diff options
| author | Zhang Bo <zbsdta@126.com> | 2018-02-05 14:56:21 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-03-15 10:54:32 +0100 |
| commit | 89d3fccd8bab549d4202cbe130a2373d45c9641c (patch) | |
| tree | 638568ea953a2d8e52751b8e17c799cc52f6537e /lib/bug.c | |
| parent | 91e019af29cd79e300135f8103338f027cfc27af (diff) | |
Input: matrix_keypad - fix race when disabling interrupts
commit ea4f7bd2aca9f68470e9aac0fc9432fd180b1fe7 upstream.
If matrix_keypad_stop() is executing and the keypad interrupt is triggered,
disable_row_irqs() may be called by both matrix_keypad_interrupt() and
matrix_keypad_stop() at the same time, causing interrupts to be disabled
twice and the keypad being "stuck" after resuming.
Take lock when setting keypad->stopped to ensure that ISR will not race
with matrix_keypad_stop() disabling interrupts.
Signed-off-by: Zhang Bo <zbsdta@126.com>
Cc: stable@vger.kernel.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'lib/bug.c')
0 files changed, 0 insertions, 0 deletions