4.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Vardan Mikayelyan <mvardan@xxxxxxxxxxxx> [ Upstream commit 755d739534f998d92e348fba8ffb0478416576e7 ] We should call dwc2_hsotg_enqueue_setup() after properly setting lx_state. Because it may cause error-out from dwc2_hsotg_enqueue_setup() due to wrong value in lx_state. Issue can be reproduced by loading driver while connected A-Connector (start in A-HOST mode) then disconnect A-Connector to switch to B-DEVICE. Acked-by: John Youn <johnyoun@xxxxxxxxxxxx> Signed-off-by: Vardan Mikayelyan <mvardan@xxxxxxxxxxxx> Signed-off-by: Grigor Tovmasyan <tovmasya@xxxxxxxxxxxx> Signed-off-by: Felipe Balbi <felipe.balbi@xxxxxxxxxxxxxxx> Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/usb/dwc2/gadget.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) --- a/drivers/usb/dwc2/gadget.c +++ b/drivers/usb/dwc2/gadget.c @@ -2424,12 +2424,6 @@ void dwc2_hsotg_core_init_disconnected(s dwc2_writel(dwc2_hsotg_ep0_mps(hsotg->eps_out[0]->ep.maxpacket) | DXEPCTL_USBACTEP, hsotg->regs + DIEPCTL0); - dwc2_hsotg_enqueue_setup(hsotg); - - dev_dbg(hsotg->dev, "EP0: DIEPCTL0=0x%08x, DOEPCTL0=0x%08x\n", - dwc2_readl(hsotg->regs + DIEPCTL0), - dwc2_readl(hsotg->regs + DOEPCTL0)); - /* clear global NAKs */ val = DCTL_CGOUTNAK | DCTL_CGNPINNAK; if (!is_usb_reset) @@ -2440,6 +2434,12 @@ void dwc2_hsotg_core_init_disconnected(s mdelay(3); hsotg->lx_state = DWC2_L0; + + dwc2_hsotg_enqueue_setup(hsotg); + + dev_dbg(hsotg->dev, "EP0: DIEPCTL0=0x%08x, DOEPCTL0=0x%08x\n", + dwc2_readl(hsotg->regs + DIEPCTL0), + dwc2_readl(hsotg->regs + DOEPCTL0)); } static void dwc2_hsotg_core_disconnect(struct dwc2_hsotg *hsotg)
