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| author | Jiri Slaby <jirislaby@gmail.com> | 2008-10-15 22:04:17 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-10-16 11:21:47 -0700 |
| commit | d05abab9a47d3245664eee413769af2e1e4b1faf (patch) | |
| tree | 85f2e23054300fc6b661e8522ab3b4e6a1fc036f /drivers/char/ds1286.c | |
| parent | 4cea5ceb4c692ff42a2848f1b559977caff3c64e (diff) | |
| download | linux-stable-d05abab9a47d3245664eee413769af2e1e4b1faf.tar.gz linux-stable-d05abab9a47d3245664eee413769af2e1e4b1faf.tar.bz2 linux-stable-d05abab9a47d3245664eee413769af2e1e4b1faf.zip | |
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>
Diffstat (limited to 'drivers/char/ds1286.c')
| -rw-r--r-- | drivers/char/ds1286.c | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/drivers/char/ds1286.c b/drivers/char/ds1286.c index fb584938c9c3..5329d482b582 100644 --- a/drivers/char/ds1286.c +++ b/drivers/char/ds1286.c @@ -443,7 +443,6 @@ static void ds1286_get_time(struct rtc_time *rtc_tm) { 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 @@ static void ds1286_get_time(struct rtc_time *rtc_tm) */ 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 |