linux-kernel - Re: [PATCH v2] nvme: update firmware version after commit

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Message-ID: <ZSmd1y+kaZkz1sXq@x1-carbon>
Date:   Fri, 13 Oct 2023 19:43:21 +0000
From:   Niklas Cassel <Niklas.Cassel@....com>
To:     Keith Busch <kbusch@...nel.org>
CC:     Daniel Wagner <dwagner@...e.de>,
        "linux-nvme@...ts.infradead.org" <linux-nvme@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Christoph Hellwig <hch@....de>,
        Kenji Tomonaga <tkenbo@...il.com>
Subject: Re: [PATCH v2] nvme: update firmware version after commit

On Fri, Oct 13, 2023 at 10:43:48AM -0600, Keith Busch wrote:
> On Fri, Oct 13, 2023 at 06:34:20PM +0200, Daniel Wagner wrote:
> >  	if (nvme_get_log(ctrl, NVME_NSID_ALL, NVME_LOG_FW_SLOT, 0, NVME_CSI_NVM,
> > -			log, sizeof(*log), 0))
> > +			 log, sizeof(*log), 0)) {
> >  		dev_warn(ctrl->device, "Get FW SLOT INFO log error\n");
> > +		goto out_free_log;
> > +	}
> > +
> > +	afi = le64_to_cpu(log->afi);
> > +	if (afi & 0x30) {
> 
> That should be 'afi & 0x70'.

Personally, I like GENMASK().
In this specific case it would be GENMASK_ULL(6, 4);

I find that more readable than 0x70.
Although for some reason GENMASK()/GENMASK_ULL() does not
seem to be used in drivers/nvme/


Kind regards,
Niklas