diff options
author | Arnd Bergmann <arnd@arndb.de> | 2010-06-01 22:53:06 +0200 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-08-10 13:47:43 -0700 |
commit | 60af22d2ed490554cc92c8d0fed0b5b9cf687568 (patch) | |
tree | 6c9d1b2d9b5c409dc6a38f26ed5b7ec0f37a041a /drivers/serial/68360serial.c | |
parent | be1bc2889a4db4961ef69f47fb471ecae9f23ade (diff) |
tty: reorder ldisc locking
We need to release the BTM in paste_selection() when
sleeping in tty_ldisc_ref_wait to avoid deadlocks
with tty_ldisc_enable.
In tty_set_ldisc, we now always grab the BTM before
taking the ldisc_mutex in order to avoid AB-BA
deadlocks between the two.
tty_ldisc_halt potentially blocks on a workqueue
function that takes the BTM, so we must release
the BTM before calling it.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/serial/68360serial.c')
0 files changed, 0 insertions, 0 deletions