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HID: lg: make transfer buffers DMA capable

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Kernel v4.9 strictly enforces DMA capable buffers, so we need to remove
buffers allocated on the stack.

[jkosina@suse.cz: fix up second usage of hid_hw_raw_request(), spotted by
 0day build bot]
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
Benjamin Tissoires 2016-11-21 11:48:40 +01:00 committed by Jiri Kosina
parent 1ffb3c40ff
commit 061232f0d4
1 changed files with 10 additions and 4 deletions
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14
drivers/hid/hid-lg.c
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@ -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 */ /* Setup wireless link with Logitech Wii wheel */
if (hdev->product == USB_DEVICE_ID_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), 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); HID_FEATURE_REPORT, HID_REQ_SET_REPORT);
if (ret >= 0) { if (ret >= 0) {
/* insert a little delay of 10 jiffies ~ 40ms */ /* insert a little delay of 10 jiffies ~ 40ms */
wait_queue_head_t wait; wait_queue_head_t wait;
@ -772,9 +777,10 @@ static int lg_probe(struct hid_device *hdev, const struct hid_device_id *id)
buf[1] = 0xB2; buf[1] = 0xB2;
get_random_bytes(&buf[2], 2); 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); HID_FEATURE_REPORT, HID_REQ_SET_REPORT);
} }
kfree(buf);
} }
if (drv_data->quirks & LG_FF) if (drv_data->quirks & LG_FF)