Input: bcm5974 - set missing URB_NO_TRANSFER_DMA_MAP urb flag

The bcm5974 driver does the allocation and dma mapping of the usb urb
data buffer, but driver does not set the URB_NO_TRANSFER_DMA_MAP flag
to let usb core know the buffer is already mapped.

usb core tries to map the already mapped buffer, causing a warning:
"xhci_hcd 0000:00:14.0: rejecting DMA map of vmalloc memory"

Fix this by setting the URB_NO_TRANSFER_DMA_MAP, letting usb core
know buffer is already mapped by bcm5974 driver

Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Cc: stable@vger.kernel.org
Link: https://bugzilla.kernel.org/show_bug.cgi?id=215890
Link: https://lore.kernel.org/r/20220606113636.588955-1-mathias.nyman@linux.intel.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

diff --git a/drivers/input/mouse/bcm5974.c b/drivers/input/mouse/bcm5974.c
index 59a14505b9cd135d5988c0e20b661b8f171da072..ca150618d32f1863795f390b4ebf4687ea0e36c1 100644 (file)
--- a/drivers/input/mouse/bcm5974.c
+++ b/drivers/input/mouse/bcm5974.c
@@ -942,17 +942,22 @@ static int bcm5974_probe(struct usb_interface *iface,
        if (!dev->tp_data)
                goto err_free_bt_buffer;
 
-       if (dev->bt_urb)
+       if (dev->bt_urb) {
                usb_fill_int_urb(dev->bt_urb, udev,
                                 usb_rcvintpipe(udev, cfg->bt_ep),
                                 dev->bt_data, dev->cfg.bt_datalen,
                                 bcm5974_irq_button, dev, 1);
 
+               dev->bt_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
+       }
+
        usb_fill_int_urb(dev->tp_urb, udev,
                         usb_rcvintpipe(udev, cfg->tp_ep),
                         dev->tp_data, dev->cfg.tp_datalen,
                         bcm5974_irq_trackpad, dev, 1);
 
+       dev->tp_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
+
        /* create bcm5974 device */
        usb_make_path(udev, dev->phys, sizeof(dev->phys));
        strlcat(dev->phys, "/input0", sizeof(dev->phys));