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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: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@kernel.org>
This commit is contained in:
John Youn 2016-02-19 17:31:01 -08:00 committed by Felipe Balbi
parent 5266a7603f
commit 77966eb85e
2 changed files with 22 additions and 5 deletions
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18
drivers/usb/dwc3/core.c
View File

@ -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 */

9
drivers/usb/dwc3/gadget.c
View File

@ -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);