From 6dab07df555b652d8d989348b2ce04498d7f9a70 Mon Sep 17 00:00:00 2001 From: Benjamin Tissoires Date: Mon, 21 Nov 2016 11:48:42 +0100 Subject: [PATCH] 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 Signed-off-by: Jiri Kosina --- drivers/hid/hid-rmi.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/drivers/hid/hid-rmi.c b/drivers/hid/hid-rmi.c index 9cd2ca34a6be..be89bcbf6a71 100644 --- a/drivers/hid/hid-rmi.c +++ b/drivers/hid/hid-rmi.c @@ -188,10 +188,16 @@ static int rmi_set_page(struct hid_device *hdev, u8 page) 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);