usb: musb: check for zero byte in musb_read/write_fifo (603fe2b2) · Commits · 戴 / test

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);