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HID: uclogic: Fix frame templates for big endian architectures

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commit a6f4f16627 upstream.

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: 867c892544 ("HID: uclogic: Allow to generate frame templates")
Signed-off-by: José Expósito <jose.exposito89@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
José Expósito 2022-11-10 18:49:18 +01:00 committed by Greg Kroah-Hartman
parent d91edca194
commit d25f7d51cb
1 changed files with 1 additions and 1 deletions
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2
drivers/hid/hid-uclogic-rdesc.c
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@ -1119,7 +1119,7 @@ __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 {
p++;