diff options
| author | Benjamin Tissoires <benjamin.tissoires@redhat.com> | 2016-11-21 11:48:40 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-10-05 12:27:37 +0200 |
| commit | 30d86e698c284b42887c5731af390e4957b62fa1 (patch) | |
| tree | 3fcfd2168aaf85d69d1bca3dae49cdb4b826705e /drivers/hid | |
| parent | c03d9a82384cbf6199b597c101f17437e754d8f5 (diff) | |
HID: lg: make transfer buffers DMA capable
commit 061232f0d47fa10103f3efa3e890f002a930d902 upstream.
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/hid')
| -rw-r--r-- | drivers/hid/hid-lg.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/drivers/hid/hid-lg.c b/drivers/hid/hid-lg.c index c690fae02cf8..29403e900f28 100644 --- a/drivers/hid/hid-lg.c +++ b/drivers/hid/hid-lg.c @@ -701,11 +701,16 @@ 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; @@ -717,9 +722,10 @@ static int lg_probe(struct hid_device *hdev, const struct hid_device_id *id) 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) |