Commit 77966eb8 authored by John Youn's avatar John Youn Committed by Felipe Balbi
Browse files

usb: dwc3: Validate the maximum_speed parameter 



Check that dwc->maximum_speed is set to a valid value. Also add an error
when we use it later if we encounter an invalid value.

Signed-off-by: default avatarJohn Youn <johnyoun@synopsys.com>
Signed-off-by: default avatarFelipe Balbi <balbi@kernel.org>
parent 5266a760

drivers/usb/dwc3/core.c

+16 −2
Original line number Diff line number Diff line
@@ -1012,8 +1012,20 @@ static int dwc3_probe(struct platform_device *pdev) 
		goto err1;

	}



	/* default to superspeed if no maximum_speed passed */

	if (dwc->maximum_speed == USB_SPEED_UNKNOWN) {

	/* Check the maximum_speed parameter */

	switch (dwc->maximum_speed) {

	case USB_SPEED_LOW:

	case USB_SPEED_FULL:

	case USB_SPEED_HIGH:

	case USB_SPEED_SUPER:

	case USB_SPEED_SUPER_PLUS:

		break;

	default:

		dev_err(dev, "invalid maximum_speed parameter %d\n",

			dwc->maximum_speed);

		/* fall through */

	case USB_SPEED_UNKNOWN:

		/* default to superspeed */

		dwc->maximum_speed = USB_SPEED_SUPER;



		/*
@@ -1023,6 +1035,8 @@ static int dwc3_probe(struct platform_device *pdev) 
		    (DWC3_GHWPARAMS3_SSPHY_IFC(dwc->hwparams.hwparams3) ==

		     DWC3_GHWPARAMS3_SSPHY_IFC_GEN2))

			dwc->maximum_speed = USB_SPEED_SUPER_PLUS;



		break;

	}



	/* Adjust Frame Length */

drivers/usb/dwc3/gadget.c

+6 −3
Original line number Diff line number Diff line
@@ -1670,10 +1670,13 @@ static int dwc3_gadget_start(struct usb_gadget *g, 
		case USB_SPEED_SUPER_PLUS:

			reg |= DWC3_DSTS_SUPERSPEED_PLUS;

			break;

		case USB_SPEED_SUPER:	/* FALLTHROUGH */

		case USB_SPEED_UNKNOWN:	/* FALTHROUGH */

		default:

			reg |= DWC3_DSTS_SUPERSPEED;

			dev_err(dwc->dev, "invalid dwc->maximum_speed (%d)\n",

				dwc->maximum_speed);

			/* fall through */

		case USB_SPEED_SUPER:

			reg |= DWC3_DCFG_SUPERSPEED;

			break;

		}

	}

	dwc3_writel(dwc->regs, DWC3_DCFG, reg);