4.4-stable review patch. If anyone has any objections, please let me know.
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From: Roger Quadros rogerq@ti.com
commit 9772b47a4c2916d645c551228b6085ea24acbe5d upstream.
Gadget controller might not be always active during system suspend/resume as gadget driver might not have yet been loaded or might have been unloaded prior to system suspend.
Check if we're active and only then perform necessary actions during suspend/resume.
Signed-off-by: Roger Quadros rogerq@ti.com Signed-off-by: Felipe Balbi felipe.balbi@linux.intel.com Signed-off-by: Arnd Bergmann arnd@arndb.de Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/usb/dwc3/gadget.c | 6 ++++++ 1 file changed, 6 insertions(+)
--- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -2894,6 +2894,9 @@ void dwc3_gadget_exit(struct dwc3 *dwc)
int dwc3_gadget_suspend(struct dwc3 *dwc) { + if (!dwc->gadget_driver) + return 0; + if (dwc->pullups_connected) { dwc3_gadget_disable_irq(dwc); dwc3_gadget_run_stop(dwc, true, true); @@ -2912,6 +2915,9 @@ int dwc3_gadget_resume(struct dwc3 *dwc) struct dwc3_ep *dep; int ret;
+ if (!dwc->gadget_driver) + return 0; + /* Start with SuperSpeed Default */ dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(512);