From 75d585f3ac4ae26142e2f979941dedb5b682c3b4 Mon Sep 17 00:00:00 2001 From: Ajay Kumar Gupta Date: Fri, 20 Jul 2012 11:07:24 +0530 Subject: [PATCH] --- yaml --- r: 325974 b: refs/heads/master c: 603fe2b21d9fcde2022f9b52d95027bea29fe9e3 h: refs/heads/master v: v3 --- [refs] | 2 +- trunk/drivers/usb/musb/musb_core.c | 6 ++++++ 2 files changed, 7 insertions(+), 1 deletion(-) diff --git a/[refs] b/[refs] index c0503b6c6525..46422ec41d9c 100644 --- a/[refs] +++ b/[refs] @@ -1,2 +1,2 @@ --- -refs/heads/master: d17d535fec07dbd298b3f65838ec8d63c26ab360 +refs/heads/master: 603fe2b21d9fcde2022f9b52d95027bea29fe9e3 diff --git a/trunk/drivers/usb/musb/musb_core.c b/trunk/drivers/usb/musb/musb_core.c index 26f1befb4896..69711e43ac6b 100644 --- a/trunk/drivers/usb/musb/musb_core.c +++ b/trunk/drivers/usb/musb/musb_core.c @@ -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);