From da03e502bb22ec859af4f7d1f7d4d5f237b6c3fe Mon Sep 17 00:00:00 2001 From: Roderick Colenbrander Date: Wed, 16 Nov 2022 08:00:22 -0800 Subject: [PATCH] HID: playstation: fix DualShock4 bluetooth CRC endian issue. The driver was by accident reading the CRC directly from a hardware structure instead of using get_unaligned_le32. Fixes: 2d77474a2392 ("HID: playstation: add DualShock4 bluetooth support.") Reported-by: kernel test robot Signed-off-by: Roderick Colenbrander Signed-off-by: Jiri Kosina --- drivers/hid/hid-playstation.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/hid/hid-playstation.c b/drivers/hid/hid-playstation.c index f5e0d06d3cd8..7b5aef538044 100644 --- a/drivers/hid/hid-playstation.c +++ b/drivers/hid/hid-playstation.c @@ -2131,9 +2131,10 @@ static int dualshock4_parse_report(struct ps_device *ps_dev, struct hid_report * } else if (hdev->bus == BUS_BLUETOOTH && report->id == DS4_INPUT_REPORT_BT && size == DS4_INPUT_REPORT_BT_SIZE) { struct dualshock4_input_report_bt *bt = (struct dualshock4_input_report_bt *)data; + uint32_t report_crc = get_unaligned_le32(&bt->crc32); /* Last 4 bytes of input report contains CRC. */ - if (!ps_check_crc32(PS_INPUT_CRC32_SEED, data, size - 4, bt->crc32)) { + if (!ps_check_crc32(PS_INPUT_CRC32_SEED, data, size - 4, report_crc)) { hid_err(hdev, "DualShock4 input CRC's check failed\n"); return -EILSEQ; }