On Thu, 10 Nov 2022, José Expósito wrote:
> When parsing a frame template with a placeholder indicating the number
> of buttons present on the frame its value was incorrectly set on big
> endian architectures due to double little endian conversion.
>
> In order to reproduce the issue and verify the fix, run the HID KUnit
> tests on the PowerPC architecture:
>
> $ ./tools/testing/kunit/kunit.py run --kunitconfig=drivers/hid \
> --arch=powerpc --cross_compile=powerpc64-linux-gnu-
>
> Fixes: 867c89254425 ("HID: uclogic: Allow to generate frame templates")
> Signed-off-by: José Expósito <jose.exposito89@xxxxxxxxx>
> ---
> drivers/hid/hid-uclogic-rdesc.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/hid/hid-uclogic-rdesc.c b/drivers/hid/hid-uclogic-rdesc.c
> index 4bd54c4fb5b0..6b73eb0df6bd 100644
> --- a/drivers/hid/hid-uclogic-rdesc.c
> +++ b/drivers/hid/hid-uclogic-rdesc.c
> @@ -1193,7 +1193,7 @@ __u8 *uclogic_rdesc_template_apply(const __u8 *template_ptr,
> p[sizeof(btn_head)] < param_num) {
> v = param_list[p[sizeof(btn_head)]];
> put_unaligned((__u8)0x2A, p); /* Usage Maximum */
> - put_unaligned_le16((__force u16)cpu_to_le16(v), p + 1);
> + put_unaligned((__force u16)cpu_to_le16(v), (s16 *)(p + 1));
> p += sizeof(btn_head) + 1;
> } else {
Applied to hid.git#for-6.1/upstream-fixes, thanks José.
--
Jiri Kosina
SUSE Labs
