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Message-ID: <20210608061018.GY1955@kadam>
Date: Tue, 8 Jun 2021 09:10:18 +0300
From: Dan Carpenter <dan.carpenter@...cle.com>
To: Miquel Raynal <miquel.raynal@...tlin.com>
Cc: Colin King <colin.king@...onical.com>,
Richard Weinberger <richard@....at>,
Vignesh Raghavendra <vigneshr@...com>,
linux-mtd@...ts.infradead.org, kernel-janitors@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH][next] mtd: rawnand: ensure return variable is initialized
On Mon, Jun 07, 2021 at 08:57:11AM +0200, Miquel Raynal wrote:
>
> In the ONFI specification, the sdr_timing_mode field is defined as
> follow:
>
> SDR timing mode support
> BIT VALUE MEANING
> 6-15 N/A Reserved (0)
> 5 1 supports timing mode 5
> 4 1 supports timing mode 4
> 3 1 supports timing mode 3
> 2 1 supports timing mode 2
> 1 1 supports timing mode 1
> 0 1 supports timing mode 0, shall be 1
>
> IOW sdr_timing_modes *cannot* be 0, or it is a truly deep and crazily
> impacting hardware bug (so far I am not aware of any chip not returning
> the right timing mode 0 value). Hence my proposal to turn best_mode as
> unsigned. I honestly don't know what is the best option here and am
> fully open to other suggestions to silence the robot.
If the hardware is broken we should just return -EINVAL.
regards,
dan carpenter
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