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| author | Subash Abhinov Kasiviswanathan <subashab@codeaurora.org> | 2019-11-29 16:35:09 -0700 |
|---|---|---|
| committer | Subash Abhinov Kasiviswanathan <subashab@codeaurora.org> | 2019-11-29 16:52:08 -0700 |
| commit | be89ad02e5d82ec54a304c1e947ce66055fc59de (patch) | |
| tree | f18553b1de378b261ab87ade889fedf518c36dc1 /drivers/rmnet/shs/rmnet_shs_wq.c | |
| parent | 74ba58976f508d25ca187bf9fdaa1ec981745e72 (diff) | |
| download | data-kernel-be89ad02e5d82ec54a304c1e947ce66055fc59de.tar.gz | |
drivers: shs: Protect all file system operations using shs ep lock
This add synchronization between the file system operations and the
updates which occur within the shs workqueue. Fixes the following
when there are two instances of userspace handlers running and are
killed together-
<6> Unable to handle kernel paging request at virtual address ffffffbfadadadb4
<2> pc : __free_pages+0x24/0xc0
<2> lr : free_pages+0x38/0x48
<2> Call trace:
<2> __free_pages+0x24/0xc0
<2> free_pages+0x38/0x48
<2> rmnet_shs_release_caps+0x9c/0xb0 [rmnet_shs]
<2> close_pdeo+0x94/0x120
<2> proc_reg_release+0x64/0x88
<2> __fput+0xdc/0x1d8
<2> ____fput+0x1c/0x28
<2> task_work_run+0x48/0xd0
<2> do_notify_resume+0x950/0x1160
<2> work_pending+0x8/0x14
CRs-fixed: 2576578
Change-Id: I67d1fc4d1f3c93d4497e988c2118c410091f0dd2
Signed-off-by: Subash Abhinov Kasiviswanathan <subashab@codeaurora.org>
Diffstat (limited to 'drivers/rmnet/shs/rmnet_shs_wq.c')
| -rw-r--r-- | drivers/rmnet/shs/rmnet_shs_wq.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/rmnet/shs/rmnet_shs_wq.c b/drivers/rmnet/shs/rmnet_shs_wq.c index 60653bf..4c69b57 100644 --- a/drivers/rmnet/shs/rmnet_shs_wq.c +++ b/drivers/rmnet/shs/rmnet_shs_wq.c @@ -2194,3 +2194,13 @@ u64 rmnet_shs_wq_get_max_allowed_pps(u16 cpu) return rmnet_shs_cpu_rx_max_pps_thresh[cpu]; } + +void rmnet_shs_wq_ep_lock_bh(void) +{ + spin_lock_bh(&rmnet_shs_ep_lock); +} + +void rmnet_shs_wq_ep_unlock_bh(void) +{ + spin_unlock_bh(&rmnet_shs_ep_lock); +} |