[PATCH v3 26/35] scsi: spi: Have scsi-ml retry spi_execute errors

[Mike Christie <michael.christie@xxxxxxxxxx>]

This has spi_execute have scsi-ml retry errors instead of driving them.

Signed-off-by: Mike Christie <michael.christie@xxxxxxxxxx>
Reviewed-by: Martin Wilck <mwilck@xxxxxxxx>
---
 drivers/scsi/scsi_transport_spi.c | 56 +++++++++++++++++--------------
 1 file changed, 30 insertions(+), 26 deletions(-)

diff --git a/drivers/scsi/scsi_transport_spi.c b/drivers/scsi/scsi_transport_spi.c
index 55d9b13b2f8e..ec5b0f562cf2 100644
--- a/drivers/scsi/scsi_transport_spi.c
+++ b/drivers/scsi/scsi_transport_spi.c
@@ -109,38 +109,42 @@ static int spi_execute(struct scsi_device *sdev, const void *cmd,
 		       void *buffer, unsigned bufflen,
 		       struct scsi_sense_hdr *sshdr)
 {
-	int i, result;
 	unsigned char sense[SCSI_SENSE_BUFFERSIZE];
 	struct scsi_sense_hdr sshdr_tmp;
+	struct scsi_failure failures[] = {
+		{
+			.sense = UNIT_ATTENTION,
+			.asc = SCMD_FAILURE_ASC_ANY,
+			.ascq = SCMD_FAILURE_ASCQ_ANY,
+			.allowed = DV_RETRIES,
+			.result = SAM_STAT_CHECK_CONDITION,
+		},
+		{},
+	};
 
 	if (!sshdr)
 		sshdr = &sshdr_tmp;
 
-	for(i = 0; i < DV_RETRIES; i++) {
-		/*
-		 * The purpose of the RQF_PM flag below is to bypass the
-		 * SDEV_QUIESCE state.
-		 */
-		result = scsi_exec_req(((struct scsi_exec_args) {
-						.sdev = sdev,
-						.cmd = cmd,
-						.data_dir = dir,
-						.buf = buffer,
-						.buf_len = bufflen,
-						.sense = sense,
-						.sense_len = sizeof(sense),
-						.sshdr = sshdr,
-						.timeout = DV_TIMEOUT,
-						.retries = 1,
-						.op_flags = REQ_FAILFAST_DEV |
-							REQ_FAILFAST_TRANSPORT |
-							REQ_FAILFAST_DRIVER,
-						.req_flags = RQF_PM }));
-		if (result < 0 || !scsi_sense_valid(sshdr) ||
-		    sshdr->sense_key != UNIT_ATTENTION)
-			break;
-	}
-	return result;
+	/*
+	 * The purpose of the RQF_PM flag below is to bypass the
+	 * SDEV_QUIESCE state.
+	 */
+	return scsi_exec_req(((struct scsi_exec_args) {
+				.sdev = sdev,
+				.cmd = cmd,
+				.data_dir = dir,
+				.buf = buffer,
+				.buf_len = bufflen,
+				.sense = sense,
+				.sense_len = sizeof(sense),
+				.sshdr = sshdr,
+				.timeout = DV_TIMEOUT,
+				.retries = 1,
+				.op_flags = REQ_FAILFAST_DEV |
+						REQ_FAILFAST_TRANSPORT |
+						REQ_FAILFAST_DRIVER,
+				.req_flags = RQF_PM,
+				.failures = failures }));
 }
 
 static struct {
-- 
2.25.1