Commit fc76051c authored Aug 08, 2013 by Ming Lei Committed by Greg Kroah-Hartman Aug 12, 2013

USB: XHCI: mark no_sg_constraint



This patch marks all xHCI controllers as no_sg_constraint
since xHCI supports building packet from discontinuous buffers.

Cc: Alan Stern <stern@rowland.harvard.edu>
Acked-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Signed-off-by: Ming Lei <ming.lei@canonical.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent bcc48f1a

drivers/usb/host/xhci.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -4841,6 +4841,10 @@ int xhci_gen_setup(struct usb_hcd *hcd, xhci_get_quirks_t get_quirks)

		/* Accept arbitrarily long scatter-gather lists */
		hcd->self.sg_tablesize = ~0;

		/* support to build packet from discontinuous buffers */
		hcd->self.no_sg_constraint = 1;

		/* XHCI controllers don't stop the ep queue on short packets :\| */
		hcd->self.no_stop_on_short = 1;