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| author | Ranjan Kumar <ranjan.kumar@broadcom.com> | 2023-04-06 13:18:19 +0300 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2023-04-12 04:17:56 +0300 |
| commit | 2acc635a0e5e91c267f2cb1c25748e8d06888e63 (patch) | |
| tree | 00573653251219386914116b65852c16a08ee3b6 /tools/perf/scripts/python/syscall-counts.py | |
| parent | b32283d75335d8263fc9f5ae16c8a196f1d8b5d5 (diff) | |
| download | linux-2acc635a0e5e91c267f2cb1c25748e8d06888e63.tar.xz | |
scsi: mpi3mr: Use IRQ save variants of spinlock to protect chain frame allocation
Driver uses spin lock without irqsave when it needs to acquire a chain
frame. This is done to protect chain frame allocation from multiple
submission threads. If there is any I/O queued from an interrupt context,
and if that requires a chain frame, and if the chain lock is held by the CPU
which got interrupted, then there will be a possible deadlock.
Signed-off-by: Ranjan Kumar <ranjan.kumar@broadcom.com>
Link: https://lore.kernel.org/r/20230406101819.10109-1-ranjan.kumar@broadcom.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'tools/perf/scripts/python/syscall-counts.py')
0 files changed, 0 insertions, 0 deletions