usb: dwc3: gadget: don't clear RUN/STOP when it's invalid to do so

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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>

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This commit is contained in:

Baolin Wang 2016-10-14 17:11:33 +08:00 • committed by Felipe Balbi

parent cf68923055

commit bb01473648

3 changed files with 22 additions and 0 deletions

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3

drivers/usb/dwc3/core.h

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2

drivers/usb/dwc3/ep0.c

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17

drivers/usb/dwc3/gadget.c

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