diff options
| author | Don Brace <don.brace@pmcs.com> | 2015-11-04 22:50:56 +0100 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2015-11-09 18:34:20 +0100 |
| commit | da03ded045b6249261e6c82d942e6d0298dabc9b (patch) | |
| tree | f042fa9ddcf3800dc04552bb6243012a7897438a | |
| parent | hpsa: correct transfer length for 6 byte read/write commands (diff) | |
| download | linux-da03ded045b6249261e6c82d942e6d0298dabc9b.tar.xz linux-da03ded045b6249261e6c82d942e6d0298dabc9b.zip | |
hpsa: fix hpsa_adjust_hpsa_scsi_table
Fix a NULL pointer issue in the driver when devices are removed
during a reset.
Signed-off-by: Don Brace <don.brace@pmcs.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
| -rw-r--r-- | drivers/scsi/hpsa.c | 16 | ||||
| -rw-r--r-- | drivers/scsi/hpsa.h | 1 |
2 files changed, 17 insertions, 0 deletions
diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c index ae9968b4f766..382cb5d428c7 100644 --- a/drivers/scsi/hpsa.c +++ b/drivers/scsi/hpsa.c @@ -1663,6 +1663,15 @@ static void adjust_hpsa_scsi_table(struct ctlr_info *h, int nadded, nremoved; struct Scsi_Host *sh = NULL; + /* + * A reset can cause a device status to change + * re-schedule the scan to see what happened. + */ + if (h->reset_in_progress) { + h->drv_req_rescan = 1; + return; + } + added = kzalloc(sizeof(*added) * HPSA_MAX_DEVICES, GFP_KERNEL); removed = kzalloc(sizeof(*removed) * HPSA_MAX_DEVICES, GFP_KERNEL); @@ -1771,6 +1780,10 @@ static void adjust_hpsa_scsi_table(struct ctlr_info *h, goto free_and_out; sh = h->scsi_host; + if (sh == NULL) { + dev_warn(&h->pdev->dev, "%s: scsi_host is null\n", __func__); + goto free_and_out; + } /* Notify scsi mid layer of any removed devices */ for (i = 0; i < nremoved; i++) { if (removed[i] == NULL) @@ -5234,12 +5247,15 @@ static int hpsa_eh_device_reset_handler(struct scsi_cmnd *scsicmd) hpsa_show_dev_msg(KERN_WARNING, h, dev, "resetting"); + h->reset_in_progress = 1; + /* send a reset to the SCSI LUN which the command was sent to */ rc = hpsa_do_reset(h, dev, dev->scsi3addr, HPSA_RESET_TYPE_LUN, DEFAULT_REPLY_QUEUE); snprintf(msg, sizeof(msg), "reset %s", rc == 0 ? "completed successfully" : "failed"); hpsa_show_dev_msg(KERN_WARNING, h, dev, msg); + h->reset_in_progress = 0; return rc == 0 ? SUCCESS : FAILED; } diff --git a/drivers/scsi/hpsa.h b/drivers/scsi/hpsa.h index b173c0ee9262..dc113c1a8b37 100644 --- a/drivers/scsi/hpsa.h +++ b/drivers/scsi/hpsa.h @@ -271,6 +271,7 @@ struct ctlr_info { wait_queue_head_t abort_cmd_wait_queue; wait_queue_head_t event_sync_wait_queue; struct mutex reset_mutex; + u8 reset_in_progress; }; struct offline_device_entry { |