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| author |   Akinobu Mita <akinobu.mita@gmail.com> | 2017-01-06 02:14:16 +0900 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-01-11 09:22:54 +0100 |
| commit | 802c03881f29844af0252b6e22be5d2f65f93fd0 (patch) | |
| tree | f256b13165e919b208c6502228315acdbf11f648 /drivers | |
| parent | Revert "tty: serial: 8250: add CON_CONSDEV to flags" (diff) | |
| download | linux-dev-802c03881f29844af0252b6e22be5d2f65f93fd0.tar.xz linux-dev-802c03881f29844af0252b6e22be5d2f65f93fd0.zip | |
sysrq: attach sysrq handler correctly for 32-bit kernel
The sysrq input handler should be attached to the input device which has
a left alt key.
On 32-bit kernels, some input devices which has a left alt key cannot
attach sysrq handler. Because the keybit bitmap in struct input_device_id
for sysrq is not correctly initialized. KEY_LEFTALT is 56 which is
greater than BITS_PER_LONG on 32-bit kernels.
I found this problem when using a matrix keypad device which defines
a KEY_LEFTALT (56) but doesn't have a KEY_O (24 == 56%32).
Cc: Jiri Slaby <jslaby@suse.com>
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/tty/sysrq.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/tty/sysrq.c b/drivers/tty/sysrq.c index 52bbd27e93ae..701c085bb19b 100644 --- a/drivers/tty/sysrq.c +++ b/drivers/tty/sysrq.c @@ -946,8 +946,8 @@ static const struct input_device_id sysrq_ids[] = { { .flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT, - .evbit = { BIT_MASK(EV_KEY) }, - .keybit = { BIT_MASK(KEY_LEFTALT) }, + .evbit = { [BIT_WORD(EV_KEY)] = BIT_MASK(EV_KEY) }, + .keybit = { [BIT_WORD(KEY_LEFTALT)] = BIT_MASK(KEY_LEFTALT) }, }, { }, }; |