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 ].
That is missing in older kernels and did not get backported.
This explains why 5.13.x works.
Thanks,
Bhaumik
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[1]
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/drivers/bus/mhi/core?h=v5.13-rc2&id=4884362f6977fc05cbec736625665241c0e0732f
