[PATCH v4 27/36] scsi: sd: Have scsi-ml retry sd_sync_cache errors

[Mike Christie <michael.christie@oracle.com>]

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

Signed-off-by: Mike Christie <michael.christie@oracle.com>
Reviewed-by: Martin Wilck <mwilck@suse.com>
---
 drivers/scsi/sd.c | 42 +++++++++++++++++++++---------------------
 1 file changed, 21 insertions(+), 21 deletions(-)

diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index 690884efce8f..c0c29b948476 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -1580,11 +1580,19 @@ static unsigned int sd_check_events(struct gendisk *disk, unsigned int clearing)
 
 static int sd_sync_cache(struct scsi_disk *sdkp, struct scsi_sense_hdr *sshdr)
 {
-	int retries, res;
 	struct scsi_device *sdp = sdkp->device;
 	const int timeout = sdp->request_queue->rq_timeout
 		* SD_FLUSH_TIMEOUT_MULTIPLIER;
 	struct scsi_sense_hdr my_sshdr;
+	struct scsi_failure failures[] = {
+		{
+			.allowed = 3,
+			.result = SCMD_FAILURE_ANY,
+		},
+		{},
+	};
+	static const u8 cmd[10] = { SYNCHRONIZE_CACHE };
+	int res;
 
 	if (!scsi_device_online(sdp))
 		return -ENODEV;
@@ -1593,26 +1601,18 @@ static int sd_sync_cache(struct scsi_disk *sdkp, struct scsi_sense_hdr *sshdr)
 	if (!sshdr)
 		sshdr = &my_sshdr;
 
-	for (retries = 3; retries > 0; --retries) {
-		unsigned char cmd[10] = { 0 };
-
-		cmd[0] = SYNCHRONIZE_CACHE;
-		/*
-		 * Leave the rest of the command zero to indicate
-		 * flush everything.
-		 */
-		res = scsi_exec_req(((struct scsi_exec_args) {
-					.sdev = sdp,
-					.cmd = cmd,
-					.data_dir = DMA_NONE,
-					.sshdr = sshdr,
-					.timeout = timeout,
-					.retries = sdkp->max_retries,
-					.req_flags = RQF_PM }));
-		if (res == 0)
-			break;
-	}
-
+	/*
+	 * Leave the rest of the command zero to indicate flush everything.
+	 */
+	res = scsi_exec_req(((struct scsi_exec_args) {
+				.sdev = sdp,
+				.cmd = cmd,
+				.data_dir = DMA_NONE,
+				.sshdr = sshdr,
+				.timeout = timeout,
+				.retries = sdkp->max_retries,
+				.req_flags = RQF_PM,
+				.failures = failures }));
 	if (res) {
 		sd_print_result(sdkp, "Synchronize Cache(10) failed", res);
 
-- 
2.25.1