avoid reading fifo rxcount is zero of fifo is empty, hence
read fifo only if rxcount is non-zero
Signed-off-by: Ravi Babu <ravib...@ti.com>
---
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 c9c1ac4..2af45a0 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 > 0) {
+ musb_read_fifo(&musb->endpoints[0], count, buf);
+ req->actual += count;
+ }
csr = MUSB_CSR0_P_SVDRXPKTRDY;
if (count < 64 || req->actual == req->length) {
musb->ep0_state = MUSB_EP0_STAGE_STATUSIN;
--
1.7.0.4
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