From: Stephen M. Cameron <scameron@xxxxxxxxxxxxxxxxxx>
Instead of giving up after 3 immediate retries of driver initiated
commands, back off the rate of retries and retry a bunch more times.
Signed-off-by: Stephen M. Cameron <scameron@xxxxxxxxxxxxxxxxxx>
---
drivers/scsi/hpsa.c | 11 +++++++++--
1 files changed, 9 insertions(+), 2 deletions(-)
diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c
index 5015ac4..cb9d619 100644
--- a/drivers/scsi/hpsa.c
+++ b/drivers/scsi/hpsa.c
@@ -1380,17 +1380,24 @@ static void hpsa_scsi_do_simple_cmd_core_if_no_lockup(struct ctlr_info *h,
}
}
+#define MAX_DRIVER_CMD_RETRIES 25
static void hpsa_scsi_do_simple_cmd_with_retry(struct ctlr_info *h,
struct CommandList *c, int data_direction)
{
- int retry_count = 0;
+ int backoff_time = 10, retry_count = 0;
do {
memset(c->err_info, 0, sizeof(*c->err_info));
hpsa_scsi_do_simple_cmd_core(h, c);
retry_count++;
+ if (retry_count > 3) {
+ msleep(backoff_time);
+ if (backoff_time < 1000)
+ backoff_time *= 2;
+ }
} while ((check_for_unit_attention(h, c) ||
- check_for_busy(h, c)) && retry_count <= 3);
+ check_for_busy(h, c)) &&
+ retry_count <= MAX_DRIVER_CMD_RETRIES);
hpsa_pci_unmap(h->pdev, c, 1, data_direction);
}
--
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