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| author | David Herrmann <dh.herrmann@googlemail.com> | 2011-11-19 13:23:32 +0100 |
|---|---|---|
| committer | Gustavo F. Padovan <padovan@profusion.mobi> | 2011-11-21 14:28:45 -0200 |
| commit | 48b28b8db9a74cc5c43e76485dc397e22bea2984 (patch) | |
| tree | 1381e6eecede87f48603be76da5347d5d2245878 /net/bluetooth/cmtp | |
| parent | 2ac654f740b574c58ee02bac3816cf466a1bfb41 (diff) | |
| download | linux-stable-48b28b8db9a74cc5c43e76485dc397e22bea2984.tar.gz linux-stable-48b28b8db9a74cc5c43e76485dc397e22bea2984.tar.bz2 linux-stable-48b28b8db9a74cc5c43e76485dc397e22bea2984.zip | |
Bluetooth: cmtp: Fix module reference
We cannot call module_put(THIS_MODULE) if this is our last reference. Otherwise,
this call may cleanup our module before it returns.
Gladly, the kthread API provides a simple wrapper for us. So lets use
module_put_and_exit() to avoid a race condition with the module cleanup code.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
Diffstat (limited to 'net/bluetooth/cmtp')
| -rw-r--r-- | net/bluetooth/cmtp/core.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/net/bluetooth/cmtp/core.c b/net/bluetooth/cmtp/core.c index 7d00ddf9e9dc..5a6e634f7fca 100644 --- a/net/bluetooth/cmtp/core.c +++ b/net/bluetooth/cmtp/core.c @@ -67,14 +67,12 @@ static struct cmtp_session *__cmtp_get_session(bdaddr_t *bdaddr) static void __cmtp_link_session(struct cmtp_session *session) { - __module_get(THIS_MODULE); list_add(&session->list, &cmtp_session_list); } static void __cmtp_unlink_session(struct cmtp_session *session) { list_del(&session->list); - module_put(THIS_MODULE); } static void __cmtp_copy_session(struct cmtp_session *session, struct cmtp_conninfo *ci) @@ -327,6 +325,7 @@ static int cmtp_session(void *arg) up_write(&cmtp_session_sem); kfree(session); + module_put_and_exit(0); return 0; } @@ -376,9 +375,11 @@ int cmtp_add_connection(struct cmtp_connadd_req *req, struct socket *sock) __cmtp_link_session(session); + __module_get(THIS_MODULE); session->task = kthread_run(cmtp_session, session, "kcmtpd_ctr_%d", session->num); if (IS_ERR(session->task)) { + module_put(THIS_MODULE); err = PTR_ERR(session->task); goto unlink; } |