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| author | Baolin Wang <baolin.wang@linaro.org> | 2016-10-14 11:11:33 +0200 |
|---|---|---|
| committer | Felipe Balbi <felipe.balbi@linux.intel.com> | 2016-11-03 09:38:35 +0100 |
| commit | bb0147364850c42db2a0dff5ef018e57413eaf79 (patch) | |
| tree | 64a3f60eb0aa3883832ffbf72f86d46c71521a5a /drivers/usb/dwc3/ep0.c | |
| parent | usb: dwc3: gadget: purge dwc3_stop_active_transfers() (diff) | |
| download | linux-bb0147364850c42db2a0dff5ef018e57413eaf79.tar.xz linux-bb0147364850c42db2a0dff5ef018e57413eaf79.zip | |
usb: dwc3: gadget: don't clear RUN/STOP when it's invalid to do so
When we change the USB function with configfs dynamically, we possibly
met this situation: one core is doing the control transfer, another core
is trying to unregister the USB gadget from userspace, we must wait for
completing this control tranfer, or it will hang the controller to set
the DEVCTRLHLT flag.
[ felipe.balbi@linux.intel.com: several fixes to the patch
- call complete() before starting following SETUP transfer
- add a macro for ep0_in_setup's timeout
- change commit subject slightly
- break lines at 72 characters (git adds an 8-character tab)
- avoid changes to dwc3_gadget_run_stop() ]
Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Diffstat (limited to 'drivers/usb/dwc3/ep0.c')
| -rw-r--r-- | drivers/usb/dwc3/ep0.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/usb/dwc3/ep0.c b/drivers/usb/dwc3/ep0.c index a1f7c2b4b000..15b62a5aaff8 100644 --- a/drivers/usb/dwc3/ep0.c +++ b/drivers/usb/dwc3/ep0.c @@ -284,6 +284,8 @@ void dwc3_ep0_out_start(struct dwc3 *dwc) { int ret; + complete(&dwc->ep0_in_setup); + ret = dwc3_ep0_start_trans(dwc, 0, dwc->ctrl_req_addr, 8, DWC3_TRBCTL_CONTROL_SETUP, false); WARN_ON(ret < 0); |