From: Andrew Vasquez <andrew.vasquez@qlogic.com>
Date: Wed, 23 Feb 2011 23:27:14 +0000 (-0800)
Subject: [SCSI] qla2xxx: Adjust FCP_RSP response-info field check after TMF completion.
X-Git-Tag: firefly_0821_release~7613^2~2168^2~39
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=97dec564fd4948e0e560869c80b76e166ca2a83e;p=firefly-linux-kernel-4.4.55.git

[SCSI] qla2xxx: Adjust FCP_RSP response-info field check after TMF completion.

Based on reading of the FCP2/4 specification, the driver cannot
expect the storage device to send FCP_RSP information. Instead,
the driver should interpret the data which is present in the frame
to base decisions on the success or failure of the system.

Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: Madhuranath Iyengar <Madhu.Iyengar@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
---

diff --git a/drivers/scsi/qla2xxx/qla_mbx.c b/drivers/scsi/qla2xxx/qla_mbx.c
index b4a82b5f0f8b..7a7c0ecfe7dd 100644
--- a/drivers/scsi/qla2xxx/qla_mbx.c
+++ b/drivers/scsi/qla2xxx/qla_mbx.c
@@ -2462,22 +2462,19 @@ __qla24xx_issue_tmf(char *name, uint32_t type, struct fc_port *fcport,
 		    "-- completion status (%x).\n", __func__,
 		    vha->host_no, le16_to_cpu(sts->comp_status)));
 		rval = QLA_FUNCTION_FAILED;
-	} else if (!(le16_to_cpu(sts->scsi_status) &
-	    SS_RESPONSE_INFO_LEN_VALID)) {
-		DEBUG2_3_11(printk("%s(%ld): failed to complete IOCB "
-		    "-- no response info (%x).\n", __func__, vha->host_no,
-		    le16_to_cpu(sts->scsi_status)));
-		rval = QLA_FUNCTION_FAILED;
-	} else if (le32_to_cpu(sts->rsp_data_len) < 4) {
-		DEBUG2_3_11(printk("%s(%ld): failed to complete IOCB "
-		    "-- not enough response info (%d).\n", __func__,
-		    vha->host_no, le32_to_cpu(sts->rsp_data_len)));
-		rval = QLA_FUNCTION_FAILED;
-	} else if (sts->data[3]) {
-		DEBUG2_3_11(printk("%s(%ld): failed to complete IOCB "
-		    "-- response (%x).\n", __func__,
-		    vha->host_no, sts->data[3]));
-		rval = QLA_FUNCTION_FAILED;
+	} else if (le16_to_cpu(sts->scsi_status) &
+	    SS_RESPONSE_INFO_LEN_VALID) {
+		if (le32_to_cpu(sts->rsp_data_len) < 4) {
+			DEBUG2_3_11(printk("%s(%ld): ignoring inconsistent "
+			    "data length -- not enough response info (%d).\n",
+			    __func__, vha->host_no,
+			    le32_to_cpu(sts->rsp_data_len)));
+		} else if (sts->data[3]) {
+			DEBUG2_3_11(printk("%s(%ld): failed to complete IOCB "
+			    "-- response (%x).\n", __func__,
+			    vha->host_no, sts->data[3]));
+			rval = QLA_FUNCTION_FAILED;
+		}
 	}
 
 	/* Issue marker IOCB. */