linux-kernel - Re: [PATCH 1/1] nvme-pci: add the DISABLE_WRITE

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Message-ID: <20210310200030.GA3377333@dhcp-10-100-145-180.wdc.com>
Date:   Wed, 10 Mar 2021 12:00:30 -0800
From:   Keith Busch <kbusch@...nel.org>
To:     Christoph Hellwig <hch@....de>
Cc:     Dmitry Monakhov <dmtrmonakhov@...dex-team.ru>,
        linux-kernel@...r.kernel.org, linux-nvme@...ts.infradead.org,
        Chaitanya.Kulkarni@....com
Subject: Re: [PATCH 1/1] nvme-pci: add the DISABLE_WRITE_ZEROES quirk for a
 Samsung PM1725a

On Wed, Mar 10, 2021 at 02:41:10PM +0100, Christoph Hellwig wrote:
> On Wed, Mar 10, 2021 at 02:21:56PM +0100, Christoph Hellwig wrote:
> > Can you try this patch instead?
> > 
> > http://lists.infradead.org/pipermail/linux-nvme/2021-February/023183.html
> 
> Actually, please try the patch below instead, it looks like our existing
> logic messes up the units:

This seems like a good opportunity to incorporate TP4040 for non-MDTS
command limits. I sent a proposal here

  http://lists.infradead.org/pipermail/linux-nvme/2021-March/023522.html

And it defaults to your suggestion if the controller doesn't implement
the capability.