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authorDon Brace <don.brace@pmcs.com>2015-11-04 22:50:56 +0100
committerMartin K. Petersen <martin.petersen@oracle.com>2015-11-09 18:34:20 +0100
commitda03ded045b6249261e6c82d942e6d0298dabc9b (patch)
treef042fa9ddcf3800dc04552bb6243012a7897438a /drivers/scsi/hpsa.c
parenthpsa: correct transfer length for 6 byte read/write commands (diff)
downloadlinux-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>
Diffstat (limited to 'drivers/scsi/hpsa.c')
-rw-r--r--drivers/scsi/hpsa.c16
1 files changed, 16 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;
}