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Input: HID items of width 32 (bits) or greater are incorrectly extracted

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due to a masking bug in hid-core.c:extract(). This patch fixes it
       up by forcing the mask to be 64 bits wide.

Signed-off-by: Adam Kropelin <akropel1@rochester.rr.com>
Signed-off-by: Vojtech Pavlik <vojtech@suse.cz>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
This commit is contained in:
Adam Kropelin 2005-05-29 02:30:08 -05:00 committed by Dmitry Torokhov
parent 18098a6c75
commit bef3768d8f
1 changed files with 1 additions and 1 deletions
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2
drivers/usb/input/hid-core.c
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@ -765,7 +765,7 @@ static __inline__ __u32 s32ton(__s32 value, unsigned n)
static __inline__ __u32 extract(__u8 *report, unsigned offset, unsigned n)
{
report += (offset >> 5) << 2; offset &= 31;
return (le64_to_cpu(get_unaligned((__le64*)report)) >> offset) & ((1 << n) - 1);
return (le64_to_cpu(get_unaligned((__le64*)report)) >> offset) & ((1ULL << n) - 1);
}
static __inline__ void implement(__u8 *report, unsigned offset, unsigned n, __u32 value)