telephony: phonedev panics if unregistering device not registered [Bug 9266]

Remove panic from phonedev.  See

	http://bugzilla.kernel.org/show_bug.cgi?id=9266

for details (phonedev panics if unregistering device not registered).

Signed-off-by: Matti Linnanvuori <mattilinnanvuori@yahoo.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 2 insertions, 3 deletions

diff --git a/drivers/telephony/phonedev.c b/drivers/telephony/phonedev.c
index 4d8c2a5b3297..bcea8d9b718c 100644
--- a/drivers/telephony/phonedev.c
+++ b/drivers/telephony/phonedev.c
@@ -120,9 +120,8 @@ int phone_register_device(struct phone_device *p, int unit)
 void phone_unregister_device(struct phone_device *pfd)
 {
         mutex_lock(&phone_lock);
-        if (phone_device[pfd->minor] != pfd)
-                panic("phone: bad unregister");
-        phone_device[pfd->minor] = NULL;
+        if (likely(phone_device[pfd->minor] == pfd))
+                phone_device[pfd->minor] = NULL;
         mutex_unlock(&phone_lock);
 }