From: Martin Wilck <mwilck@xxxxxxxx> commit 5a263892d7d0b4fe351363f8d1a14c6a75955475 upstream. qlt_free_session_done() tries to post async PRLO / LOGO, and waits for the completion of these async commands. If UNLOADING is set, this is doomed to timeout, because the async logout command will never complete. The only way to avoid waiting pointlessly is to fail posting these commands in the first place if the driver is in UNLOADING state. In general, posting any command should be avoided when the driver is UNLOADING. With this patch, "rmmod qla2xxx" completes without noticeable delay. Link: https://lore.kernel.org/r/20200421204621.19228-3-mwilck@xxxxxxxx Fixes: 45235022da99 ("scsi: qla2xxx: Fix driver unload by shutting down chip") Acked-by: Arun Easi <aeasi@xxxxxxxxxxx> Reviewed-by: Himanshu Madhani <himanshu.madhani@xxxxxxxxxx> Signed-off-by: Martin Wilck <mwilck@xxxxxxxx> Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/scsi/qla2xxx/qla_os.c | 3 +++ 1 file changed, 3 insertions(+) --- a/drivers/scsi/qla2xxx/qla_os.c +++ b/drivers/scsi/qla2xxx/qla_os.c @@ -4854,6 +4854,9 @@ qla2x00_alloc_work(struct scsi_qla_host struct qla_work_evt *e; uint8_t bail; + if (test_bit(UNLOADING, &vha->dpc_flags)) + return NULL; + QLA_VHA_MARK_BUSY(vha, bail); if (bail) return NULL;
