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authorAlan Stern <stern@rowland.harvard.edu>2013-11-01 12:05:12 -0400
committerFelipe Balbi <balbi@ti.com>2013-11-25 10:56:45 -0600
commita535d81c92615b8ffb99b7e1fd1fb01effaed1af (patch)
tree2aa52efe0447fdd839d14936cd87817acabeb53c /drivers/usb/dwc3/ep0.c
parent655403c21236af7b121c8c44618e60ff747acc87 (diff)
usb: dwc3: fix implementation of endpoint wedge
The dwc3 UDC driver doesn't implement endpoint wedging correctly. When an endpoint is wedged, the gadget driver should be allowed to clear the wedge by calling usb_ep_clear_halt(). Only the host is prevented from resetting the endpoint. This patch fixes the implementation. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Tested-by: Pratyush Anand <pratyush.anand@st.com> Cc: <stable@vger.kernel.org> Signed-off-by: Felipe Balbi <balbi@ti.com>
Diffstat (limited to 'drivers/usb/dwc3/ep0.c')
-rw-r--r--drivers/usb/dwc3/ep0.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/usb/dwc3/ep0.c b/drivers/usb/dwc3/ep0.c
index 95f7649c71a..21a352079bc 100644
--- a/drivers/usb/dwc3/ep0.c
+++ b/drivers/usb/dwc3/ep0.c
@@ -459,6 +459,8 @@ static int dwc3_ep0_handle_feature(struct dwc3 *dwc,
dep = dwc3_wIndex_to_dep(dwc, wIndex);
if (!dep)
return -EINVAL;
+ if (set == 0 && (dep->flags & DWC3_EP_WEDGE))
+ break;
ret = __dwc3_gadget_ep_set_halt(dep, set);
if (ret)
return -EINVAL;