linux-kernel - Re: v5.9-rc1 commit reliably breaks pci nvme detection

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Message-ID: <20200817155658.GB1221871@dhcp-10-100-145-180.wdl.wdc.com>
Date:   Mon, 17 Aug 2020 08:56:58 -0700
From:   Keith Busch <kbusch@...nel.org>
To:     "Ahmed S. Darwish" <a.darwish@...utronix.de>
Cc:     Jens Axboe <axboe@...com>, Sagi Grimberg <sagi@...mberg.me>,
        Chaitanya Kulkarni <chaitanya.kulkarni@....com>,
        linux-nvme@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: v5.9-rc1 commit reliably breaks pci nvme detection

On Mon, Aug 17, 2020 at 03:50:11PM +0200, Ahmed S. Darwish wrote:
> Hello,
> 
> Below v5.9-rc1 commit reliably breaks my boot on a Thinkpad e480
> laptop. PCI nvme detection fails, and the kernel becomes not able
> anymore to find the rootfs / parse "root=".
> 
> Bisecting v5.8=>v5.9-rc1 blames that commit. Reverting it *reliably*
> fixes the problem and makes me able to boot v5.9-rc1.

The fix is staged in the nvme tree here:

  http://git.infradead.org/nvme.git/commit/286155561ecd13b6c85a78eaf2880d3baea03b9e