder Lake-M SPI serial flash support"
* tag 'mtd/for-5.14' of git://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux: (125 commits)
mtd: spi-nor: remove redundant continue statement
mtd: rawnand: omap: Add larger page NAND chips support
mtd: rawnand: omap: Various style fixes
mtd: rawnand: omap: Check return values
mtd: rawnand: omap: Rename a macro
mtd: rawnand: omap: Aggregate the HW configuration of the ELM
mtd: rawnand: pl353: Add support for the ARM PL353 SMC NAND controller
dt-bindings: mtd: pl353-nand: Describe this hardware controller
MAINTAINERS: Add PL353 NAND controller entry
mtd: rawnand: qcom: avoid writing to obsolete register
mtd: rawnand: marvell: Minor documentation correction
mtd: rawnand: r852: use DEVICE_ATTR_RO() helper macro
mtd: spinand: add SPI-NAND MTD resume handler
mtd: spinand: Add spinand_init_flash() helper
mtd: spinand: add spinand_read_cfg() helper
mtd: rawnand: marvell: add missing clk_disable_unprepare() on error in marvell_nfc_resume()
mtd: rawnand: arasan: Finer grain NV-DDR configuration
mtd: rawnand: arasan: Rename the data interface register
mtd: rawnand: onfi: Fix endianness when reading NV-DDR values
mtd: rawnand: arasan: Use the right DMA mask
...
- Ability to dump SFDP tables via sysfs
- Support for erasing OTP regions on Winbond and similar flashes
- Few API doc updates and fixes
- Locking support for MX25L12805D
SPI NOR controller drivers changes:
- Use SPI_MODE_X_MASK in nxp-spifi
- Intel Alder Lake-M SPI serial flash support
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Merge tag 'spi-nor/for-5.14' into mtd/next
SPI NOR core changes:
- Ability to dump SFDP tables via sysfs
- Support for erasing OTP regions on Winbond and similar flashes
- Few API doc updates and fixes
- Locking support for MX25L12805D
SPI NOR controller drivers changes:
- Use SPI_MODE_X_MASK in nxp-spifi
- Intel Alder Lake-M SPI serial flash support
* Allow SDR timings to be nacked
* Bring support for NV-DDR timings which involved a number of small
preparation changes to bring new helpers, properly introduce NV-DDR
structures, fill them, differenciate them and pick the best timing set.
* Add the necessary infrastructure to parse the new gpio-cs property
which aims at enlarging the number of available CS when a hardware
controller is too constrained.
* Update dead URL
* Silence static checker warning in nand_setup_interface()
* BBT:
- Fix corner case in bad block table handling
* onfi:
- Use more recent ONFI specification wording
- Use the BIT() macro when possible
Raw NAND controller drivers:
* Atmel:
- Ensure the data interface is supported.
* Arasan:
- Finer grain NV-DDR configuration
- Rename the data interface register
- Use the right DMA mask
- Leverage additional GPIO CS
- Ensure proper configuration for the asserted target
- Add support for the NV-DDR interface
- Fix a macro parameter
* brcmnand:
- Convert bindings to json-schema
* OMAP:
- Various fixes and style improvements
- Add larger page NAND chips support
* PL35X:
- New driver
* QCOM:
- Avoid writing to obsolete register
- Delete an unneeded bool conversion
- Allow override of partition parser
* Marvell:
- Minor documentation correction
- Add missing clk_disable_unprepare() on error in marvell_nfc_resume()
* R852:
- Use DEVICE_ATTR_RO() helper macro
* MTK:
- Remove redundant dev_err call in mtk_ecc_probe()
* HISI504:
- Remove redundant dev_err call in probe
SPI-NAND core:
* Light reorganisation for the introduction of a core resume handler
* Fix double counting of ECC stats
SPI-NAND manufacturer drivers:
* Macronix:
- Add support for serial NAND flash
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Merge tag 'nand/for-5.14' of git://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux into mtd/next
Raw NAND core:
* Allow SDR timings to be nacked
* Bring support for NV-DDR timings which involved a number of small
preparation changes to bring new helpers, properly introduce NV-DDR
structures, fill them, differenciate them and pick the best timing set.
* Add the necessary infrastructure to parse the new gpio-cs property
which aims at enlarging the number of available CS when a hardware
controller is too constrained.
* Update dead URL
* Silence static checker warning in nand_setup_interface()
* BBT:
- Fix corner case in bad block table handling
* onfi:
- Use more recent ONFI specification wording
- Use the BIT() macro when possible
Raw NAND controller drivers:
* Atmel:
- Ensure the data interface is supported.
* Arasan:
- Finer grain NV-DDR configuration
- Rename the data interface register
- Use the right DMA mask
- Leverage additional GPIO CS
- Ensure proper configuration for the asserted target
- Add support for the NV-DDR interface
- Fix a macro parameter
* brcmnand:
- Convert bindings to json-schema
* OMAP:
- Various fixes and style improvements
- Add larger page NAND chips support
* PL35X:
- New driver
* QCOM:
- Avoid writing to obsolete register
- Delete an unneeded bool conversion
- Allow override of partition parser
* Marvell:
- Minor documentation correction
- Add missing clk_disable_unprepare() on error in marvell_nfc_resume()
* R852:
- Use DEVICE_ATTR_RO() helper macro
* MTK:
- Remove redundant dev_err call in mtk_ecc_probe()
* HISI504:
- Remove redundant dev_err call in probe
SPI-NAND core:
* Light reorganisation for the introduction of a core resume handler
* Fix double counting of ECC stats
SPI-NAND manufacturer drivers:
* Macronix:
- Add support for serial NAND flash
Use normal block device I/O path for pstore/blk. (Christoph Hellwig,
Kees Cook, Pu Lehui)
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Merge tag 'pstore-v5.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux
Pull pstore updates from Kees Cook:
"Use normal block device I/O path for pstore/blk. (Christoph Hellwig,
Kees Cook, Pu Lehui)"
* tag 'pstore-v5.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
pstore/blk: Include zone in pstore_device_info
pstore/blk: Fix kerndoc and redundancy on blkdev param
pstore/blk: Use the normal block device I/O path
pstore/blk: Move verify_size() macro out of function
pstore/blk: Improve failure reporting
