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Commit 729ed6d5 authored by David Brownell's avatar David Brownell Committed by Greg Kroah-Hartman
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USB: ethernet gadget avoids zlps for musb_hdrc 



For systems using the Mentor HDRC controllers we get better TX DMA throughput
if we can avoid falling back to PIO to write zero length packets ... so tell
the driver to avoid ZLPs.

Signed-off-by: default avatarDavid Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 4d6cd483

drivers/usb/gadget/ether.c

+3 −0
Original line number Original line Diff line number Diff line
@@ -2230,6 +2230,9 @@ eth_bind (struct usb_gadget *gadget) 
	if (gadget_is_pxa (gadget)) {

	if (gadget_is_pxa (gadget)) {

		/* pxa doesn't support altsettings */

		/* pxa doesn't support altsettings */

		cdc = 0;

		cdc = 0;

	} else if (gadget_is_musbhdrc(gadget)) {

		/* reduce tx dma overhead by avoiding special cases */

		zlp = 0;

	} else if (gadget_is_sh(gadget)) {

	} else if (gadget_is_sh(gadget)) {

		/* sh doesn't support multiple interfaces or configs */

		/* sh doesn't support multiple interfaces or configs */

		cdc = 0;

		cdc = 0;