From: Paul Zimmerman <Paul.Zimmerman@synopsys.com>
Date: Mon, 25 Nov 2013 21:42:45 +0000 (-0800)
Subject: staging: dwc2: fix thinko in dwc2_fill_host_dma_desc()
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=0b851be2737fa7533facfbf3be46678d180fee80;p=linux-beck.git

staging: dwc2: fix thinko in dwc2_fill_host_dma_desc()

The check against MAX_DMA_DESC_SIZE didn't make sense, fix it

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Paul Zimmerman <paulz@synopsys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/staging/dwc2/hcd_ddma.c b/drivers/staging/dwc2/hcd_ddma.c
index 72e9788c1a13..3376177e4d3c 100644
--- a/drivers/staging/dwc2/hcd_ddma.c
+++ b/drivers/staging/dwc2/hcd_ddma.c
@@ -621,8 +621,8 @@ static void dwc2_fill_host_dma_desc(struct dwc2_hsotg *hsotg,
 	struct dwc2_hcd_dma_desc *dma_desc = &qh->desc_list[n_desc];
 	int len = chan->xfer_len;
 
-	if (len > MAX_DMA_DESC_SIZE)
-		len = MAX_DMA_DESC_SIZE - chan->max_packet + 1;
+	if (len > MAX_DMA_DESC_SIZE - (chan->max_packet - 1))
+		len = MAX_DMA_DESC_SIZE - (chan->max_packet - 1);
 
 	if (chan->ep_is_in) {
 		int num_packets;