linux-kernel - [PATCH] usb: gadget: fsl: fix null pointer checking

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Date:   Fri, 16 Oct 2020 12:33:26 +0800
From:   Ran Wang <ran.wang_1@....com>
To:     Li Yang <leoyang.li@....com>, Felipe Balbi <balbi@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Peter Chen <peter.chen@....com>, linux-usb@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
        Ran Wang <ran.wang_1@....com>
Subject: [PATCH] usb: gadget: fsl: fix null pointer checking

fsl_ep_fifo_status() should return error if _ep->desc is null.

Fixes: 75eaa498c99e (“usb: gadget: Correct NULL pointer checking in fsl gadget”)
Signed-off-by: Ran Wang <ran.wang_1@....com>
---
 drivers/usb/gadget/udc/fsl_udc_core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/gadget/udc/fsl_udc_core.c b/drivers/usb/gadget/udc/fsl_udc_core.c
index de528e3..ad6ff9c 100644
--- a/drivers/usb/gadget/udc/fsl_udc_core.c
+++ b/drivers/usb/gadget/udc/fsl_udc_core.c
@@ -1051,7 +1051,7 @@ static int fsl_ep_fifo_status(struct usb_ep *_ep)
 	u32 bitmask;
 	struct ep_queue_head *qh;
 
-	if (!_ep || _ep->desc || !(_ep->desc->bEndpointAddress&0xF))
+	if (!_ep || !_ep->desc || !(_ep->desc->bEndpointAddress&0xF))
 		return -ENODEV;
 
 	ep = container_of(_ep, struct fsl_ep, ep);
-- 
2.7.4