Kernel v4.9 strictly enforces DMA capable buffers, so we need to remove
buffers allocated on the stack.
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@xxxxxxxxxx>
---
drivers/hid/hid-lg.c | 12 +++++++++---
1 file changed, 9 insertions(+), 3 deletions(-)
diff --git a/drivers/hid/hid-lg.c b/drivers/hid/hid-lg.c
index 76f644d..d4c72a5 100644
--- a/drivers/hid/hid-lg.c
+++ b/drivers/hid/hid-lg.c
@@ -756,11 +756,16 @@ static int lg_probe(struct hid_device *hdev, const struct hid_device_id *id)
/* 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;
@@ -775,6 +780,7 @@ static int lg_probe(struct hid_device *hdev, const struct hid_device_id *id)
ret = hid_hw_raw_request(hdev, buf[0], buf, sizeof(buf),
HID_FEATURE_REPORT, HID_REQ_SET_REPORT);
}
+ kfree(buf);
}
if (drv_data->quirks & LG_FF)
--
2.7.4
--
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