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Re: [PATCH v4 4/6] ath11k: set register access length for MHI driver

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Hi Kalle/Mani,

On 2021-06-14 10:49 AM, Bhaumik Bhatt wrote:
Hi Kalle,

On 2021-06-14 09:02 AM, Kalle Valo wrote:
Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxx> writes:

On Thu, May 06, 2021 at 12:51:43PM -0700, Bhaumik Bhatt wrote:
MHI driver requires register space length to add range checks and
prevent memory region accesses outside of that for MMIO space.
Set it before registering the MHI controller.

Signed-off-by: Bhaumik Bhatt <bbhatt@xxxxxxxxxxxxxx>
Reviewed-by: Hemant Kumar <hemantk@xxxxxxxxxxxxxx>

Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxx>

Kalle, should we do immutable branch for this patch or I can pick it up via MHI tree (if there are no other patches expected from ath11k for this controller)?

I'm not expecting any conflicts with this, and if there are, they should
be easy for Stephen or Linus to fix. So it's easiest to route this via
your tree. But I'm not giving my ack yet, see below.

I'm worried that this patchset breaks bisect. Every patch in the
patchset should not break existing functionality, what if only patches
1-3 are included in the tree but not patch 4? Wouldn't ath11k be broken
then? I didn't review the whole patchset, but I suspect the fix is to
include the ath11k change in the actual mhi patch which changes the
functionality. So that way we would not have a separate ath11k patch at
all.

Also I'm not able to test this patchset at the moment. Can someone else
help and do a quick test with QCA6390 to verify these doesn't break
ath11k?

I have requested someone to try and test this patch series with QCA6390.

I or the testers will get back to you with the test results when they are
available.

As far as your concerns go, you can choose to pick patches 1-3 and that would
be just fine.

Things will break if patchset 4 is _not_ in place with patchset 6 being part of
the tree.

It would, however, be nice to pick the whole series instead and ensure that
the functionality MHI introduces for boot-up sanity is in place for any
controllers such as ath11k.

Thanks,
Bhaumik
---
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project

Just got confirmation that the whole patch series was tested for functional sanity on
Dell E7590 + QCA6390 with Ubuntu18.04 and patch 4/6 is also good to go.

Can you please ACK and pick up this series?

Thanks,
Bhaumik
---
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project



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