[PATCH 3/3] sd: early detection of medium not present

[Alan Stern]

This patch (as696) moves the check for medium not present a bit earlier in 
the sd_spinup_disk() routine.  The existing code will happily continue 
probing even after the device has told it there is no media.



Signed-off-by: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>

---

Index: usb-2.6/drivers/scsi/sd.c
===================================================================
--- usb-2.6.orig/drivers/scsi/sd.c
+++ usb-2.6/drivers/scsi/sd.c
@@ -1046,6 +1046,14 @@ sd_spinup_disk(struct scsi_disk *sdkp, c
 						      &sshdr, SD_TIMEOUT,
 						      SD_MAX_RETRIES);
 
+			/*
+			 * If the drive has indicated to us that it
+			 * doesn't have any media in it, don't bother
+			 * with any of the rest of this crap.
+			 */
+			if (media_not_present(sdkp, &sshdr))
+				return;
+
 			if (the_result)
 				sense_valid = scsi_sense_valid(&sshdr);
 			retries++;
@@ -1054,14 +1062,6 @@ sd_spinup_disk(struct scsi_disk *sdkp, c
 			  ((driver_byte(the_result) & DRIVER_SENSE) &&
 			  sense_valid && sshdr.sense_key == UNIT_ATTENTION)));
 
-		/*
-		 * If the drive has indicated to us that it doesn't have
-		 * any media in it, don't bother with any of the rest of
-		 * this crap.
-		 */
-		if (media_not_present(sdkp, &sshdr))
-			return;
-
 		if ((driver_byte(the_result) & DRIVER_SENSE) == 0) {
 			/* no sense, TUR either succeeded or failed
 			 * with a status error */

-
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