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>
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@ -1663,6 +1663,15 @@ static void adjust_hpsa_scsi_table(struct ctlr_info *h,
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int nadded, nremoved;
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struct Scsi_Host *sh = NULL;
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/*
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* A reset can cause a device status to change
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* re-schedule the scan to see what happened.
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*/
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if (h->reset_in_progress) {
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h->drv_req_rescan = 1;
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return;
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}
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added = kzalloc(sizeof(*added) * HPSA_MAX_DEVICES, GFP_KERNEL);
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removed = kzalloc(sizeof(*removed) * HPSA_MAX_DEVICES, GFP_KERNEL);
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@ -1771,6 +1780,10 @@ static void adjust_hpsa_scsi_table(struct ctlr_info *h,
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goto free_and_out;
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sh = h->scsi_host;
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if (sh == NULL) {
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dev_warn(&h->pdev->dev, "%s: scsi_host is null\n", __func__);
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goto free_and_out;
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}
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/* Notify scsi mid layer of any removed devices */
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for (i = 0; i < nremoved; i++) {
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if (removed[i] == NULL)
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@ -5234,12 +5247,15 @@ static int hpsa_eh_device_reset_handler(struct scsi_cmnd *scsicmd)
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hpsa_show_dev_msg(KERN_WARNING, h, dev, "resetting");
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h->reset_in_progress = 1;
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/* send a reset to the SCSI LUN which the command was sent to */
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rc = hpsa_do_reset(h, dev, dev->scsi3addr, HPSA_RESET_TYPE_LUN,
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DEFAULT_REPLY_QUEUE);
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snprintf(msg, sizeof(msg), "reset %s",
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rc == 0 ? "completed successfully" : "failed");
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hpsa_show_dev_msg(KERN_WARNING, h, dev, msg);
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h->reset_in_progress = 0;
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return rc == 0 ? SUCCESS : FAILED;
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}
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@ -271,6 +271,7 @@ struct ctlr_info {
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wait_queue_head_t abort_cmd_wait_queue;
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wait_queue_head_t event_sync_wait_queue;
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struct mutex reset_mutex;
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u8 reset_in_progress;
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};
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struct offline_device_entry {
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