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usb: host: xhci: check for a valid ring when unmapping bounce buffer

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This way we can remove checks for valid ring from call sites of
xhci_unmap_td_bounce_buffer()

Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Felipe Balbi 2017-01-23 14:20:13 +02:00 committed by Greg Kroah-Hartman
parent f3899a28e2
commit f45e2a0211
1 changed files with 1 additions and 1 deletions
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2
drivers/usb/host/xhci-ring.c
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@ -655,7 +655,7 @@ static void xhci_unmap_td_bounce_buffer(struct xhci_hcd *xhci,
struct xhci_segment *seg = td->bounce_seg;
struct urb *urb = td->urb;
if (!seg || !urb)
if (!ring || !seg || !urb)
return;
if (usb_urb_dir_out(urb)) {