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usb: musb: gadget: nuke endpoint before setting its descriptor to NULL

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Some functions, such as f_sourcesink, rely on an endpoint's desc
field during their requests' complete() callback, so clear it only
_after_ nuking all requests to avoid NULL pointer dereference.

Signed-off-by: Tal Shorer <tal.shorer@gmail.com>
Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Tal Shorer 2016-04-25 15:53:29 -05:00 committed by Greg Kroah-Hartman
parent 02da2d7217
commit 607fb0f4d9
1 changed files with 3 additions and 3 deletions
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6
drivers/usb/musb/musb_gadget.c
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@ -1164,12 +1164,12 @@ static int musb_gadget_disable(struct usb_ep *ep)
musb_writew(epio, MUSB_RXMAXP, 0);
}
musb_ep->desc = NULL;
musb_ep->end_point.desc = NULL;
/* abort all pending DMA and requests */
nuke(musb_ep, -ESHUTDOWN);
musb_ep->desc = NULL;
musb_ep->end_point.desc = NULL;
schedule_work(&musb->irq_work);
spin_unlock_irqrestore(&(musb->lock), flags);