[SCSI] hpsa: retry driver initiated commands on busy status
In shared SAS configurations we might get a busy status during driver initiated commands (e.g. during rescan for devices). We should retry the command in such cases rather than giving up. Signed-off-by: Matt Bondurant <Matthew.dav.bondurant@hp.com> Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
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@ -234,6 +234,16 @@ static int check_for_unit_attention(struct ctlr_info *h,
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return 1;
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}
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static int check_for_busy(struct ctlr_info *h, struct CommandList *c)
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{
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if (c->err_info->CommandStatus != CMD_TARGET_STATUS ||
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(c->err_info->ScsiStatus != SAM_STAT_BUSY &&
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c->err_info->ScsiStatus != SAM_STAT_TASK_SET_FULL))
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return 0;
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dev_warn(&h->pdev->dev, HPSA "device busy");
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return 1;
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}
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static ssize_t host_store_rescan(struct device *dev,
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struct device_attribute *attr,
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const char *buf, size_t count)
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@ -1379,7 +1389,8 @@ static void hpsa_scsi_do_simple_cmd_with_retry(struct ctlr_info *h,
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memset(c->err_info, 0, sizeof(*c->err_info));
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hpsa_scsi_do_simple_cmd_core(h, c);
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retry_count++;
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} while (check_for_unit_attention(h, c) && retry_count <= 3);
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} while ((check_for_unit_attention(h, c) ||
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check_for_busy(h, c)) && retry_count <= 3);
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hpsa_pci_unmap(h->pdev, c, 1, data_direction);
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}
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