Hannes Reinecke 5faf50e9e9 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>		2020-11-02 18:09:49 -05:00
..
Kconfig
Makefile
scsi_dh_alua.c
scsi_dh_emc.c
scsi_dh_hp_sw.c
scsi_dh_rdac.c