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Commit adff5295 authored by Alan Stern's avatar Alan Stern Committed by Greg Kroah-Hartman
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USB: ohci-platform: check for platform data misconfiguration 



The ohci-platform driver checks for misconfigurations in cases where
the Device Tree data specifies big-endian registers or descriptors but
the corresponding driver config settings have not been enabled.  As
Jonas Gorski suggested, we may as well apply the same check to general
platform data too.

This requires moving the code that sets the big-endian quirk flags
from the ohci_platform_reset() routine into ohci_platform_probe(), and
moving the checks out of the DT-specific "if" statement clause.

The patch also changes the text of the error messages in an attempt to
make the nature of the error more clear.

Signed-off-by: default avatarAlan Stern <stern@rowland.harvard.edu>
Reported-by: default avatarJonas Gorski <jogo@openwrt.org>
Acked-by: default avatarHans de Goede <hdegoede@redhat.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 843d5e03

drivers/usb/host/ohci-platform.c

+22 −20
Original line number Diff line number Diff line
@@ -47,10 +47,6 @@ static int ohci_platform_reset(struct usb_hcd *hcd) 
	struct usb_ohci_pdata *pdata = dev_get_platdata(&pdev->dev);

	struct ohci_hcd *ohci = hcd_to_ohci(hcd);



	if (pdata->big_endian_desc)

		ohci->flags |= OHCI_QUIRK_BE_DESC;

	if (pdata->big_endian_mmio)

		ohci->flags |= OHCI_QUIRK_BE_MMIO;

	if (pdata->no_big_frame_no)

		ohci->flags |= OHCI_QUIRK_FRAME_NO;

	if (pdata->num_ports)
@@ -177,22 +173,6 @@ static int ohci_platform_probe(struct platform_device *dev) 
		if (of_property_read_bool(dev->dev.of_node, "big-endian"))

			ohci->flags |= OHCI_QUIRK_BE_MMIO | OHCI_QUIRK_BE_DESC;



#ifndef CONFIG_USB_OHCI_BIG_ENDIAN_MMIO

		if (ohci->flags & OHCI_QUIRK_BE_MMIO) {

			dev_err(&dev->dev,

				"Error big-endian-regs not compiled in\n");

			err = -EINVAL;

			goto err_put_hcd;

		}

#endif

#ifndef CONFIG_USB_OHCI_BIG_ENDIAN_DESC

		if (ohci->flags & OHCI_QUIRK_BE_DESC) {

			dev_err(&dev->dev,

				"Error big-endian-desc not compiled in\n");

			err = -EINVAL;

			goto err_put_hcd;

		}

#endif

		priv->phy = devm_phy_get(&dev->dev, "usb");

		if (IS_ERR(priv->phy)) {

			err = PTR_ERR(priv->phy);
@@ -213,6 +193,28 @@ static int ohci_platform_probe(struct platform_device *dev) 
		}

	}



	if (pdata->big_endian_desc)

		ohci->flags |= OHCI_QUIRK_BE_DESC;

	if (pdata->big_endian_mmio)

		ohci->flags |= OHCI_QUIRK_BE_MMIO;



#ifndef CONFIG_USB_OHCI_BIG_ENDIAN_MMIO

	if (ohci->flags & OHCI_QUIRK_BE_MMIO) {

		dev_err(&dev->dev,

			"Error: CONFIG_USB_OHCI_BIG_ENDIAN_MMIO not set\n");

		err = -EINVAL;

		goto err_put_clks;

	}

#endif

#ifndef CONFIG_USB_OHCI_BIG_ENDIAN_DESC

	if (ohci->flags & OHCI_QUIRK_BE_DESC) {

		dev_err(&dev->dev,

			"Error: CONFIG_USB_OHCI_BIG_ENDIAN_DESC not set\n");

		err = -EINVAL;

		goto err_put_clks;

	}

#endif



	if (pdata->power_on) {

		err = pdata->power_on(dev);

		if (err < 0)