diff options
| author | Johan Hovold <johan@kernel.org> | 2020-10-26 11:43:06 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-01-09 13:34:15 +0100 |
| commit | b7f7a2b2b6dc43ad603cfca15726e6b7628dcbed (patch) | |
| tree | e801665d65700a4705ee7e930a6556d270e6cbc4 /include/linux/fpga/fpga-mgr.h | |
| parent | c01db33af603a6b32668d4553cceb712925c03d6 (diff) | |
USB: serial: digi_acceleport: fix write-wakeup deadlocks
[ Upstream commit 5098e77962e7c8947f87bd8c5869c83e000a522a ]
The driver must not call tty_wakeup() while holding its private lock as
line disciplines are allowed to call back into write() from
write_wakeup(), leading to a deadlock.
Also remove the unneeded work struct that was used to defer wakeup in
order to work around a possible race in ancient times (see comment about
n_tty write_chan() in commit 14b54e39b412 ("USB: serial: remove
changelogs and old todo entries")).
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Cc: stable@vger.kernel.org
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/fpga/fpga-mgr.h')
0 files changed, 0 insertions, 0 deletions