[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>

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
 	 */