From: Christoph Hellwig <hch@lst.de>
To: Keith Busch <kbusch@kernel.org>
Cc: Keith Busch <kbusch@meta.com>,
linux-nvme@lists.infradead.org, hch@lst.de, sagi@grimberg.me
Subject: Re: [PATCH] nvme: remove CC register read-back during enabling
Date: Mon, 23 Sep 2024 14:05:31 +0200 [thread overview]
Message-ID: <20240923120531.GB13481@lst.de> (raw)
In-Reply-To: <ZvEg1Fq6wy7eQ5VV@kbusch-mbp>
On Mon, Sep 23, 2024 at 10:03:32AM +0200, Keith Busch wrote:
> On Wed, Sep 04, 2024 at 02:54:05PM -0700, Keith Busch wrote:
> > From: Keith Busch <kbusch@kernel.org>
> >
> > Any non-posted read should flush the previous write, so we don't
> > necessarily need to read back the value we just wrote. I've found at
> > least some controllers that respond with 0 for short moments after
> > writing the CC register with EN (enable) cleared, so the read-back is
> > overwriting our valid ctrl_config value and ends up breaking on the
> > subsequent enabling.
>
> Ping on this one. Looks okay?
Looks good:
Reviewed-by: Christoph Hellwig <hch@lst.de>
prev parent reply other threads:[~2024-09-23 12:05 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-09-04 21:54 [PATCH] nvme: remove CC register read-back during enabling Keith Busch
2024-09-23 8:03 ` Keith Busch
2024-09-23 12:05 ` Christoph Hellwig [this message]
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