[PATCH] libata: add 5s sleep between resets
Some devices react badly if resets are performed back-to-back. Give
devices some time to breath and tell user that we're taking a nap.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
diff --git a/drivers/scsi/libata-core.c b/drivers/scsi/libata-core.c
index 4fd2407..3ddfbe1 100644
--- a/drivers/scsi/libata-core.c
+++ b/drivers/scsi/libata-core.c
@@ -2582,6 +2582,9 @@
rc = ata_do_reset(ap, softreset, postreset, 0, classes);
if (rc == 0 && classes[0] != ATA_DEV_UNKNOWN)
goto done;
+ printk(KERN_INFO "ata%u: softreset failed, will try "
+ "hardreset in 5 secs\n", ap->id);
+ ssleep(5);
}
if (!hardreset)
@@ -2597,10 +2600,20 @@
if (ata_down_sata_spd_limit(ap))
goto done;
+
+ printk(KERN_INFO "ata%u: hardreset failed, will retry "
+ "in 5 secs\n", ap->id);
+ ssleep(5);
}
- if (softreset)
+ if (softreset) {
+ printk(KERN_INFO "ata%u: hardreset succeeded without "
+ "classification, will retry softreset in 5 secs\n",
+ ap->id);
+ ssleep(5);
+
rc = ata_do_reset(ap, softreset, postreset, 0, classes);
+ }
done:
if (rc == 0 && classes[0] == ATA_DEV_UNKNOWN)