linux-kernel - Re: [v0] usb: ohci: add check for start frame in host controller functional states

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Date:   Wed, 29 Sep 2021 11:22:47 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     zhuyinbo <zhuyinbo@...ngson.cn>
Cc:     Alan Stern <stern@...land.harvard.edu>, linux-usb@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [v0] usb: ohci: add check for start frame in host controller
 functional states

On Wed, Sep 29, 2021 at 04:58:15PM +0800, zhuyinbo wrote:
> 
> 在 2021/9/29 下午3:50, Greg Kroah-Hartman 写道:
> > On Wed, Sep 29, 2021 at 03:40:59PM +0800, Yinbo Zhu wrote:
> > > The pm states of ohci include UsbOperational、UsbReset、UsbSuspend、UsbResume
> > > , among them only the UsbOperational state supports launching the start frame
> > > for host controller according the ohci protocol spec, but in S3/S4 press test
> > > procedure, it may happen that the start frame was launched in other pm states
> > > and cause ohci works abnormally then kernel will allways report rcu CallTrace
> > > . This patch was to add check for start frame in host controller functional
> > > states for fixing above issue.
> > 
> > > Odd use of punctuation :(
> > 
> > > Change-Id: Ic5c2c0a41d01d9396a9452f3eb64acc52b4cbf76
> > > Always run checkpatch.pl on your patches do you do not get grumpy
> > > maintainers asking you to run checkpatch.pl on your patches.
> > 
> > > and what does "v0" on the subject line mean?
> > 
> > > thanks,
> > 
> > > greg k-h
> 
> Hi greg k-h,
> 
> 
> The string "v0" of subject line is patch version,  as for the punctuation
> I'll revise it,
> 
> and I don't find any error that use checkpatch.pl to check patch. then
> please you

You had a Change-Id: in the changelog, that is not needed or allowed in
the kernel tree.

thanks,

greg k-h