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Commit 603fe2b2 authored by Ajay Kumar Gupta's avatar Ajay Kumar Gupta Committed by Felipe Balbi
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usb: musb: check for zero byte in musb_read/write_fifo 



Added a check in musb_{read | write}_fifo for zero byte length.

Signed-off-by: default avatarAjay Kumar Gupta <ajay.gupta@ti.com>
Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
parent d17d535f

drivers/usb/musb/musb_core.c

+6 −0
Original line number Diff line number Diff line
@@ -234,6 +234,9 @@ void musb_write_fifo(struct musb_hw_ep *hw_ep, u16 len, const u8 *src) 
	struct musb *musb = hw_ep->musb;

	void __iomem *fifo = hw_ep->fifo;



	if (unlikely(len == 0))

		return;



	prefetch((u8 *)src);



	dev_dbg(musb->controller, "%cX ep%d fifo %p count %d buf %p\n",
@@ -276,6 +279,9 @@ void musb_read_fifo(struct musb_hw_ep *hw_ep, u16 len, u8 *dst) 
	struct musb *musb = hw_ep->musb;

	void __iomem *fifo = hw_ep->fifo;



	if (unlikely(len == 0))

		return;



	dev_dbg(musb->controller, "%cX ep%d fifo %p count %d buf %p\n",

			'R', hw_ep->epnum, fifo, len, dst);