The setting of device speed should be limited by the device's maximum_speed. This patch adds a check and prevent the driver from attempting to configure higher than the maximum_speed. Signed-off-by: Thinh Nguyen <thinhn@xxxxxxxxxxxx> --- Changes in v2: - None drivers/usb/dwc3/gadget.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 2bc29d74e75a..9094690f8258 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -2254,6 +2254,7 @@ static void dwc3_gadget_set_speed(struct usb_gadget *g, enum usb_device_speed speed) { struct dwc3 *dwc = gadget_to_dwc(g); + enum usb_device_speed selected_speed = speed; unsigned long flags; u32 reg; @@ -2278,7 +2279,10 @@ static void dwc3_gadget_set_speed(struct usb_gadget *g, !dwc->dis_metastability_quirk) { reg |= DWC3_DCFG_SUPERSPEED; } else { - switch (speed) { + if (speed > dwc->maximum_speed) + selected_speed = dwc->maximum_speed; + + switch (selected_speed) { case USB_SPEED_LOW: reg |= DWC3_DCFG_LOWSPEED; break; @@ -2298,7 +2302,8 @@ static void dwc3_gadget_set_speed(struct usb_gadget *g, reg |= DWC3_DCFG_SUPERSPEED_PLUS; break; default: - dev_err(dwc->dev, "invalid speed (%d)\n", speed); + dev_err(dwc->dev, "invalid speed (%d)\n", + selected_speed); if (DWC3_IP_IS(DWC3)) reg |= DWC3_DCFG_SUPERSPEED; @@ -2307,7 +2312,7 @@ static void dwc3_gadget_set_speed(struct usb_gadget *g, } } - if (DWC3_IP_IS(DWC32) && speed < USB_SPEED_SUPER_PLUS) + if (DWC3_IP_IS(DWC32) && selected_speed < USB_SPEED_SUPER_PLUS) reg &= ~DWC3_DCFG_NUMLANES(~0); dwc3_writel(dwc->regs, DWC3_DCFG, reg); -- 2.11.0