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scsi: libfc: reset timeout on queue full

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When we're receiving a timeout we should be checking for queue
full status; if there are still some packets pending we should
be resetting the counter to ensure we're not missing out any
packets which are still queued.

Signed-off-by: Hannes Reinecke <hare@suse.com>
Acked-by: Johannes Thumshirn <jth@kernel.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Hannes Reinecke 2016-10-13 15:10:53 +02:00 committed by Martin K. Petersen
parent 53db8fa8a3
commit ad3120cfe0
2 changed files with 19 additions and 4 deletions
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20
drivers/scsi/libfc/fc_fcp.c
View File

@ -254,8 +254,10 @@ static inline void fc_fcp_unlock_pkt(struct fc_fcp_pkt *fsp)
*/
static void fc_fcp_timer_set(struct fc_fcp_pkt *fsp, unsigned long delay)
{
if (!(fsp->state & FC_SRB_COMPL))
if (!(fsp->state & FC_SRB_COMPL)) {
mod_timer(&fsp->timer, jiffies + delay);
fsp->timer_delay = delay;
}
}
static void fc_fcp_abort_done(struct fc_fcp_pkt *fsp)
@ -932,6 +934,11 @@ static void fc_fcp_resp(struct fc_fcp_pkt *fsp, struct fc_frame *fp)
* Wait a at least one jiffy to see if it is delivered.
* If this expires without data, we may do SRR.
*/
if (fsp->lp->qfull) {
FC_FCP_DBG(fsp, "tgt %6.6x queue busy retry\n",
fsp->rport->port_id);
return;
}
FC_FCP_DBG(fsp, "tgt %6.6x xfer len %zx data underrun "
"len %x, data len %x\n",
fsp->rport->port_id,
@ -1434,8 +1441,15 @@ static void fc_fcp_timeout(unsigned long data)
if (fsp->cdb_cmd.fc_tm_flags)
goto unlock;
FC_FCP_DBG(fsp, "fcp timeout, flags %x state %x\n",
rpriv->flags, fsp->state);
if (fsp->lp->qfull) {
FC_FCP_DBG(fsp, "fcp timeout, resetting timer delay %d\n",
fsp->timer_delay);
setup_timer(&fsp->timer, fc_fcp_timeout, (unsigned long)fsp);
fc_fcp_timer_set(fsp, fsp->timer_delay);
goto unlock;
}
FC_FCP_DBG(fsp, "fcp timeout, delay %d flags %x state %x\n",
fsp->timer_delay, rpriv->flags, fsp->state);
fsp->state |= FC_SRB_FCP_PROCESSING_TMO;
if (rpriv->flags & FC_RP_FLAGS_REC_SUPPORTED)

3
include/scsi/libfc.h
View File

@ -355,7 +355,8 @@ struct fc_fcp_pkt {
/* Timeout/error related information */
struct timer_list timer;
int wait_for_comp;
int wait_for_comp;
int timer_delay;
u32 recov_retry;
struct fc_seq *recov_seq;
struct completion tm_done;