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usb: appledisplay: Set urb transfer_flags to URB_NO_TRANSFER_DMA_MAP

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The driver does allocate a DMA address with usb_alloc_coherent but did
not set the appropriate flag to signal that transfer_dma is set to a
valid value.

Signed-off-by: Alexander Theissen <alex.theissen@me.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Alexander Theissen 2018-12-04 23:43:36 +01:00 committed by Greg Kroah-Hartman
parent 440da5a30e
commit 67f3a0d0ad
1 changed files with 1 additions and 0 deletions
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1
drivers/usb/misc/appledisplay.c
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@ -260,6 +260,7 @@ static int appledisplay_probe(struct usb_interface *iface,
usb_rcvintpipe(udev, int_in_endpointAddr),
pdata->urbdata, ACD_URB_BUFFER_LEN, appledisplay_complete,
pdata, 1);
pdata->urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
if (usb_submit_urb(pdata->urb, GFP_KERNEL)) {
retval = -EIO;
dev_err(&iface->dev, "Submitting URB failed\n");