This is a note to let you know that I've just added the patch titled
usb: dwc3: fix implementation of endpoint wedge
to my usb git tree which can be found at
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git
in the usb-linus branch.
The patch will show up in the next release of the linux-next tree
(usually sometime within the next 24 hours during the week.)
The patch will hopefully also be merged in Linus's tree for the
next -rc kernel release.
If you have any questions about this process, please let me know.
>From a535d81c92615b8ffb99b7e1fd1fb01effaed1af Mon Sep 17 00:00:00 2001
From: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
Date: Fri, 1 Nov 2013 12:05:12 -0400
Subject: 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@xxxxxxxxxxxxxxxxxxx>
Tested-by: Pratyush Anand <pratyush.anand@xxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Felipe Balbi <balbi@xxxxxx>
---
drivers/usb/dwc3/ep0.c | 2 ++
drivers/usb/dwc3/gadget.c | 5 +----
2 files changed, 3 insertions(+), 4 deletions(-)
diff --git a/drivers/usb/dwc3/ep0.c b/drivers/usb/dwc3/ep0.c
index 95f7649c..21a35207 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;
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index 5452c0fc..02e44fca 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -1200,9 +1200,6 @@ int __dwc3_gadget_ep_set_halt(struct dwc3_ep *dep, int value)
else
dep->flags |= DWC3_EP_STALL;
} else {
- if (dep->flags & DWC3_EP_WEDGE)
- return 0;
-
ret = dwc3_send_gadget_ep_cmd(dwc, dep->number,
DWC3_DEPCMD_CLEARSTALL, ¶ms);
if (ret)
@@ -1210,7 +1207,7 @@ int __dwc3_gadget_ep_set_halt(struct dwc3_ep *dep, int value)
value ? "set" : "clear",
dep->name);
else
- dep->flags &= ~DWC3_EP_STALL;
+ dep->flags &= ~(DWC3_EP_STALL | DWC3_EP_WEDGE);
}
return ret;
--
1.8.4.3.gca3854a
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