From: Andrew Vasquez <andrew.vasquez@qlogic.com>
Date: Tue, 6 Dec 2005 18:58:06 +0000 (-0800)
Subject: [SCSI] qla2xxx: Correct short-WRITE status handling.
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=0da69df1e54146eece38e0a144051f6dd3526821;p=openwrt%2Fstaging%2Fblogic.git

[SCSI] qla2xxx: Correct short-WRITE status handling.

Properly check FC_RESID for any non-transfered bytes
regardless of firmware completion status.

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

diff --git a/drivers/scsi/qla2xxx/qla_isr.c b/drivers/scsi/qla2xxx/qla_isr.c
index 09afc0f06bd4..5181d966fecb 100644
--- a/drivers/scsi/qla2xxx/qla_isr.c
+++ b/drivers/scsi/qla2xxx/qla_isr.c
@@ -909,6 +909,21 @@ qla2x00_status_entry(scsi_qla_host_t *ha, void *pkt)
 			resid = resid_len;
 			cp->resid = resid;
 			CMD_RESID_LEN(cp) = resid;
+
+			if (!lscsi_status &&
+			    ((unsigned)(cp->request_bufflen - resid) <
+			     cp->underflow)) {
+				qla_printk(KERN_INFO, ha,
+				    "scsi(%ld:%d:%d:%d): Mid-layer underflow "
+				    "detected (%x of %x bytes)...returning "
+				    "error status.\n", ha->host_no,
+				    cp->device->channel, cp->device->id,
+				    cp->device->lun, resid,
+				    cp->request_bufflen);
+
+				cp->result = DID_ERROR << 16;
+				break;
+			}
 		}
 		cp->result = DID_OK << 16 | lscsi_status;