From: Long Li <[email protected]> FC disks issue I/O directly to the host storage port driver, this is diffirent to VHD disks where I/O is virtualized and timeout is handled by the host VSP (Virtualization Service Provider).
FC disks are usually setup in a multipath system, and they don't want to reset timer on I/O timeout. Timeout is detected by multipath as a good time to failover and recover. Patch v2 includes suggestions from Bart Van Assche <[email protected]> Signed-off-by: Long Li <[email protected]> --- drivers/scsi/storvsc_drv.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/scsi/storvsc_drv.c b/drivers/scsi/storvsc_drv.c index 8d955db..3cc8d67 100644 --- a/drivers/scsi/storvsc_drv.c +++ b/drivers/scsi/storvsc_drv.c @@ -1495,6 +1495,10 @@ static int storvsc_host_reset_handler(struct scsi_cmnd *scmnd) */ static enum blk_eh_timer_return storvsc_eh_timed_out(struct scsi_cmnd *scmnd) { +#if IS_ENABLED(CONFIG_SCSI_FC_ATTRS) + if (scmnd->device->host->transportt == fc_transport_template) + return fc_eh_timed_out(scmnd); +#endif return BLK_EH_RESET_TIMER; } -- 2.7.4
