Re: [PATCH] Possible bug fix in the ehci-hcd

[Greg KH <greg@kroah.com>]

On Thu, Feb 07, 2008 at 06:48:32PM +0200, Andy Shevchenko wrote:
> Hi!
> 
> The Sequans company who produce WiMAX chips provides the USB driver and kthp
> addon driver. However the USB device doesn't work correctly.
> 
> Here is more true hack for Sequans SQN11x0 based modem.
> 
> P.S. For more details, please, ask Sequans staff (see Signed-off-by lines).
> 
> Signed-off-by: Andy Shevchenko <andy@smile.org.ua>
> Signed-off-by: Gosne Stephane <sgosne@sequans.com>
> 
> --- a/drivers/usb/host/ehci-q.c.orig	2008-02-07 16:53:18.000000000 +0200
> +++ b/drivers/usb/host/ehci-q.c	2008-02-07 16:53:18.000000000 +0200
> @@ -750,8 +750,14 @@
>  			info1 |= 1 << 14;	/* toggle from qtd */
>  			info2 |= (EHCI_TUNE_MULT_HS << 30);
>  		} else if (type == PIPE_BULK) {
> +			struct usb_device_descriptor *desc = &urb->dev->descriptor;
>  			info1 |= (EHCI_TUNE_RL_HS << 28);
> -			info1 |= 512 << 16;	/* usb2 fixed maxpacket */
> +			/* Special hook for SQN11x0 */
> +			if (desc->idVendor == 0x148e && desc->idProduct == 0x0900) {
> +				info1 |= max_packet (maxp) << 16;
> +			} else {
> +				info1 |= 512 << 16;	/* usb2 fixed maxpacket */
> +			}

We should not be adding hacks for a specific USB device to the host
driver, that's just wrong.

The driver for the device itself should be fixed.

Do you, or anyone else have a pointer to the driver that is causing this
problem?

Andrew, please drop this from your queue.

thanks,

greg k-h