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| author | Alan Stern <stern@rowland.harvard.edu> | 2013-11-01 12:05:12 -0400 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2014-01-03 04:33:25 +0000 |
| commit | 653106814a7591093b28f23a5d0d207121672781 (patch) | |
| tree | 881b71e0f6a85a70c2d8664838748e7a6e9fde92 /drivers | |
| parent | eeddb0ad331b977136b213d5656d4ab08f52484f (diff) | |
| download | linux-653106814a7591093b28f23a5d0d207121672781.tar.gz linux-653106814a7591093b28f23a5d0d207121672781.tar.bz2 linux-653106814a7591093b28f23a5d0d207121672781.zip | |
usb: dwc3: fix implementation of endpoint wedge
commit a535d81c92615b8ffb99b7e1fd1fb01effaed1af upstream.
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>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/usb/dwc3/ep0.c | 2 | ||||
| -rw-r--r-- | 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 c0dcf698cb7a..c4134e82ed1f 100644 --- a/drivers/usb/dwc3/ep0.c +++ b/drivers/usb/dwc3/ep0.c @@ -394,6 +394,8 @@ static int dwc3_ep0_handle_feature(struct dwc3 *dwc, dep = dwc3_wIndex_to_dep(dwc, ctrl->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 619ee1988732..5f2e3d033c32 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -903,9 +903,6 @@ 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) @@ -913,7 +910,7 @@ 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; |