diff options
| author | Hannes Reinecke <hare@suse.de> | 2020-09-24 12:45:59 +0200 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2020-11-02 18:09:49 -0500 |
| commit | 5faf50e9e9fdc2117c61ff7e20da49cd6a29e0ca (patch) | |
| tree | abbe157a8252e3270e0569fe61c3bab1a7735998 /drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c | |
| parent | af61bc1e33d2c0ec22612b46050f5b58ac56a962 (diff) | |
scsi: scsi_dh_alua: Avoid crash during alua_bus_detach()
alua_bus_detach() might be running concurrently with alua_rtpg_work(), so
we might trip over h->sdev == NULL and call BUG_ON(). The correct way of
handling it is to not set h->sdev to NULL in alua_bus_detach(), and call
rcu_synchronize() before the final delete to ensure that all concurrent
threads have left the critical section. Then we can get rid of the
BUG_ON() and replace it with a simple if condition.
Link: https://lore.kernel.org/r/1600167537-12509-1-git-send-email-jitendra.khasdev@oracle.com
Link: https://lore.kernel.org/r/20200924104559.26753-1-hare@suse.de
Cc: Brian Bunker <brian@purestorage.com>
Acked-by: Brian Bunker <brian@purestorage.com>
Tested-by: Jitendra Khasdev <jitendra.khasdev@oracle.com>
Reviewed-by: Jitendra Khasdev <jitendra.khasdev@oracle.com>
Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c')
0 files changed, 0 insertions, 0 deletions