[SCSI] Fix device not ready printk

Because scsi_print_sense_hdr prefixes with KERN_INFO, the output from
scsi_io_completion looks like:

sd 0:0:0:0: [sdb] Device not ready: <6>: Sense Key : 0x2 [current]
: ASC=0x4 ASCQ=0x3

By using scsi_show_sense_hdr, we can get the much more appealing output:

sd 0:0:0:0: [sdb] Device not ready: Sense Key : 0x2 [current]
sd 0:0:0:0: [sdb] Device not ready: ASC=0x4 ASCQ=0x3

Acked-by: Matthew Wilcox <willy@linux.intel.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

drivers/scsi/constants.c

@@ -1235,6 +1235,20 @@ scsi_print_sense_hdr(const char *name, struct scsi_sense_hdr *sshdr)
 }
 EXPORT_SYMBOL(scsi_print_sense_hdr);
 
+/*
+ * Print normalized SCSI sense header with device information and a prefix.
+ */
+void
+scsi_cmd_print_sense_hdr(struct scsi_cmnd *scmd, const char *desc,
+			  struct scsi_sense_hdr *sshdr)
+{
+	scmd_printk(KERN_INFO, scmd, "%s: ", desc);
+	scsi_show_sense_hdr(sshdr);
+	scmd_printk(KERN_INFO, scmd, "%s: ", desc);
+	scsi_show_extd_sense(sshdr->asc, sshdr->ascq);
+}
+EXPORT_SYMBOL(scsi_cmd_print_sense_hdr);
+
 static void
 scsi_decode_sense_buffer(const unsigned char *sense_buffer, int sense_len,
 		       struct scsi_sense_hdr *sshdr)

drivers/scsi/scsi_lib.c

@@ -944,11 +944,11 @@ void scsi_io_completion(struct scsi_cmnd *cmd, unsigned int good_bytes)
 					break;
 				}
 			}
-			if (!(req->cmd_flags & REQ_QUIET)) {
-				scmd_printk(KERN_INFO, cmd,
-					    "Device not ready: ");
-				scsi_print_sense_hdr("", &sshdr);
-			}
+			if (!(req->cmd_flags & REQ_QUIET))
+				scsi_cmd_print_sense_hdr(cmd,
+							 "Device not ready",
+							 &sshdr);
+
 			scsi_end_request(cmd, 0, this_count, 1);
 			return;
 		case VOLUME_OVERFLOW:

include/scsi/scsi_dbg.h

@@ -9,6 +9,8 @@ extern void __scsi_print_command(unsigned char *);
 extern void scsi_show_extd_sense(unsigned char, unsigned char);
 extern void scsi_show_sense_hdr(struct scsi_sense_hdr *);
 extern void scsi_print_sense_hdr(const char *, struct scsi_sense_hdr *);
+extern void scsi_cmd_print_sense_hdr(struct scsi_cmnd *, const char *,
+				     struct scsi_sense_hdr *);
 extern void scsi_print_sense(char *, struct scsi_cmnd *);
 extern void __scsi_print_sense(const char *name,
 			       const unsigned char *sense_buffer,