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| author | Andy Shevchenko <andy.shevchenko@gmail.com> | 2017-06-13 11:22:22 +0200 |
|---|---|---|
| committer | Jiri Kosina <jkosina@suse.cz> | 2017-06-13 14:29:20 +0200 |
| commit | 08585e43d22802666a466af1ca5795085e74d60d (patch) | |
| tree | cf43239899fe85d0e70dff3f3f24fe97276a1430 /drivers/hid | |
| parent | HID: i2c-hid: move header file out of I2C realm (diff) | |
| download | linux-08585e43d22802666a466af1ca5795085e74d60d.tar.xz linux-08585e43d22802666a466af1ca5795085e74d60d.zip | |
HID: core: don't use negative operands when shift
The recent C standard in 6.5.7 paragraph 4 defines that operands for
bitwise shift operators should be non-negative, otherwise it's an
undefined behaviour.
Signed-off-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Acked-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'drivers/hid')
| -rw-r--r-- | drivers/hid/hid-core.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c index 37084b645785..8017de4e5c11 100644 --- a/drivers/hid/hid-core.c +++ b/drivers/hid/hid-core.c @@ -1046,7 +1046,7 @@ static s32 snto32(__u32 value, unsigned n) case 16: return ((__s16)value); case 32: return ((__s32)value); } - return value & (1 << (n - 1)) ? value | (-1 << n) : value; + return value & (1 << (n - 1)) ? value | (~0U << n) : value; } s32 hid_snto32(__u32 value, unsigned n) |