linux-kernel - Re: [RFC RESEND 00/10] Create separate header for ehci-dbgp driver

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Date:	Mon, 3 Nov 2014 15:09:13 -0800
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	Chris Rorvick <chris@...vick.com>
Cc:	Alan Stern <stern@...land.harvard.edu>,
	Oliver Neukum <oneukum@...e.de>, linux-kernel@...r.kernel.org,
	linux-usb@...r.kernel.org
Subject: Re: [RFC RESEND 00/10] Create separate header for ehci-dbgp driver

On Sun, Nov 02, 2014 at 09:07:47PM -0600, Chris Rorvick wrote:
> One more attempt at getting some feedback.
> 
> Original:
> 
> The FUSBH200 and FOTG210 are not EHCI-compatible and require standalone
> drivers.  See discussion at:
> 
>   http://comments.gmane.org/gmane.linux.usb.general/84169
> 
> But these controllers do implement an EHCI-compatible debug port and
> therefore leverage the ehci-dbgp driver.  Rather than pulling in the
> necessary declarations from <linux/usb/ehci_def.h>, each driver copies
> this code into their own header.  The goal of this series is to pull the
> ehci-dbgp related code into its own header to remove the need for this
> redundancy.
> 
> I have done only minimal testing on this, and I don't use either of
> these controller so my ability to test the changes is limited.  But I
> thought I'd push it out for comment to see if there was interest.
> 
> The only actual change should be when CONFIG_EARLY_PRINTK_DBGP is
> disabled and CONFIG_XEN_DOM0 is enabled.  Currently each of these does
> not notify Xen of reset events under this configuration.  Since these
> events are propagated when CONFIG_EARLY_PRINTK_DBGP and CONFIG_XEN_DOM0
> are both enabled, though, it seems that is not a problem (and maybe not
> sending them in the former case is a bug?)  Regardless, the motivation
> for this change is for consistancy as a step towrads consolidation.  As
> I said above, I am not able to actually test these changes on either
> controller.
> 
> First time submission, so I look forward to any feedback.  If this is of
> any interest I will work on testing the various configations and boot
> parameters.
> 
> Regards,
> 
> Chris Rorvick
> 
> Chris Rorvick (10):
>   usb: Create separate header for ehci-dbgp
>   fusbh200: Make Xen notificaiton consistent with EHCI
>   fusbh200: Remove superfluous macro definitions
>   fusbh200: Remove duplicate ehci-dbgp declarations
>   fusbh200: Use ehci_dbg_port struct
>   fotg210: Make Xen notificaiton consistent with EHCI
>   fotg210: Remove superfluous macro definitions
>   fotg210: Remove duplicate ehci-dbgp declarations
>   fotg210: Use ehci_dbg_port struct
>   usb: Remove __init from early_dbgp_init() prototype
> 
>  drivers/usb/host/fotg210.h    | 62 ++------------------------------
>  drivers/usb/host/fusbh200.h   | 62 ++------------------------------
>  include/linux/usb/ehci-dbgp.h | 83 +++++++++++++++++++++++++++++++++++++++++++
>  include/linux/usb/ehci_def.h  | 65 ++-------------------------------
>  4 files changed, 91 insertions(+), 181 deletions(-)
>  create mode 100644 include/linux/usb/ehci-dbgp.h

It deletes lines of code overall, which looks good to me.  Feel free to
resend without the "RFC" and I will queue it up.

thanks,

greg k-h
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