linux-kernel - Re: [PATCH v8 3/7] mm, devm_memremap

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Message-ID: <20190211195706.GE3908@redhat.com>
Date:   Mon, 11 Feb 2019 14:57:07 -0500
From:   Jerome Glisse <jglisse@...hat.com>
To:     Krzysztof Grygiencz <kfgz@...eria.pl>
Cc:     dan.j.williams@...el.com, akpm@...ux-foundation.org,
        dri-devel@...ts.freedesktop.org, hch@....de,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        logang@...tatee.com, stable@...r.kernel.org,
        torvalds@...ux-foundation.org
Subject: Re: [PATCH v8 3/7] mm, devm_memremap_pages: Fix shutdown handling

On Sun, Feb 10, 2019 at 12:09:08PM +0100, Krzysztof Grygiencz wrote:
> Dear Sir,
> 
> I'm using ArchLinux distribution. After kernel upgrade form 4.19.14 to
> 4.19.15 my X environment stopped working. I have AMD HD3300 (RS780D)
> graphics card. I have bisected kernel and found a failing commit:
> 
> https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v4.19.20&id=ec5471c92fb29ad848c81875840478be201eeb3f

This is a false positive, you should skip that commit. It will not impact
the GPU driver for your specific GPUs. My advice is to first bisect on
drivers/gpu/drm/radeon only.

Cheers,
Jérôme