HID: rmi: make transfer buffers DMA capable
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@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/drivers/hid/hid-rmi.c b/drivers/hid/hid-rmi.c
index 9cd2ca3..be89bcb 100644
--- a/drivers/hid/hid-rmi.c
+++ b/drivers/hid/hid-rmi.c
@@ -188,10 +188,16 @@
static int rmi_set_mode(struct hid_device *hdev, u8 mode)
{
int ret;
- u8 txbuf[2] = {RMI_SET_RMI_MODE_REPORT_ID, mode};
+ const u8 txbuf[2] = {RMI_SET_RMI_MODE_REPORT_ID, mode};
+ u8 *buf;
- ret = hid_hw_raw_request(hdev, RMI_SET_RMI_MODE_REPORT_ID, txbuf,
+ buf = kmemdup(txbuf, sizeof(txbuf), GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
+
+ ret = hid_hw_raw_request(hdev, RMI_SET_RMI_MODE_REPORT_ID, buf,
sizeof(txbuf), HID_FEATURE_REPORT, HID_REQ_SET_REPORT);
+ kfree(buf);
if (ret < 0) {
dev_err(&hdev->dev, "unable to set rmi mode to %d (%d)\n", mode,
ret);
