Char: ds1286, eliminate busy waiting
ds1286_get_time(); is not called from atomic context, sleep for 20 ms is
better choice than a (home-made) busy waiting for such a situation.
Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Acked-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/char/ds1286.c b/drivers/char/ds1286.c
index fb584938..5329d48 100644
--- a/drivers/char/ds1286.c
+++ b/drivers/char/ds1286.c
@@ -443,7 +443,6 @@
{
unsigned char save_control;
unsigned long flags;
- unsigned long uip_watchdog = jiffies;
/*
* read RTC once any update in progress is done. The update
@@ -456,8 +455,7 @@
*/
if (ds1286_is_updating() != 0)
- while (time_before(jiffies, uip_watchdog + 2*HZ/100))
- barrier();
+ msleep(20);
/*
* Only the values that we read from the RTC are set. We leave