Re: [PATCH 4/8] usb: ehci: add freescale imx28 special write register method

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On Wed, Jan 08, 2014 at 07:22:04PM -0800, Greg KH wrote:
> On Thu, Jan 09, 2014 at 09:36:09AM +0800, Peter Chen wrote:
> > On Tue, Jan 07, 2014 at 04:20:25PM -0800, Greg KH wrote:
> > > On Mon, Jan 06, 2014 at 09:42:26AM +0100, Marc Kleine-Budde wrote:
> > > > Hello Peter and Greg,
> > > > 
> > > > On 01/06/2014 03:10 AM, Peter Chen wrote:
> > > > > According to Freescale imx28 Errata, "ENGR119653 USB: ARM to USB
> > > > > register error issue", All USB register write operations must
> > > > > use the ARM SWP instruction. So, we implement a special ehci_write
> > > > > for imx28.
> > > > > 
> > > > > Discussion for it at below:
> > > > > http://marc.info/?l=linux-usb&m=137996395529294&w=2
> > > > > 
> > > > > Signed-off-by: Peter Chen <peter.chen@xxxxxxxxxxxxx>
> > > > > Acked-by: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
> > > > > Signed-off-by: Marc Kleine-Budde <mkl@xxxxxxxxxxxxxx>
> > > > > Tested-by: Marc Kleine-Budde <mkl@xxxxxxxxxxxxxx>
> > > > 
> > > > please add stable on Cc for this and the next two patches:
> > > > 
> > > > [PATCH 4/8] usb: ehci: add freescale imx28 special write register method
> > > > [PATCH 5/8] usb: chipidea: add freescale imx28 special write register method
> > > > [PATCH 6/8] usb: chipidea: imx: set CI_HDRC_IMX28_WRITE_FIX for imx28
> > > 
> > > How do those patches meet the Documentation/stable_kernel_rules.txt
> > > guidelines?
> > > 
> > > 
> > 
> > - It must be obviously correct and tested.
> > It has Marc Kleine-Budde's tested-by tag.
> > 
> > - It cannot be bigger than 100 lines, with context.
> > I think it is.
> > 
> > - It must fix only one thing.
> > It only fixes the imx28 special write problem.
> > 
> > - It must fix a real bug that bothers people (not a, "This could be a
> > problem..." type thing).
> > Robert Hodaszi reported this problem at below link:
> > http://marc.info/?l=linux-usb&m=137996395529294&w=2
> 
> You are adding new functionality for something that never worked before
> (i.e. new features), which is not ok for stable kernel patches, with the
> exception of new quirks or device ids.
> 
> sorry, this is something new, not a stable kernel patch.
> 

Thanks, I will re-work on that patch and add your comment at
another email.

-- 

Best Regards,
Peter Chen

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