scsi: core: Have midlayer retry scsi_mode_sense() UAs

This has scsi_mode_sense() have the SCSI midlayer retry UAs instead of
driving them itself.

Signed-off-by: Mike Christie <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Acked-by: Christoph Hellwig <[email protected]>
Signed-off-by: Martin K. Petersen <[email protected]>

Author: mikechristie

drivers/scsi/scsi_lib.c

@@ -2262,11 +2262,25 @@ scsi_mode_sense(struct scsi_device *sdev, int dbd, int modepage, int subpage,
 	unsigned char cmd[12];
 	int use_10_for_ms;
 	int header_length;
-	int result, retry_count = retries;
+	int result;
 	struct scsi_sense_hdr my_sshdr;
+	struct scsi_failure failure_defs[] = {
+		{
+			.sense = UNIT_ATTENTION,
+			.asc = SCMD_FAILURE_ASC_ANY,
+			.ascq = SCMD_FAILURE_ASCQ_ANY,
+			.allowed = retries,
+			.result = SAM_STAT_CHECK_CONDITION,
+		},
+		{}
+	};
+	struct scsi_failures failures = {
+		.failure_definitions = failure_defs,
+	};
 	const struct scsi_exec_args exec_args = {
 		/* caller might not be interested in sense, but we need it */
 		.sshdr = sshdr ? : &my_sshdr,
+		.failures = &failures,
 	};
 
 	memset(data, 0, sizeof(*data));
@@ -2328,12 +2342,6 @@ scsi_mode_sense(struct scsi_device *sdev, int dbd, int modepage, int subpage,
 					goto retry;
 				}
 			}
-			if (scsi_status_is_check_condition(result) &&
-			    sshdr->sense_key == UNIT_ATTENTION &&
-			    retry_count) {
-				retry_count--;
-				goto retry;
-			}
 		}
 		return -EIO;
 	}