nvidia-tegra-modules.git/drivers/crypto, branch gpu-paging NVIDIA's kernel modules to support tegra chips (used in Jetson boards) crypto: tegra: return error upon wait timeout 2021-09-24T13:24:54+00:00 Harinarayan Bhatta hbhatta@nvidia.com 2021-09-17T02:04:02+00:00 8eaae7f5c8647821846c217b5c8a8c6c0a10d1ee Return an error value from process_crypt_req if wait_for_completion_timeout returns 0 in case of a timeout waiting for crypto operation to complete. Bug 200771660 Change-Id: Ie7597a053274cace6b930895e3f969622a813d76 Signed-off-by: Harinarayan Bhatta <hbhatta@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/#/c/linux-nvidia/+/2596050 (cherry picked from commit f62687d53e0437b6138c02a4463acee21361cd26) Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvidia/+/2599867 Reviewed-by: svcacv <svcacv@nvidia.com> Reviewed-by: Phoenix Jung <pjung@nvidia.com> Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com> GVS: Gerrit_Virtual_Submit Tested-by: mobile promotions <svcmobile_promotions@nvidia.com> 
Return an error value from process_crypt_req if
wait_for_completion_timeout returns 0 in case of a timeout waiting
for crypto operation to complete.

Bug 200771660

Change-Id: Ie7597a053274cace6b930895e3f969622a813d76
Signed-off-by: Harinarayan Bhatta <hbhatta@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/#/c/linux-nvidia/+/2596050
(cherry picked from commit f62687d53e0437b6138c02a4463acee21361cd26)
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvidia/+/2599867
Reviewed-by: svcacv <svcacv@nvidia.com>
Reviewed-by: Phoenix Jung <pjung@nvidia.com>
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crypto: vse: fix rng generate return value 2021-08-19T20:55:31+00:00 Harinarayan Bhatta hbhatta@nvidia.com 2021-08-11T11:21:48+00:00 73218645cb2c7a037e9e3f9ae4c0feccd67389b6 Fix the return value of rng generate() function according to the Linux crypto framework's header file include/crypto/rng.h. Also, return -EAGAIN error code if SE server returns timeout (-13) when trying to acquire RNG1 mutex. Bug 200753491 Change-Id: I29d13f457b15ee8c8d02d01b5c1216b694d70680 Signed-off-by: Harinarayan Bhatta <hbhatta@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvidia/+/2574509 Tested-by: mobile promotions <svcmobile_promotions@nvidia.com> Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com> 
Fix the return value of rng generate() function according to the Linux
crypto framework's header file include/crypto/rng.h.

Also, return -EAGAIN error code if SE server returns timeout (-13) when
trying to acquire RNG1 mutex.

Bug 200753491

Change-Id: I29d13f457b15ee8c8d02d01b5c1216b694d70680
Signed-off-by: Harinarayan Bhatta <hbhatta@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvidia/+/2574509
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
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tegra-hv-vse: Check ptr against NULL,before access. 2021-08-13T20:11:08+00:00 Achal Verma achalv@nvidia.com 2021-05-11T09:44:57+00:00 35fe1101fc0bf0e423936d1adb40d9bb28eeee74 This fix coverity issue: 9625627 Bug 200741055 Change-Id: I33c686ae973a44fbd7ed86e4b5a36f18683568fd Signed-off-by: Achal Verma <achalv@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvidia/+/2527699 GVS: Gerrit_Virtual_Submit Reviewed-by: Dmitry Pervushin <dpervushin@nvidia.com> Reviewed-by: Rahul Jain (SW-TEGRA) <rahuljain@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvidia/+/2575325 Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com> Reviewed-by: Phoenix Jung <pjung@nvidia.com> Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com> Tested-by: mobile promotions <svcmobile_promotions@nvidia.com> 
This fix coverity issue: 9625627

Bug 200741055

Change-Id: I33c686ae973a44fbd7ed86e4b5a36f18683568fd
Signed-off-by: Achal Verma <achalv@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvidia/+/2527699
GVS: Gerrit_Virtual_Submit
Reviewed-by: Dmitry Pervushin <dpervushin@nvidia.com>
Reviewed-by: Rahul Jain (SW-TEGRA) <rahuljain@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvidia/+/2575325
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
Reviewed-by: Phoenix Jung <pjung@nvidia.com>
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vse: unregister aes algorithm 2021-07-16T19:54:13+00:00 Chaitanya Namuduri snamuduri@nvidia.com 2021-06-28T03:45:42+00:00 86ef751aa0926123f695748e4bf7c3436d1ba100 Bug 200716783 Added module support. Unregister all crypto alogrithms at module exit. Clean up VSE kthread and memory allocations. Change-Id: Ib1630037c8ab33c4636055aafaa9dfa64e9112ff Signed-off-by: Chaitanya Namuduri <snamuduri@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvidia/+/2550598 Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com> Reviewed-by: svcacv <svcacv@nvidia.com> Reviewed-by: Harinarayan Bhatta <hbhatta@nvidia.com> Reviewed-by: Dmitry Pervushin <dpervushin@nvidia.com> Reviewed-by: Phoenix Jung <pjung@nvidia.com> Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com> GVS: Gerrit_Virtual_Submit Tested-by: mobile promotions <svcmobile_promotions@nvidia.com> 
Bug 200716783

Added module support.
Unregister all crypto alogrithms at module exit.
Clean up VSE kthread and memory allocations.

Change-Id: Ib1630037c8ab33c4636055aafaa9dfa64e9112ff
Signed-off-by: Chaitanya Namuduri <snamuduri@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvidia/+/2550598
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
Reviewed-by: svcacv <svcacv@nvidia.com>
Reviewed-by: Harinarayan Bhatta <hbhatta@nvidia.com>
Reviewed-by: Dmitry Pervushin <dpervushin@nvidia.com>
Reviewed-by: Phoenix Jung <pjung@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
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drivers: crypto: Update tegra-se to support FIPS 2021-06-14T22:24:05+00:00 Ankit Patel anpatel@nvidia.com 2021-05-19T19:55:12+00:00 d8042f70260c1a872df51c5ed60d39377caad497 In process of resolve the crash and erros update code as per below, o Re arranged tegra_se_elp_probe for mutex init o Re arranged tegra_se_probe for different crypto test o Remove bug in handling memory pointers o Set flags in internal crypto allocation while using it for sign o Change sequence in Makefile to delay probing sequence of elp o Change rsa crypto name to "rsa-pka1" in elp Bug 3274911 Bug 200739154 Signed-off-by: Ankit Patel <anpatel@nvidia.com> Change-Id: Iefc04d975a5d2c71bf41050f32e36e8cfec5c966 Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvidia/+/2532028 Reviewed-by: svcacv <svcacv@nvidia.com> Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com> Reviewed-by: Rakesh Babu Bodla <rbodla@nvidia.com> Reviewed-by: Bibek Basu <bbasu@nvidia.com> Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com> GVS: Gerrit_Virtual_Submit Tested-by: mobile promotions <svcmobile_promotions@nvidia.com> 
In process of resolve the crash and erros update code as per below,

   o Re arranged tegra_se_elp_probe for mutex init
   o Re arranged tegra_se_probe for different crypto test
   o Remove bug in handling memory pointers
   o Set flags in internal crypto allocation while using it for sign
   o Change sequence in Makefile to delay probing sequence of elp
   o Change rsa crypto name to "rsa-pka1" in elp

Bug 3274911
Bug 200739154

Signed-off-by: Ankit Patel <anpatel@nvidia.com>
Change-Id: Iefc04d975a5d2c71bf41050f32e36e8cfec5c966
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvidia/+/2532028
Reviewed-by: svcacv <svcacv@nvidia.com>
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
Reviewed-by: Rakesh Babu Bodla <rbodla@nvidia.com>
Reviewed-by: Bibek Basu <bbasu@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
GVS: Gerrit_Virtual_Submit
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cryptodev: Add mutex lock for synchronization 2021-05-13T01:44:54+00:00 Rakesh Babu Bodla rbodla@nvidia.com 2021-04-30T11:08:56+00:00 90335911c82543d7db68ec92f1cb2f8c9589d87c There is a possibility of race condition between different crypto operations which can lead to accessing dangling pointers and can lead to crash. Add mutex lock for synchronization. Bug 3308522 Bug 3299723 Signed-off-by: Rakesh Babu Bodla <rbodla@nvidia.com> Change-Id: Id12097b816373025d06fc760e7a85362e1d1cd4b Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvidia/+/2527329 Tested-by: mobile promotions <svcmobile_promotions@nvidia.com> Reviewed-by: svcacv <svcacv@nvidia.com> Reviewed-by: Bitan Biswas <bbiswas@nvidia.com> Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com> Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com> GVS: Gerrit_Virtual_Submit 
There is a possibility of race condition between
different crypto operations which can lead to
accessing dangling pointers and can lead to crash.
Add mutex lock for synchronization.

Bug 3308522
Bug 3299723


Signed-off-by: Rakesh Babu Bodla <rbodla@nvidia.com>
Change-Id: Id12097b816373025d06fc760e7a85362e1d1cd4b
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvidia/+/2527329
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
Reviewed-by: svcacv <svcacv@nvidia.com>
Reviewed-by: Bitan Biswas <bbiswas@nvidia.com>
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tegra: se-nvhost: Added key slot link head check 2021-05-03T08:41:31+00:00 Jason Mei jianjunm@nvidia.com 2021-04-25T07:00:12+00:00 ca054691d0629b7aaedcfdddc52960353f54c7f2 There are more the one secure engines, use the 16 public key-slots. Every secure engine may initialize the key-slots according to the supported algorithm, to avoid key-slots wrong initializing, check the key_slot list head. Bug 3279249 Change-Id: Id58a993292e28884acb115bf6cf207d8bd990c60 Signed-off-by: Jason Mei <jianjunm@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvidia/+/2520081 Reviewed-by: svcacv <svcacv@nvidia.com> Reviewed-by: Jackie Chen <jackchen@nvidia.com> Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com> Reviewed-by: Rakesh Babu Bodla <rbodla@nvidia.com> Reviewed-by: Bibek Basu <bbasu@nvidia.com> Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com> GVS: Gerrit_Virtual_Submit Tested-by: mobile promotions <svcmobile_promotions@nvidia.com> 
There are more the one secure engines, use the 16 public key-slots.
Every secure engine may initialize the key-slots according to the
supported algorithm, to avoid key-slots wrong initializing, check
the key_slot list head.

Bug 3279249

Change-Id: Id58a993292e28884acb115bf6cf207d8bd990c60
Signed-off-by: Jason Mei <jianjunm@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvidia/+/2520081
Reviewed-by: svcacv <svcacv@nvidia.com>
Reviewed-by: Jackie Chen <jackchen@nvidia.com>
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
Reviewed-by: Rakesh Babu Bodla <rbodla@nvidia.com>
Reviewed-by: Bibek Basu <bbasu@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
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crypto: tegra-hv-vse: fix a data abort 2021-04-05T09:54:30+00:00 ByungKuk Seo bseo@nvidia.com 2021-03-23T08:30:43+00:00 ee1c50e0d2921c59934364dba605cdcc21267034 In tegra_hv_vse_probe(), the initialization of mempool for AES1 blkcipher ops was done after AES1 was registered to be ready for use by kernel crypto framework. This results in a data abort when mempool_alloc() is attempted in a setup having the ko module loaded as late as cryptsetup or similar app is launched. Bug 3279914 Change-Id: Ic2805043c16c8f6c03ff0d151700273f38f12e28 Signed-off-by: ByungKuk Seo <bseo@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvidia/+/2507605 Tested-by: mobile promotions <svcmobile_promotions@nvidia.com> Reviewed-by: svcacv <svcacv@nvidia.com> Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com> Reviewed-by: Harinarayan Bhatta <hbhatta@nvidia.com> Reviewed-by: Phoenix Jung <pjung@nvidia.com> Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com> GVS: Gerrit_Virtual_Submit 
In tegra_hv_vse_probe(), the initialization of mempool for AES1
blkcipher ops was done after AES1 was registered to be ready for use by
kernel crypto framework.

This results in a data abort when mempool_alloc() is attempted in a
setup having the ko module loaded as late as cryptsetup or similar app
is launched.

Bug 3279914

Change-Id: Ic2805043c16c8f6c03ff0d151700273f38f12e28
Signed-off-by: ByungKuk Seo <bseo@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvidia/+/2507605
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
Reviewed-by: svcacv <svcacv@nvidia.com>
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Reviewed-by: Phoenix Jung <pjung@nvidia.com>
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vse: Fix null pointer dereference. 2021-03-30T20:41:56+00:00 Achal Verma achalv@nvidia.com 2021-01-27T06:13:13+00:00 699508e9dc6f39c963ccc7ee8b4e816bcee455cc Fix null pointer dereferencing in an error print before pointer is assigned to non null value. This fix coverity issue: 2448554 Bug 200689436 Change-Id: If85e16d50d7286b3fa67d2d9a7162b22fe048616 Signed-off-by: Achal Verma <achalv@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvidia/+/2475949 Reviewed-by: Automatic_Commit_Validation_User Reviewed-by: Dmitry Pervushin <dpervushin@nvidia.com> Reviewed-by: Rahul Jain (SW-TEGRA) <rahuljain@nvidia.com> Tested-by: Smriti Sharma <smritis@nvidia.com> GVS: Gerrit_Virtual_Submit (cherry picked from commit 559dc2257bc22855010b690f31272e321deeda73) Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvidia/+/2499890 Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com> Reviewed-by: Phoenix Jung <pjung@nvidia.com> Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com> Tested-by: mobile promotions <svcmobile_promotions@nvidia.com> 
Fix null pointer dereferencing in an error print
before pointer is assigned to non null value.

This fix coverity issue: 2448554

Bug 200689436

Change-Id: If85e16d50d7286b3fa67d2d9a7162b22fe048616
Signed-off-by: Achal Verma <achalv@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvidia/+/2475949
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Dmitry Pervushin <dpervushin@nvidia.com>
Reviewed-by: Rahul Jain (SW-TEGRA) <rahuljain@nvidia.com>
Tested-by: Smriti Sharma <smritis@nvidia.com>
GVS: Gerrit_Virtual_Submit
(cherry picked from commit 559dc2257bc22855010b690f31272e321deeda73)
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvidia/+/2499890
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Reviewed-by: Phoenix Jung <pjung@nvidia.com>
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crypto: vse: fix on a cyclic deadlock 2020-11-23T16:40:24+00:00 ByungKuk Seo bseo@nvidia.com 2020-11-12T01:45:04+00:00 b0974b2314e693dd2c326b4c26b2451aebc35870 kmalloc(GFP_KERNEL) attempts to perform filesystem operations by flushing caches to secure more memory. However, if this request originates from filesystem like dm-crypt, then this can become recursive by trying to free up the page caches where vse crypto operations are in progress. For the AES1 path called by dm-crypt, two changes are made as below: 1) Replace devm_kzalloc with mempool_alloc that can fall back to pre- allocated elements when kmalloc fails to allocate one. 2) Replace GFP_KERNEL with GFP_NOFS which does not allow making subsequent filesystem calls [ 984.136687] Workqueue: vse_work_q tegra_hv_vse_work_handler [ 984.136694] Call trace: [ 984.138297] [<ffffff8008086214>] __switch_to+0x9c/0xc0 [ 984.140697] [<ffffff8008d47230>] __schedule+0x1e8/0x528 [ 984.143173] [<ffffff8008d475b0>] schedule+0x40/0xa8 [ 984.145558] [<ffffff8008332c08>] jbd2_log_wait_commit+0xb8/0x140 [ 984.148215] [<ffffff80083345a8>] jbd2_complete_transaction+0x90/0xc0 [ 984.151056] [<ffffff80082e0d7c>] ext4_evict_inode+0x2dc/0x530 [ 984.153731] [<ffffff80082567f0>] evict+0xa8/0x168 [ 984.156059] [<ffffff80082568f8>] dispose_list+0x48/0x60 [ 984.158538] [<ffffff8008257fe4>] prune_icache_sb+0x6c/0x98 [ 984.161057] [<ffffff800823b2bc>] super_cache_scan+0xf4/0x168 [ 984.163597] [<ffffff80081cd554>] do_shrink_slab+0x14c/0x3d0 [ 984.166091] [<ffffff80081cdb68>] shrink_slab.part.0+0xc0/0x130 [ 984.168658] [<ffffff80081cdc50>] shrink_slab+0x78/0x90 [ 984.171111] [<ffffff80081d21bc>] shrink_node+0xd4/0x338 [ 984.173593] [<ffffff80081d2500>] do_try_to_free_pages+0xe0/0x360 [ 984.176263] [<ffffff80081d2878>] try_to_free_pages+0xf8/0x298 [ 984.178879] [<ffffff80081c0ae8>] __alloc_pages_nodemask+0x580/0xc18 [ 984.181618] [<ffffff80081e38f4>] kmalloc_order+0x3c/0x80 [ 984.184027] [<ffffff80081e3974>] kmalloc_order_trace+0x3c/0x110 [ 984.186644] [<ffffff800821a710>] __kmalloc_track_caller+0x2c8/0x340 [ 984.189454] [<ffffff8008792730>] devm_kmalloc+0x38/0x78 [ 984.191927] [<ffffff8008a90640>] tegra_hv_vse_work_handler +0x190/0x498 [ 984.194820] [<ffffff80080c3880>] process_one_work+0x1b8/0x460 [ 984.197385] [<ffffff80080c3b7c>] worker_thread+0x54/0x488 [ 984.199917] [<ffffff80080ca900>] kthread+0x100/0x108 [ 984.202343] [<ffffff8008083470>] ret_from_fork+0x10/0x20 Bug 3170706 Change-Id: I31bed6f690ff8ba3fbe0bf7264ef6397e8963b65 Signed-off-by: ByungKuk Seo <bseo@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvidia/+/2447570 Tested-by: mobile promotions <svcmobile_promotions@nvidia.com> Reviewed-by: automaticguardword <automaticguardword@nvidia.com> Reviewed-by: Alvin Park <apark@nvidia.com> Reviewed-by: Harinarayan Bhatta <hbhatta@nvidia.com> Reviewed-by: Phoenix Jung <pjung@nvidia.com> Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com> GVS: Gerrit_Virtual_Submit 
kmalloc(GFP_KERNEL) attempts to perform filesystem operations by
flushing caches to secure more memory. However, if this request
originates from filesystem like dm-crypt, then this can become
recursive by trying to free up the page caches where vse crypto
operations are in progress.

For the AES1 path called by dm-crypt, two changes are made as below:
1) Replace devm_kzalloc with mempool_alloc that can fall back to pre-
   allocated elements when kmalloc fails to allocate one.
2) Replace GFP_KERNEL with GFP_NOFS which does not allow making
   subsequent filesystem calls

[  984.136687] Workqueue: vse_work_q tegra_hv_vse_work_handler
[  984.136694] Call trace:
[  984.138297] [<ffffff8008086214>] __switch_to+0x9c/0xc0
[  984.140697] [<ffffff8008d47230>] __schedule+0x1e8/0x528
[  984.143173] [<ffffff8008d475b0>] schedule+0x40/0xa8
[  984.145558] [<ffffff8008332c08>] jbd2_log_wait_commit+0xb8/0x140
[  984.148215] [<ffffff80083345a8>] jbd2_complete_transaction+0x90/0xc0
[  984.151056] [<ffffff80082e0d7c>] ext4_evict_inode+0x2dc/0x530
[  984.153731] [<ffffff80082567f0>] evict+0xa8/0x168
[  984.156059] [<ffffff80082568f8>] dispose_list+0x48/0x60
[  984.158538] [<ffffff8008257fe4>] prune_icache_sb+0x6c/0x98
[  984.161057] [<ffffff800823b2bc>] super_cache_scan+0xf4/0x168
[  984.163597] [<ffffff80081cd554>] do_shrink_slab+0x14c/0x3d0
[  984.166091] [<ffffff80081cdb68>] shrink_slab.part.0+0xc0/0x130
[  984.168658] [<ffffff80081cdc50>] shrink_slab+0x78/0x90
[  984.171111] [<ffffff80081d21bc>] shrink_node+0xd4/0x338
[  984.173593] [<ffffff80081d2500>] do_try_to_free_pages+0xe0/0x360
[  984.176263] [<ffffff80081d2878>] try_to_free_pages+0xf8/0x298
[  984.178879] [<ffffff80081c0ae8>] __alloc_pages_nodemask+0x580/0xc18
[  984.181618] [<ffffff80081e38f4>] kmalloc_order+0x3c/0x80
[  984.184027] [<ffffff80081e3974>] kmalloc_order_trace+0x3c/0x110
[  984.186644] [<ffffff800821a710>] __kmalloc_track_caller+0x2c8/0x340
[  984.189454] [<ffffff8008792730>] devm_kmalloc+0x38/0x78
[  984.191927] [<ffffff8008a90640>] tegra_hv_vse_work_handler
					+0x190/0x498
[  984.194820] [<ffffff80080c3880>] process_one_work+0x1b8/0x460
[  984.197385] [<ffffff80080c3b7c>] worker_thread+0x54/0x488
[  984.199917] [<ffffff80080ca900>] kthread+0x100/0x108
[  984.202343] [<ffffff8008083470>] ret_from_fork+0x10/0x20

Bug 3170706

Change-Id: I31bed6f690ff8ba3fbe0bf7264ef6397e8963b65
Signed-off-by: ByungKuk Seo <bseo@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvidia/+/2447570
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
Reviewed-by: automaticguardword <automaticguardword@nvidia.com>
Reviewed-by: Alvin Park <apark@nvidia.com>
Reviewed-by: Harinarayan Bhatta <hbhatta@nvidia.com>
Reviewed-by: Phoenix Jung <pjung@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
GVS: Gerrit_Virtual_Submit