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fnic: Cleanup the I/O pending with fw and has timed out and is used to issue LUN reset

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In case of LUN reset, the device reset command is issued with one of the
I/Os that has timed out on that LUN. The change is to also return this
I/O with error status set to DID_RESET. In case when the reset is issued
using the sg_reset tool (from sg3_utils) it is a new command and new_sc
is set to 1.  Fnic driver version changed from 1.6.0.19 to 1.6.0.20

[mkp: Fixed checkpatch warning]

Signed-off-by: Satish Kharat <satishkh@cisco.com>
Signed-off-by: Sesidhar Baddela <sebaddel@cisco.com>
Reviewed-by: Ewan Milne <emilne@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Satish Kharat 2016-03-18 11:22:49 -07:00 committed by Martin K. Petersen
parent 691a837c20
commit a36f5dd07d
2 changed files with 29 additions and 11 deletions
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2
drivers/scsi/fnic/fnic.h
View File

@ -39,7 +39,7 @@
#define DRV_NAME "fnic"
#define DRV_DESCRIPTION "Cisco FCoE HBA Driver"
#define DRV_VERSION "1.6.0.19"
#define DRV_VERSION "1.6.0.20"
#define PFX DRV_NAME ": "
#define DFX DRV_NAME "%d: "

38
drivers/scsi/fnic/fnic_scsi.c
View File

@ -2039,7 +2039,9 @@ static inline int fnic_queue_dr_io_req(struct fnic *fnic,
* successfully aborted, 1 otherwise
*/
static int fnic_clean_pending_aborts(struct fnic *fnic,
struct scsi_cmnd *lr_sc)
struct scsi_cmnd *lr_sc,
bool new_sc)
{
int tag, abt_tag;
struct fnic_io_req *io_req;
@ -2057,10 +2059,10 @@ static int fnic_clean_pending_aborts(struct fnic *fnic,
spin_lock_irqsave(io_lock, flags);
sc = scsi_host_find_tag(fnic->lport->host, tag);
/*
* ignore this lun reset cmd or cmds that do not belong to
* this lun
* ignore this lun reset cmd if issued using new SC
* or cmds that do not belong to this lun
*/
if (!sc || sc == lr_sc || sc->device != lun_dev) {
if (!sc || ((sc == lr_sc) && new_sc) || sc->device != lun_dev) {
spin_unlock_irqrestore(io_lock, flags);
continue;
}
@ -2166,11 +2168,27 @@ static int fnic_clean_pending_aborts(struct fnic *fnic,
goto clean_pending_aborts_end;
}
CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE;
CMD_SP(sc) = NULL;
/* original sc used for lr is handled by dev reset code */
if (sc != lr_sc)
CMD_SP(sc) = NULL;
spin_unlock_irqrestore(io_lock, flags);
fnic_release_ioreq_buf(fnic, io_req, sc);
mempool_free(io_req, fnic->io_req_pool);
/* original sc used for lr is handled by dev reset code */
if (sc != lr_sc) {
fnic_release_ioreq_buf(fnic, io_req, sc);
mempool_free(io_req, fnic->io_req_pool);
}
/*
* Any IO is returned during reset, it needs to call scsi_done
* to return the scsi_cmnd to upper layer.
*/
if (sc->scsi_done) {
/* Set result to let upper SCSI layer retry */
sc->result = DID_RESET << 16;
sc->scsi_done(sc);
}
}
schedule_timeout(msecs_to_jiffies(2 * fnic->config.ed_tov));
@ -2264,6 +2282,7 @@ int fnic_device_reset(struct scsi_cmnd *sc)
int tag = 0;
DECLARE_COMPLETION_ONSTACK(tm_done);
int tag_gen_flag = 0; /*to track tags allocated by fnic driver*/
bool new_sc = 0;
/* Wait for rport to unblock */
fc_block_scsi_eh(sc);
@ -2309,13 +2328,12 @@ int fnic_device_reset(struct scsi_cmnd *sc)
* fix the way the EH ioctls work for real, but until
* that happens we fail these explicit requests here.
*/
if (shost_use_blk_mq(sc->device->host))
goto fnic_device_reset_end;
tag = fnic_scsi_host_start_tag(fnic, sc);
if (unlikely(tag == SCSI_NO_TAG))
goto fnic_device_reset_end;
tag_gen_flag = 1;
new_sc = 1;
}
io_lock = fnic_io_lock_hash(fnic, sc);
spin_lock_irqsave(io_lock, flags);
@ -2450,7 +2468,7 @@ int fnic_device_reset(struct scsi_cmnd *sc)
* the lun reset cmd. If all cmds get cleaned, the lun reset
* succeeds
*/
if (fnic_clean_pending_aborts(fnic, sc)) {
if (fnic_clean_pending_aborts(fnic, sc, new_sc)) {
spin_lock_irqsave(io_lock, flags);
io_req = (struct fnic_io_req *)CMD_SP(sc);
FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,