[SCSI] sd: Don't try to spin up drives that are connected to an inactive port
authorMatthew Wilcox <matthew@wil.cx>
Fri, 20 Feb 2009 13:53:48 +0000 (06:53 -0700)
committerJames Bottomley <James.Bottomley@HansenPartnership.com>
Thu, 5 Mar 2009 16:34:37 +0000 (10:34 -0600)
We currently try to spin up drives connected to standby and unavailable
ports.  This will never succeed and wastes a lot of time.  Fail quickly
if the sense data reports the port is in standby or unavailable state.

Reported-by: Narayanan Rengarajan <narayanan.rengarajan@hp.com>
Tested-by: Narayanan Rengarajan <narayanan.rengarajan@hp.com>
Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
drivers/scsi/sd.c

index 55310dbc10a669f6b9cbf3bb5627d9bf8badc171..4970ae4a62d6224cae12e1747296cab4b0ad8791 100644 (file)
@@ -1167,23 +1167,19 @@ sd_spinup_disk(struct scsi_disk *sdkp)
                /*
                 * The device does not want the automatic start to be issued.
                 */
-               if (sdkp->device->no_start_on_add) {
+               if (sdkp->device->no_start_on_add)
                        break;
-               }
-
-               /*
-                * If manual intervention is required, or this is an
-                * absent USB storage device, a spinup is meaningless.
-                */
-               if (sense_valid &&
-                   sshdr.sense_key == NOT_READY &&
-                   sshdr.asc == 4 && sshdr.ascq == 3) {
-                       break;          /* manual intervention required */
 
-               /*
-                * Issue command to spin up drive when not ready
-                */
-               } else if (sense_valid && sshdr.sense_key == NOT_READY) {
+               if (sense_valid && sshdr.sense_key == NOT_READY) {
+                       if (sshdr.asc == 4 && sshdr.ascq == 3)
+                               break;  /* manual intervention required */
+                       if (sshdr.asc == 4 && sshdr.ascq == 0xb)
+                               break;  /* standby */
+                       if (sshdr.asc == 4 && sshdr.ascq == 0xc)
+                               break;  /* unavailable */
+                       /*
+                        * Issue command to spin up drive when not ready
+                        */
                        if (!spintime) {
                                sd_printk(KERN_NOTICE, sdkp, "Spinning up disk...");
                                cmd[0] = START_STOP;