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SubjectRe: [PATCH] cxacru: ignore cx82310_eth devices
On Sun, Sep 05, 2010 at 10:12:33PM +0200, Ondrej Zary wrote:
> Ignore ADSL routers, which can have the same vendor and product IDs
> as ADSL modems but should be handled by the cx82310_eth driver.
>
> This intentionally ignores device IDs that aren't currently handled
> by cx82310_eth. There may be other device IDs that perhaps shouldn't
> be claimed by cxacru.
>
> Signed-off-by: Ondrej Zary <linux@rainbow-software.org>
>
> --- linux-2.6.36-rc3-orig/drivers/usb/atm/cxacru.c 2010-08-29 17:36:04.000000000 +0200
> +++ linux-2.6.36-rc3/drivers/usb/atm/cxacru.c 2010-09-05 18:54:56.000000000 +0200
> @@ -1324,8 +1324,22 @@ static struct usbatm_driver cxacru_drive
> .tx_padding = 11,
> };
>
> -static int cxacru_usb_probe(struct usb_interface *intf, const struct usb_device_id *id)
> -{
> +static int cxacru_usb_probe(struct usb_interface *intf,
> + const struct usb_device_id *id) {

Ick, what?

Did you run this patch through scripts/checkpatch.pl?

As you didn't change the function arguments, just leave the long line
alone, but even if you did change it, the '{' has to be on the next line
by itself. See Documentation/CodingStyle for details.

> + struct usb_device *usb_dev = interface_to_usbdev(intf);
> + char buf[15];
> +
> + /* avoid ADSL routers (cx82310_eth)
> + * abort if bDeviceClass is 0xff and iProduct is "USB NET CARD" */
> + if (usb_dev->descriptor.bDeviceClass == USB_CLASS_VENDOR_SPEC
> + && usb_string(usb_dev, usb_dev->descriptor.iProduct,
> + buf, sizeof(buf)) > 0) {
> + if (!strcmp(buf, "USB NET CARD")) {
> + dev_info(&intf->dev, "ignoring cx82310_eth device\n");
> + return -ENODEV;
> + }
> + }

In thinking about this a bit more, don't you also want to check the
vendor and product id? You can't always be sure about the string of any
old device, right?

thanks,

greg k-h


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