linux-kernel - Re: [PATCH 02/10] drivers:host:fsl: Use ehci

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Date:	Thu, 7 May 2015 10:46:07 -0400 (EDT)
From:	Alan Stern <stern@...land.harvard.edu>
To:	Ramneek Mehresh <ramneek.mehresh@...escale.com>
cc:	linux-kernel@...r.kernel.org, <balbi@...com>,
	<linux-usb@...r.kernel.org>, <gregkh@...uxfoundation.org>
Subject: Re: [PATCH 02/10] drivers:host:fsl: Use ehci_overrides structure
 for EHCI drv

On Thu, 7 May 2015, Ramneek Mehresh wrote:

> Make use of ehci_driver_overrides structure for ehci-fsl
> driver
> 
> Signed-off-by: Ramneek Mehresh <ramneek.mehresh@...escale.com>

You need to change a lot more than this.  See commit a76dd463c58e (USB: 
EHCI: make ehci-orion a separate driver) as an example of what is 
needed.  In the end, ehci-fsl.ko should be a new driver module, not 
compiled into ehci-hcd.ko.

> +	ehci_init_driver(driver, &ehci_fsl_overrides);
> +	driver->product_desc = "Freescale On-Chip EHCI Host Controller";
> +	driver->start = ehci_run;
> +	driver->start_port_reset = ehci_start_port_reset;

Why do you want to override driver->start?  The default value 
for this field is already set to ehci_run.

Alan Stern

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