There is no point in accessing the HW when writing to any of the
ISPENDR/ICPENDR registers from userspace, as only the guest should
be allowed to change the HW state.
Introduce new userspace-specific accessors that deal solely with
the virtual state. Note that the API differs from that of GICv3,
where userspace exclusively uses ISPENDR to set the state. Too
bad we can't reuse it.
Fixes: 82e40f558d ("KVM: arm/arm64: vgic-v2: Handle SGI bits in GICD_I{S,C}PENDR0 as WI")
Reviewed-by: James Morse <james.morse@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
btrfs_recover_relocation() invokes btrfs_join_transaction(), which joins
a btrfs_trans_handle object into transactions and returns a reference of
it with increased refcount to "trans".
When btrfs_recover_relocation() returns, "trans" becomes invalid, so the
refcount should be decreased to keep refcount balanced.
The reference counting issue happens in one exception handling path of
btrfs_recover_relocation(). When read_fs_root() failed, the refcnt
increased by btrfs_join_transaction() is not decreased, causing a refcnt
leak.
Fix this issue by calling btrfs_end_transaction() on this error path
when read_fs_root() failed.
Fixes: 79787eaab4 ("btrfs: replace many BUG_ONs with proper error handling")
CC: stable@vger.kernel.org # 4.4+
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Xiyu Yang <xiyuyang19@fudan.edu.cn>
Signed-off-by: Xin Tan <tanxin.ctf@gmail.com>
Signed-off-by: David Sterba <dsterba@suse.com>
btrfs_remove_block_group() invokes btrfs_lookup_block_group(), which
returns a local reference of the block group that contains the given
bytenr to "block_group" with increased refcount.
When btrfs_remove_block_group() returns, "block_group" becomes invalid,
so the refcount should be decreased to keep refcount balanced.
The reference counting issue happens in several exception handling paths
of btrfs_remove_block_group(). When those error scenarios occur such as
btrfs_alloc_path() returns NULL, the function forgets to decrease its
refcnt increased by btrfs_lookup_block_group() and will cause a refcnt
leak.
Fix this issue by jumping to "out_put_group" label and calling
btrfs_put_block_group() when those error scenarios occur.
CC: stable@vger.kernel.org # 4.4+
Signed-off-by: Xiyu Yang <xiyuyang19@fudan.edu.cn>
Signed-off-by: Xin Tan <tanxin.ctf@gmail.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Dave reported a problem where we were panicing with generic/475 with
misc-5.7. This is because we were doing IO after we had stopped all of
the worker threads, because we do the log tree cleanup on roots at drop
time. Cleaning up the log tree will always need to do reads if we
happened to have evicted the blocks from memory.
Because of this simply add a helper to btrfs_cleanup_transaction() that
will go through and drop all of the log roots. This gets run before we
do the close_ctree() work, and thus we are allowed to do any reads that
we would need. I ran this through many iterations of generic/475 with
constrained memory and I did not see the issue.
general protection fault, probably for non-canonical address 0x6b6b6b6b6b6b6b6b: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC PTI
CPU: 2 PID: 12359 Comm: umount Tainted: G W 5.6.0-rc7-btrfs-next-58 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014
RIP: 0010:btrfs_queue_work+0x33/0x1c0 [btrfs]
RSP: 0018:ffff9cfb015937d8 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff8eb5e339ed80 RCX: 0000000000000000
RDX: 0000000000000001 RSI: ffff8eb5eb33b770 RDI: ffff8eb5e37a0460
RBP: ffff8eb5eb33b770 R08: 000000000000020c R09: ffffffff9fc09ac0
R10: 0000000000000007 R11: 0000000000000000 R12: 6b6b6b6b6b6b6b6b
R13: ffff9cfb00229040 R14: 0000000000000008 R15: ffff8eb5d3868000
FS: 00007f167ea022c0(0000) GS:ffff8eb5fae00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f167e5e0cb1 CR3: 0000000138c18004 CR4: 00000000003606e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
btrfs_end_bio+0x81/0x130 [btrfs]
__split_and_process_bio+0xaf/0x4e0 [dm_mod]
? percpu_counter_add_batch+0xa3/0x120
dm_process_bio+0x98/0x290 [dm_mod]
? generic_make_request+0xfb/0x410
dm_make_request+0x4d/0x120 [dm_mod]
? generic_make_request+0xfb/0x410
generic_make_request+0x12a/0x410
? submit_bio+0x38/0x160
submit_bio+0x38/0x160
? percpu_counter_add_batch+0xa3/0x120
btrfs_map_bio+0x289/0x570 [btrfs]
? kmem_cache_alloc+0x24d/0x300
btree_submit_bio_hook+0x79/0xc0 [btrfs]
submit_one_bio+0x31/0x50 [btrfs]
read_extent_buffer_pages+0x2fe/0x450 [btrfs]
btree_read_extent_buffer_pages+0x7e/0x170 [btrfs]
walk_down_log_tree+0x343/0x690 [btrfs]
? walk_log_tree+0x3d/0x380 [btrfs]
walk_log_tree+0xf7/0x380 [btrfs]
? plist_requeue+0xf0/0xf0
? delete_node+0x4b/0x230
free_log_tree+0x4c/0x130 [btrfs]
? wait_log_commit+0x140/0x140 [btrfs]
btrfs_free_log+0x17/0x30 [btrfs]
btrfs_drop_and_free_fs_root+0xb0/0xd0 [btrfs]
btrfs_free_fs_roots+0x10c/0x190 [btrfs]
? do_raw_spin_unlock+0x49/0xc0
? _raw_spin_unlock+0x29/0x40
? release_extent_buffer+0x121/0x170 [btrfs]
close_ctree+0x289/0x2e6 [btrfs]
generic_shutdown_super+0x6c/0x110
kill_anon_super+0xe/0x30
btrfs_kill_super+0x12/0x20 [btrfs]
deactivate_locked_super+0x3a/0x70
Reported-by: David Sterba <dsterba@suse.com>
Fixes: 8c38938c7b ("btrfs: move the root freeing stuff into btrfs_put_root")
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>
When cleaning pinned extents right before deleting an unused block group,
we check if there's still a previous transaction running and if so we
increment its reference count before using it for cleaning pinned ranges
in its pinned extents iotree. However we ended up never decrementing the
reference count after using the transaction, resulting in a memory leak.
Fix it by decrementing the reference count.
Fixes: fe119a6eeb ("btrfs: switch to per-transaction pinned extents")
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
intel_gt_wait_for_idle() tries to wait until all the outstanding requests
are retired and the GPU is idle. As a side effect of retiring requests,
we may submit more work to flush any pm barriers, and so the
wait-for-idle tries to flush the background pm work and catch the new
requests. However, if the work completed in the background before we
were able to flush, it would queue the extra barrier request without us
noticing -- and so we would return from wait-for-idle with one request
remaining. (This breaks e.g. record_default_state where we need to wait
until that barrier is retired, and it may slow suspend down by causing
us to wait on the background retirement worker as opposed to immediately
retiring the barrier.)
However, since we track if there has been a submission since the engine
pm barrier, we can very quickly detect if the idle barrier is still
outstanding.
Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/1763
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Matthew Auld <matthew.auld@intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200423085940.28168-1-chris@chris-wilson.co.uk
During the virtual engine's submission tasklet, we take the request and
insert into the submission queue on each of our siblings. This seems
quite simply, and so no problems with ordering. However, the sibling
execlists' submission tasklets may run concurrently with the virtual
engine's tasklet, submitting the request to HW before the virtual
finishes its task of telling all the siblings. If this happens, the
sibling tasklet may *reorder* the ve->sibling[] array that the virtual
engine tasklet is processing. This can *only* reorder within the
elements already processed by the virtual engine, nevertheless the
race is detected by KCSAN:
[ 185.580014] BUG: KCSAN: data-race in execlists_dequeue [i915] / virtual_submission_tasklet [i915]
[ 185.580054]
[ 185.580076] write to 0xffff8881f1919860 of 8 bytes by interrupt on cpu 2:
[ 185.580553] execlists_dequeue+0x6ad/0x1600 [i915]
[ 185.581044] __execlists_submission_tasklet+0x48/0x60 [i915]
[ 185.581517] execlists_submission_tasklet+0xd3/0x170 [i915]
[ 185.581554] tasklet_action_common.isra.0+0x42/0x90
[ 185.581585] __do_softirq+0xc8/0x206
[ 185.581613] run_ksoftirqd+0x15/0x20
[ 185.581641] smpboot_thread_fn+0x15a/0x270
[ 185.581669] kthread+0x19a/0x1e0
[ 185.581695] ret_from_fork+0x1f/0x30
[ 185.581717]
[ 185.581736] read to 0xffff8881f1919860 of 8 bytes by interrupt on cpu 0:
[ 185.582231] virtual_submission_tasklet+0x10e/0x5c0 [i915]
[ 185.582265] tasklet_action_common.isra.0+0x42/0x90
[ 185.582291] __do_softirq+0xc8/0x206
[ 185.582315] run_ksoftirqd+0x15/0x20
[ 185.582340] smpboot_thread_fn+0x15a/0x270
[ 185.582368] kthread+0x19a/0x1e0
[ 185.582395] ret_from_fork+0x1f/0x30
[ 185.582417]
We can prevent this race by checking for the ve->request after looking
up the sibling array.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200423115315.26825-1-chris@chris-wilson.co.uk
This pull request contains Broadcom ARM-based SoCs Device Tree fixes for
5.7, please pull the following:
- Nicolas provides a fix for 55c7c06210 ("ARM: dts: bcm283x: Fix vc4's
firmware bus DMA limitations") which missed adding proper
#address-cells and #size-cells properties and he also disables the DSI
node which should have been disabled by default but was not.
* tag 'arm-soc/for-5.7/devicetree-fixes' of https://github.com/Broadcom/stblinux:
ARM: dts: bcm283x: Disable dsi0 node
ARM: dts: bcm283x: Add cells encoding format to firmware bus
Link: https://lore.kernel.org/r/20200417171725.1084-1-f.fainelli@gmail.com
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Some of the logging can be poorly formatted because of unexpected
line breaks given printks without KERN_CONT that should be pr_cont.
Miscellanea:
o Remove unnecessary spaces between function name and open parenthesis
o Convert bare printks to pr_<level> where appropriate
o Convert embedded function names to use %s, __func__
o Coalesce formats
o Realign arguments
o Use do {} while (0) in a macro and not a bare if
Signed-off-by: Joe Perches <joe@perches.com>
Reviewed-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
Link: https://lore.kernel.org/r/20200403134325.11523-3-sudipm.mukherjee@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
After registering character device the file operation callbacks can be
called. The open callback registers interrupt handler.
Therefore interrupt handler can execute in parallel with rest of the init
function. To avoid such data race initialize telclk_interrupt variable
and struct alarm_events before registering character device.
Found by Linux Driver Verification project (linuxtesting.org).
Signed-off-by: Madhuparna Bhowmik <madhuparnabhowmik10@gmail.com>
Link: https://lore.kernel.org/r/20200417153451.1551-1-madhuparnabhowmik10@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Fix the following sparse warning:
drivers/misc/sgi-xp/xpc_main.c:62:22: warning: symbol 'xpc_dbg_name' was
not declared. Should it be static?
drivers/misc/sgi-xp/xpc_main.c:66:15: warning: symbol
'xpc_part_dbg_subname' was not declared. Should it be static?
drivers/misc/sgi-xp/xpc_main.c:71:15: warning: symbol
'xpc_chan_dbg_subname' was not declared. Should it be static?
drivers/misc/sgi-xp/xpc_main.c:1221:1: warning: symbol 'xpc_init' was
not declared. Should it be static?
drivers/misc/sgi-xp/xpc_main.c:1323:1: warning: symbol 'xpc_exit' was
not declared. Should it be static?
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Jason Yan <yanaijie@huawei.com>
Link: https://lore.kernel.org/r/20200410063618.27143-2-yanaijie@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Fix the following sparse warning:
drivers/misc/sgi-xp/xpnet.c:99:19: warning: symbol 'xpnet_device' was
not declared. Should it be static?
drivers/misc/sgi-xp/xpnet.c:134:22: warning: symbol 'xpnet_dbg_name' was
not declared. Should it be static?
drivers/misc/sgi-xp/xpnet.c:138:15: warning: symbol 'xpnet_dbg_subname'
was not declared. Should it be static?
drivers/misc/sgi-xp/xpnet.c:143:15: warning: symbol 'xpnet' was not
declared. Should it be static?
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Jason Yan <yanaijie@huawei.com>
Link: https://lore.kernel.org/r/20200410063618.27143-1-yanaijie@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Using SDMA1 with UART1 is causing a "Timeout waiting for CH0" error.
This patch changes to ahb clock from SDMA1_ROOT to AHB which fixes the
timeout error.
Fixes: 6c3debcbae ("arm64: dts: freescale: Add i.MX8MN dtsi support")
Signed-off-by: Adam Ford <aford173@gmail.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
The I2C2 pins are already used and the following errors are seen:
imx27-pinctrl 10015000.iomuxc: pin MX27_PAD_I2C2_SDA already requested by 10012000.i2c; cannot claim for 1001d000.i2c
imx27-pinctrl 10015000.iomuxc: pin-69 (1001d000.i2c) status -22
imx27-pinctrl 10015000.iomuxc: could not request pin 69 (MX27_PAD_I2C2_SDA) from group i2c2grp on device 10015000.iomuxc
imx-i2c 1001d000.i2c: Error applying setting, reverse things back
imx-i2c: probe of 1001d000.i2c failed with error -22
Fix it by adding the correct I2C1 IOMUX entries for the pinctrl_i2c1 group.
Cc: <stable@vger.kernel.org>
Fixes: 61664d0b43 ("ARM: dts: imx27 phyCARD-S pinctrl")
Signed-off-by: Fabio Estevam <festevam@gmail.com>
Reviewed-by: Stefan Riedmueller <s.riedmueller@phytec.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
The header of the message to send can be changed if the
response is longer than the request:
- 1st word, the header is sent
- the remaining words of the message are sent
- the response is received asynchronously during the
execution of the loop, changing the size field in
the header
- the for loop test the termination condition using
the corrupted header
It is the case for the API build_info which has just a
header as request but 3 words in response.
This issue is fixed storing the header locally instead of
using a pointer on it.
Fixes: edbee095fa (firmware: imx: add SCU firmware driver support)
Signed-off-by: Franck LENORMAND <franck.lenormand@nxp.com>
Reviewed-by: Leonard Crestez <leonard.crestez@nxp.com>
Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com>
Cc: stable@vger.kernel.org
Reviewed-by: Dong Aisheng <aisheng.dong@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
Beacon Embeddedworks is launching a development kit based on the
i.MX8M Mini SoC. The kit consists of a System on Module (SOM)
+ baseboard. The SOM has the SoC, eMMC, and Ethernet. The baseboard
has an wm8962 audio CODEC, a single USB OTG, and three USB host ports.
Signed-off-by: Adam Ford <aford173@gmail.com>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
Moritz writes:
FPGA Manager fixes for 5.7-rc1
Here are two (late) fixes for 5.7-rc1 merge window.
Xu's change addresses an issue with a wrong return value.
Shubhrajyoti's change makes the Zynq FPGA driver return -EPROBE_DEFER on
All patches have been reviewed on the mailing list, and have been in the
last few linux-next releases (as part of my for-next branch) without issues.
Signed-off-by: Moritz Fischer <mdf@kernel.org>
* tag 'fpga-fixes-for-5.7' of git://git.kernel.org/pub/scm/linux/kernel/git/mdf/linux-fpga:
fpga: dfl: pci: fix return value of cci_pci_sriov_configure
fpga: zynq: Remove clk_get error message for probe defer
To control degree of parallelism of the synthesize_mmap() code which
is scanning /proc/PID/task/PID/maps and can be time consuming.
Mimic perf top way of handling the option.
If not specified will default to 1 thread, i.e. default behavior before
this option.
On a desktop computer the processing of /proc/PID/task/PID/maps isn't
slow enough to warrant parallel processing and the thread creation has
some cost - hence the default of 1. On a loaded server with
>100 cores it is possible to see synthesis times in the order of
seconds and in this case having the option is desirable.
As the processing is a synchronization point, it is legitimate to worry if
Amdahl's law will apply to this patch. Profiling with this patch in
place:
https://lore.kernel.org/lkml/20200415054050.31645-4-irogers@google.com/
shows:
...
- 32.59% __perf_event__synthesize_threads
- 32.54% __event__synthesize_thread
+ 22.13% perf_event__synthesize_mmap_events
+ 6.68% perf_event__get_comm_ids.constprop.0
+ 1.49% process_synthesized_event
+ 1.29% __GI___readdir64
+ 0.60% __opendir
...
That is the processing is 1.49% of execution time and there is plenty to
make parallel. This is shown in the benchmark in this patch:
https://lore.kernel.org/lkml/20200415054050.31645-2-irogers@google.com/
Computing performance of multi threaded perf event synthesis by
synthesizing events on CPU 0:
Number of synthesis threads: 1
Average synthesis took: 127729.000 usec (+- 3372.880 usec)
Average num. events: 21548.600 (+- 0.306)
Average time per event 5.927 usec
Number of synthesis threads: 2
Average synthesis took: 88863.500 usec (+- 385.168 usec)
Average num. events: 21552.800 (+- 0.327)
Average time per event 4.123 usec
Number of synthesis threads: 3
Average synthesis took: 83257.400 usec (+- 348.617 usec)
Average num. events: 21553.200 (+- 0.327)
Average time per event 3.863 usec
Number of synthesis threads: 4
Average synthesis took: 75093.000 usec (+- 422.978 usec)
Average num. events: 21554.200 (+- 0.200)
Average time per event 3.484 usec
Number of synthesis threads: 5
Average synthesis took: 64896.600 usec (+- 353.348 usec)
Average num. events: 21558.000 (+- 0.000)
Average time per event 3.010 usec
Number of synthesis threads: 6
Average synthesis took: 59210.200 usec (+- 342.890 usec)
Average num. events: 21560.000 (+- 0.000)
Average time per event 2.746 usec
Number of synthesis threads: 7
Average synthesis took: 54093.900 usec (+- 306.247 usec)
Average num. events: 21562.000 (+- 0.000)
Average time per event 2.509 usec
Number of synthesis threads: 8
Average synthesis took: 48938.700 usec (+- 341.732 usec)
Average num. events: 21564.000 (+- 0.000)
Average time per event 2.269 usec
Where average time per synthesized event goes from 5.927 usec with 1
thread to 2.269 usec with 8. This isn't a linear speed up as not all of
synthesize code has been made parallel. If the synthesis time was about
10 seconds then using 8 threads may bring this down to less than 4.
Signed-off-by: Stephane Eranian <eranian@google.com>
Reviewed-by: Ian Rogers <irogers@google.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexey Budankov <alexey.budankov@linux.intel.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Tony Jones <tonyj@suse.de>
Cc: yuzhoujian <yuzhoujian@didichuxing.com>
Link: http://lore.kernel.org/lkml/20200422155038.9380-1-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Commit 2d4f27999b ("perf data: Add global path holder") missed path
conversion in tests/topology.c, causing the "Session topology" testcase
to "hang" (waits forever for input from stdin) when doing "ssh $VM perf
test".
Can be reproduced by running "cat | perf test topo", and crashed by
replacing cat with true:
$ true | perf test -v topo
40: Session topology :
--- start ---
test child forked, pid 3638
templ file: /tmp/perf-test-QPvAch
incompatible file format
incompatible file format (rerun with -v to learn more)
free(): invalid pointer
test child interrupted
---- end ----
Session topology: FAILED!
Committer testing:
Reproduced the above result before the patch and after it is back
working:
# true | perf test -v topo
41: Session topology :
--- start ---
test child forked, pid 19374
templ file: /tmp/perf-test-YOTEQg
CPU 0, core 0, socket 0
CPU 1, core 1, socket 0
CPU 2, core 2, socket 0
CPU 3, core 3, socket 0
CPU 4, core 0, socket 0
CPU 5, core 1, socket 0
CPU 6, core 2, socket 0
CPU 7, core 3, socket 0
test child finished with 0
---- end ----
Session topology: Ok
#
Fixes: 2d4f27999b ("perf data: Add global path holder")
Signed-off-by: Tommi Rantala <tommi.t.rantala@nokia.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Mamatha Inamdar <mamatha4@linux.vnet.ibm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
Link: http://lore.kernel.org/lkml/20200423115341.562782-1-tommi.t.rantala@nokia.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
There are few parameters that are not described properly.
Fill the gap by describing them properly in kernel doc format.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
