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authorDavid Fries <david@fries.net>2008-10-15 22:04:40 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-10-16 11:21:49 -0700
commit01e14d6db9654be005a0a5384090aea2cde39976 (patch)
tree9db896b843f763a17d97105fbcef597367d50395 /drivers/w1/w1.c
parent0d671b272af9eb06260ab3fd210d454e98dd4216 (diff)
downloadop-kernel-dev-01e14d6db9654be005a0a5384090aea2cde39976.zip
op-kernel-dev-01e14d6db9654be005a0a5384090aea2cde39976.tar.gz
W1: don't delay search start
Move the creation of the w1_process thread to after the device has been initialized. This way w1_process doesn't have to check to see if it has been initialized and the bus search can proceed without sleeping. That also eliminates two checks in the w1_process loop. The sleep now happens at the end of the loop not the beginning. Also added a comment for why the atomic_set was 2. Signed-off-by: David Fries <david@fries.net> Signed-off-by: Evgeniy Polyakov <johnpol@2ka.mipt.ru> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/w1/w1.c')
-rw-r--r--drivers/w1/w1.c19
1 files changed, 6 insertions, 13 deletions
diff --git a/drivers/w1/w1.c b/drivers/w1/w1.c
index aac03f1..730faa4 100644
--- a/drivers/w1/w1.c
+++ b/drivers/w1/w1.c
@@ -813,21 +813,14 @@ int w1_process(void *data)
struct w1_master *dev = (struct w1_master *) data;
while (!kthread_should_stop() && !test_bit(W1_MASTER_NEED_EXIT, &dev->flags)) {
+ if (dev->search_count) {
+ mutex_lock(&dev->mutex);
+ w1_search_process(dev, W1_SEARCH);
+ mutex_unlock(&dev->mutex);
+ }
+
try_to_freeze();
msleep_interruptible(w1_timeout * 1000);
-
- if (kthread_should_stop() || test_bit(W1_MASTER_NEED_EXIT, &dev->flags))
- break;
-
- if (!dev->initialized)
- continue;
-
- if (dev->search_count == 0)
- continue;
-
- mutex_lock(&dev->mutex);
- w1_search_process(dev, W1_SEARCH);
- mutex_unlock(&dev->mutex);
}
atomic_dec(&dev->refcnt);
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