libata: wrap schedule_timeout_uninterruptible() in loop

Tasks in uninterruptible sleep might be woken up by unrelated events
and should check whether the condition it was waiting for has actually
triggered.  Wrap schedule_timeout_uninterruptible() in loop to achieve
it.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index 866ac9d..8aa6140 100644 (file)
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -2183,7 +2183,8 @@ int ata_eh_reset(struct ata_link *link, int classify,
                                "(errno=%d), retrying in %u secs\n",
                                rc, (jiffies_to_msecs(delta) + 999) / 1000);
 
-                       schedule_timeout_uninterruptible(delta);
+                       while (delta)
+                               delta = schedule_timeout_uninterruptible(delta);
                }
 
                if (rc == -EPIPE ||