sdio: make sleep on error interruptable

Make sure we can be woken from the forced sleep that is done on errors.
Removing a card often results in -ENOMEDIUM or -EILSEQ so we previously
locked up the removal process for a second.

We could completely exit on -ENOMEDIUM, but it might be a transient
glitch so treat it like any other error.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>

diff --git a/drivers/mmc/core/sdio_irq.c b/drivers/mmc/core/sdio_irq.c
index c292e12..722924c 100644 (file)
--- a/drivers/mmc/core/sdio_irq.c
+++ b/drivers/mmc/core/sdio_irq.c
@@ -5,6 +5,8 @@
  * Created:     June 18, 2007
  * Copyright:   MontaVista Software Inc.
  *
+ * Copyright 2008 Pierre Ossman
+ *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation; either version 2 of the License, or (at
@@ -107,11 +109,14 @@ static int sdio_irq_thread(void *_host)
 
                /*
                 * Give other threads a chance to run in the presence of
-                * errors.  FIXME: determine if due to card removal and
-                * possibly exit this thread if so.
+                * errors.
                 */
-               if (ret < 0)
-                       ssleep(1);
+               if (ret < 0) {
+                       set_current_state(TASK_INTERRUPTIBLE);
+                       if (!kthread_should_stop())
+                               schedule_timeout(HZ);
+                       set_current_state(TASK_RUNNING);
+               }
 
                /*
                 * Adaptive polling frequency based on the assumption