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authorGuido Kiener <guido.kiener@rohde-schwarz.com>2019-02-04 19:04:20 +0100
committerFelipe Balbi <felipe.balbi@linux.intel.com>2019-02-06 08:40:09 +0200
commit836bcab50624d728abeab3766f356d54c48ea1b1 (patch)
treea9ace50ed187bc12fbd974e837bfb887594b9f55 /drivers/usb/gadget
parent1e19a520a9258f3c7286826e7172e56bf6da86dc (diff)
udc: net2280: Fix net2280_disable
A reset e.g. calling ep_reset_338x() can happen while endpoints are enabled. The ep_reset_338x() sets ep->desc = NULL to mark endpoint being invalid. A subsequent call of net2280_disable will fail and return -EINVAL to parent function usb_ep_disable(), which will fail, too, and do not set the member ep->enabled = false. See: https://elixir.bootlin.com/linux/v5.0-rc5/source/drivers/usb/gadget/udc/core.c#L139 This fix ignores dp->desc and allows net2280_disable() to succeed. Subsequent calls to usb_ep_enable()/usb_ep_disable() succeeds. Acked-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Guido Kiener <guido.kiener@rohde-schwarz.com> Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Diffstat (limited to 'drivers/usb/gadget')
-rw-r--r--drivers/usb/gadget/udc/net2280.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/usb/gadget/udc/net2280.c b/drivers/usb/gadget/udc/net2280.c
index e7dae5379e04..7154f00dea40 100644
--- a/drivers/usb/gadget/udc/net2280.c
+++ b/drivers/usb/gadget/udc/net2280.c
@@ -516,8 +516,8 @@ static int net2280_disable(struct usb_ep *_ep)
unsigned long flags;
ep = container_of(_ep, struct net2280_ep, ep);
- if (!_ep || !ep->desc || _ep->name == ep0name) {
- pr_err("%s: Invalid ep=%p or ep->desc\n", __func__, _ep);
+ if (!_ep || _ep->name == ep0name) {
+ pr_err("%s: Invalid ep=%p\n", __func__, _ep);
return -EINVAL;
}
spin_lock_irqsave(&ep->dev->lock, flags);