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usb: gadget: Correct NULL pointer checking in fsl gadget

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Correct NULL pointer checking for endpoint descriptor
before it gets dereferenced

Signed-off-by: Nikhil Badola <nikhil.badola@freescale.com>
Signed-off-by: Ran Wang <ran.wang_1@nxp.com>
Reviewed-by: Peter Chen <peter.chen@nxp.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
This commit is contained in:
Nikhil Badola 2019-10-21 18:21:53 +08:00 committed by Felipe Balbi
parent eb23c8b4fd
commit 75eaa498c9
1 changed files with 3 additions and 2 deletions
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5
drivers/usb/gadget/udc/fsl_udc_core.c
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@ -1052,10 +1052,11 @@ static int fsl_ep_fifo_status(struct usb_ep *_ep)
u32 bitmask;
struct ep_queue_head *qh;
ep = container_of(_ep, struct fsl_ep, ep);
if (!_ep || (!ep->ep.desc && ep_index(ep) != 0))
if (!_ep || _ep->desc || !(_ep->desc->bEndpointAddress&0xF))
return -ENODEV;
ep = container_of(_ep, struct fsl_ep, ep);
udc = (struct fsl_udc *)ep->udc;
if (!udc->driver || udc->gadget.speed == USB_SPEED_UNKNOWN)