Re: [regressions] ath11k: v5.12.3 mhi regression

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On Thu, May 20, 2021 at 10:38:12AM -0700, Bhaumik Bhatt wrote:
> On 2021-05-20 05:36 AM, Kalle Valo wrote:
> > Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxx> writes:
> > 
> > > On Thu, May 20, 2021 at 12:02:40PM +0200, Greg KH wrote:
> > > > On Thu, May 20, 2021 at 12:47:53PM +0300, Kalle Valo wrote:
> > > > > Hi,
> > > > >
> > > > > I got several reports that this mhi commit broke ath11k in v5.12.3:
> > > > >
> > > > > commit 29b9829718c5e9bd68fc1c652f5e0ba9b9a64fed
> > > > > Author: Bhaumik Bhatt <bbhatt@xxxxxxxxxxxxxx>
> > > > > Date:   Wed Feb 24 15:23:04 2021 -0800
> > > > >
> > > > >     bus: mhi: core: Process execution environment changes serially
> > > > >
> > > > >     [ Upstream commit ef2126c4e2ea2b92f543fae00a2a0332e4573c48 ]
> > > > >
> > > > > Here are the reports:
> > > > >
> > > > > https://bugzilla.kernel.org/show_bug.cgi?id=213055
> > > > >
> > > > > https://bugzilla.kernel.org/show_bug.cgi?id=212187
> > > > >
> > > > > https://bugs.archlinux.org/task/70849?project=1&string=linux
> > > > >
> > > > > Interestingly v5.13-rc1 seems to work fine, at least for me, though I
> > > > > have not tested v5.12.3 myself. Can someone revert this commit in the
> > > > > stable release so that people get their wifi working again, please?
> > > > 
> > > > How does the mhi bus code relate to a ath11k driver?  What bus
> > > > is that
> > > > on?
> > > > 
> > > 
> > > MHI is the transport used by the ath11k driver to work with the WLAN
> > > devices
> > > over PCIe.
> > > 
> > > Regarding the bug, I'd suggest to wait for Bhaumik (the author of
> > > 29b9829718c5)
> > > to comment on the possible commit which needs backporting from
> > > mainline.
> > 
> > Ok, but if a quick fix is not available I think we should just revert
> > this in the stable releases. I also got a report that v5.11.21 is
> > broken:
> > 
> > https://bugzilla.kernel.org/show_bug.cgi?id=213055#c11
> 
> Please pick [1] as the dependency to [ Upstream commit
> ef2126c4e2ea2b92f543fae00a2a0332e4573c48 ].

what is [1]???

What commit do I need to backport, a commit id would be nice...

thanks,

greg k-h



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