[SCSI] qla2xxx: Correct discrepancies during OVERRUN handling on FWI2-capable cards.

For recent ISPs, software must detect OVERRUN conditions by
checking the SS_RESIDUAL_OVER bit during CS_COMPLETE handling.
Update the driver to perform this check, which is consistent with
what earlier firmwares did by explicitly cracking open the
FCP_RSP statuses and returning an CS_DATA_OVERRUN.

Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/drivers/scsi/qla2xxx/qla_isr.c b/drivers/scsi/qla2xxx/qla_isr.c
index 14e6f22944b7..f0337036c7bb 100644
--- a/drivers/scsi/qla2xxx/qla_isr.c
+++ b/drivers/scsi/qla2xxx/qla_isr.c
@@ -958,6 +958,11 @@ qla2x00_status_entry(scsi_qla_host_t *ha, void *pkt)
                 }
         }
 
+        /* Check for overrun. */
+        if (IS_FWI2_CAPABLE(ha) && comp_status == CS_COMPLETE &&
+            scsi_status & SS_RESIDUAL_OVER)
+                comp_status = CS_DATA_OVERRUN;
+
         /*
          * Based on Host and scsi status generate status code for Linux
          */