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authorMatthew Wilcox <matthew@wil.cx>2009-02-20 06:53:48 -0700
committerJames Bottomley <James.Bottomley@HansenPartnership.com>2009-03-05 10:34:37 -0600
commit33dd6f92a1a7ad85c54d47fd9d73371a32c0bde4 (patch)
tree8390e0a43bac01b4e393d9ec35b8a58823e98da4 /drivers/scsi
parent559595a985e106d2fa9f0c79b7f5805453fed593 (diff)
downloadop-kernel-dev-33dd6f92a1a7ad85c54d47fd9d73371a32c0bde4.zip
op-kernel-dev-33dd6f92a1a7ad85c54d47fd9d73371a32c0bde4.tar.gz
[SCSI] sd: Don't try to spin up drives that are connected to an inactive port
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>
Diffstat (limited to 'drivers/scsi')
-rw-r--r--drivers/scsi/sd.c26
1 files changed, 11 insertions, 15 deletions
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index 55310db..4970ae4 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -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;
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