linux-kernel - [PATCH 4/6] usb: dwc2: gadget: remove dead code from dwc2_hsotg_ep

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Message-Id: <b42a334b3c72059954b781393f5ec8e0bf6cae55.1472502978.git.johnyoun@synopsys.com>
Date:   Mon, 29 Aug 2016 13:38:57 -0700
From:   John Youn <johnyoun@...opsys.com>
To:     Stefan Wahren <stefan.wahren@...e.com>
Cc:     Robert Baldyga <r.baldyga@...sung.com>
Subject: [PATCH 4/6] usb: dwc2: gadget: remove dead code from dwc2_hsotg_ep_enable()

From: Robert Baldyga <r.baldyga@...sung.com>

Since FIFO is always freed in dwc2_hsotg_ep_disable(), ep->fifo_index
is always 0 in dwc2_hsotg_ep_enable(), hence code inside if() block is
never executed.

Signed-off-by: Robert Baldyga <r.baldyga@...sung.com>
Signed-off-by: John Youn <johnyoun@...opsys.com>
---
 drivers/usb/dwc2/gadget.c | 13 +------------
 1 file changed, 1 insertion(+), 12 deletions(-)

diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c
index ac267fd..c8a182c 100644
--- a/drivers/usb/dwc2/gadget.c
+++ b/drivers/usb/dwc2/gadget.c
@@ -3043,22 +3043,11 @@ static int dwc2_hsotg_ep_enable(struct usb_ep *ep,
 		break;
 	}
 
-	/* If fifo is already allocated for this ep */
-	if (hs_ep->fifo_index) {
-		size =  hs_ep->ep.maxpacket * hs_ep->mc;
-		/* If bigger fifo is required deallocate current one */
-		if (size > hs_ep->fifo_size) {
-			hsotg->fifo_map &= ~(1 << hs_ep->fifo_index);
-			hs_ep->fifo_index = 0;
-			hs_ep->fifo_size = 0;
-		}
-	}
-
 	/*
 	 * if the hardware has dedicated fifos, we must give each IN EP
 	 * a unique tx-fifo even if it is non-periodic.
 	 */
-	if (dir_in && hsotg->dedicated_fifos && !hs_ep->fifo_index) {
+	if (dir_in && hsotg->dedicated_fifos) {
 		u32 fifo_index = 0;
 		u32 fifo_size = UINT_MAX;
 		size = hs_ep->ep.maxpacket*hs_ep->mc;
-- 
2.9.0