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17 May 2024, 11:00:25 UTC
Revision 802c03881f29844af0252b6e22be5d2f65f93fd0 authored by Akinobu Mita on 05 January 2017, 17:14:16 UTC, committed by Greg Kroah-Hartman on 11 January 2017, 08:22:54 UTC 
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>
1 parent 6741f55
History
Tip revision: 802c03881f29844af0252b6e22be5d2f65f93fd0 authored by Akinobu Mita on 05 January 2017, 17:14:16 UTC
sysrq: attach sysrq handler correctly for 32-bit kernel
Tip revision: 802c038
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