Hello.
On 19-07-2012 11:55, Ajay Kumar Gupta wrote:
There is no need to call read_fifo for zero byte length.
The same as there's no need to write, and not only here?
Signed-off-by: Ajay Kumar Gupta <[email protected]>
---
drivers/usb/musb/musb_gadget_ep0.c | 6 ++++--
1 files changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/usb/musb/musb_gadget_ep0.c
b/drivers/usb/musb/musb_gadget_ep0.c
index e40d764..d762ddb 100644
--- a/drivers/usb/musb/musb_gadget_ep0.c
+++ b/drivers/usb/musb/musb_gadget_ep0.c
@@ -505,8 +505,10 @@ static void ep0_rxstate(struct musb *musb)
req->status = -EOVERFLOW;
count = len;
}
- musb_read_fifo(&musb->endpoints[0], count, buf);
- req->actual += count;
+ if (count) {
+ musb_read_fifo(&musb->endpoints[0], count, buf);
+ req->actual += count;
+ }
Does it save much?
WBR, Sergei
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