From: Benjamin Tissoires <benjamin.tissoi...@redhat.com>
commit 061232f0d47fa10103f3efa3e890f002a930d902 upstream.
Kernel v4.9 strictly enforces DMA capable buffers, so we need to remove
buffers allocated on the stack.
[jkos...@suse.cz: fix up second usage of hid_hw_raw_request(), spotted by
0day build bot]
Signed-off-by: Benjamin Tissoires <benjamin.tissoi...@redhat.com>
Signed-off-by: Jiri Kosina <jkos...@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
drivers/hid/hid-lg.c | 14 ++++++++++----
1 file changed, 10 insertions(+), 4 deletions(-)
--- a/drivers/hid/hid-lg.c
+++ b/drivers/hid/hid-lg.c
@@ -701,11 +701,16 @@ static int lg_probe(struct hid_device *h
/* Setup wireless link with Logitech Wii wheel */
if (hdev->product == USB_DEVICE_ID_LOGITECH_WII_WHEEL) {
- unsigned char buf[] = { 0x00, 0xAF, 0x01, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00 };
+ const unsigned char cbuf[] = { 0x00, 0xAF, 0x01, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00 };
+ u8 *buf = kmemdup(cbuf, sizeof(cbuf), GFP_KERNEL);
- ret = hid_hw_raw_request(hdev, buf[0], buf, sizeof(buf),
- HID_FEATURE_REPORT, HID_REQ_SET_REPORT);
+ if (!buf) {
+ ret = -ENOMEM;
+ goto err_free;
+ }
+ ret = hid_hw_raw_request(hdev, buf[0], buf, sizeof(cbuf),
+ HID_FEATURE_REPORT, HID_REQ_SET_REPORT);
if (ret >= 0) {
/* insert a little delay of 10 jiffies ~ 40ms */
wait_queue_head_t wait;
@@ -717,9 +722,10 @@ static int lg_probe(struct hid_device *h
buf[1] = 0xB2;
get_random_bytes(&buf[2], 2);
- ret = hid_hw_raw_request(hdev, buf[0], buf, sizeof(buf),
+ ret = hid_hw_raw_request(hdev, buf[0], buf,
sizeof(cbuf),
HID_FEATURE_REPORT, HID_REQ_SET_REPORT);
}
+ kfree(buf);
}
if (drv_data->quirks & LG_FF)
