diff options
| author | Christof Schmitt <christof.schmitt@de.ibm.com> | 2007-12-20 12:30:24 +0100 |
|---|---|---|
| committer | James Bottomley <James.Bottomley@HansenPartnership.com> | 2008-01-12 01:29:03 +0100 |
| commit | 951f746fece2e24a26853b3872d16e9013b6fe0b (patch) | |
| tree | c63d1a0a262cb642bd2861b774b647de8f048b18 /drivers/s390 | |
| parent | [SCSI] zfcp: Fix evaluation of port handles in abort handler (diff) | |
| download | linux-951f746fece2e24a26853b3872d16e9013b6fe0b.tar.xz linux-951f746fece2e24a26853b3872d16e9013b6fe0b.zip | |
[SCSI] zfcp: Hold queue lock when checking port/unit handle for abort command
We need to hold the queue-lock when checking whether we still have a valid
unit/port handle for the abort command, i.e whether we can issue this request
for this unit/port. If the error recovery is about to close this unit/port,
then it competes for the queue-lock. If the close request issued by the error
recovery wins, then it is guaranteed that this unit/port has been blocked for
other requests.
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
Signed-off-by: Martin Peschke <mp3@de.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Diffstat (limited to 'drivers/s390')
| -rw-r--r-- | drivers/s390/scsi/zfcp_fsf.c | 21 |
1 files changed, 8 insertions, 13 deletions
diff --git a/drivers/s390/scsi/zfcp_fsf.c b/drivers/s390/scsi/zfcp_fsf.c index e697b1cb6d27..665fcb6ec5d5 100644 --- a/drivers/s390/scsi/zfcp_fsf.c +++ b/drivers/s390/scsi/zfcp_fsf.c @@ -1116,6 +1116,10 @@ zfcp_fsf_abort_fcp_command(unsigned long old_req_id, goto out; } + if (unlikely(!atomic_test_mask(ZFCP_STATUS_COMMON_UNBLOCKED, + &unit->status))) + goto unit_blocked; + sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0); sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; @@ -1131,22 +1135,13 @@ zfcp_fsf_abort_fcp_command(unsigned long old_req_id, zfcp_fsf_start_timer(fsf_req, ZFCP_SCSI_ER_TIMEOUT); retval = zfcp_fsf_req_send(fsf_req); - if (retval) { - ZFCP_LOG_INFO("error: Failed to send abort command request " - "on adapter %s, port 0x%016Lx, unit 0x%016Lx\n", - zfcp_get_busid_by_adapter(adapter), - unit->port->wwpn, unit->fcp_lun); + if (!retval) + goto out; + + unit_blocked: zfcp_fsf_req_free(fsf_req); fsf_req = NULL; - goto out; - } - ZFCP_LOG_DEBUG("Abort FCP Command request initiated " - "(adapter%s, port d_id=0x%06x, " - "unit x%016Lx, old_req_id=0x%lx)\n", - zfcp_get_busid_by_adapter(adapter), - unit->port->d_id, - unit->fcp_lun, old_req_id); out: write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags); return fsf_req; |