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authorDaniel Ritz <daniel.ritz@gmx.ch>2005-09-09 13:03:23 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2005-09-09 13:57:47 -0700
commitbf4de6f2db79f3c396bd884f546cd2ea91a686f2 (patch)
tree6d2dc0b8ba8b91ea75d57c018d3958142c25eaef /drivers/pcmcia
parentb3743fa4442fc172e950ff0eaf6aa96e7d5ce9be (diff)
[PATCH] pcmcia/cs: fix possible missed wakeup
- thread_done should only be completed when the wait_queue is installed. - all wake up conditions should be checked before schedule() this fixes a hang of rmmod in the sequence modprobe yenta_socket; rmmod yenta_socket as reported by Andreas Steinmetz. w/o this rmmod yenta_socket can hang on wait_for_completion() in pcmcia_unregister_socket() Signed-off-by: Daniel Ritz <daniel.ritz@gmx.ch> Cc: Dominik Brodowski <linux@brodo.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/pcmcia')
-rw-r--r--drivers/pcmcia/cs.c9
1 files changed, 5 insertions, 4 deletions
diff --git a/drivers/pcmcia/cs.c b/drivers/pcmcia/cs.c
index e39178fc59d..fabd3529ceb 100644
--- a/drivers/pcmcia/cs.c
+++ b/drivers/pcmcia/cs.c
@@ -654,9 +654,10 @@ static int pccardd(void *__skt)
skt->thread = NULL;
complete_and_exit(&skt->thread_done, 0);
}
- complete(&skt->thread_done);
add_wait_queue(&skt->thread_wait, &wait);
+ complete(&skt->thread_done);
+
for (;;) {
unsigned long flags;
unsigned int events;
@@ -682,11 +683,11 @@ static int pccardd(void *__skt)
continue;
}
- schedule();
- try_to_freeze();
-
if (!skt->thread)
break;
+
+ schedule();
+ try_to_freeze();
}
remove_wait_queue(&skt->thread_wait, &wait);