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| author |   Dave Airlie <airlied@redhat.com> | 2019-11-14 05:53:10 +1000 |
|---|---|---|
| committer | Dave Airlie <airlied@redhat.com> | 2019-11-14 05:53:10 +1000 |
| commit | 77e0723bd27f830d0903225372aa778fe2975648 (patch) | |
| tree | 4c035783e014b3a0ac9174390f88dc75150533e4 /drivers/hid/wacom.h | |
| parent | Merge tag 'drm-misc-next-fixes-2019-11-06' of git://anongit.freedesktop.org/drm/drm-misc into drm-next (diff) | |
| parent | Linux 5.4-rc7 (diff) | |
| download | linux-dev-77e0723bd27f830d0903225372aa778fe2975648.tar.xz linux-dev-77e0723bd27f830d0903225372aa778fe2975648.zip | |
Merge v5.4-rc7 into drm-next
We have the i915 security fixes to backmerge, but first
let's clear the decks for other drivers to avoid a bigger
mess.
Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers/hid/wacom.h')
| -rw-r--r-- | drivers/hid/wacom.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/hid/wacom.h b/drivers/hid/wacom.h index 4a7f8d363220..203d27d198b8 100644 --- a/drivers/hid/wacom.h +++ b/drivers/hid/wacom.h @@ -202,6 +202,21 @@ static inline void wacom_schedule_work(struct wacom_wac *wacom_wac, } } +/* + * Convert a signed 32-bit integer to an unsigned n-bit integer. Undoes + * the normally-helpful work of 'hid_snto32' for fields that use signed + * ranges for questionable reasons. + */ +static inline __u32 wacom_s32tou(s32 value, __u8 n) +{ + switch (n) { + case 8: return ((__u8)value); + case 16: return ((__u16)value); + case 32: return ((__u32)value); + } + return value & (1 << (n - 1)) ? value & (~(~0U << n)) : value; +} + extern const struct hid_device_id wacom_ids[]; void wacom_wac_irq(struct wacom_wac *wacom_wac, size_t len); |