linux-kernel - Re: [PATCH v3 1/2] mtd: spi-nand: Add read retry support

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Message-ID: <87frkmt8nu.fsf@bootlin.com>
Date: Mon, 10 Feb 2025 11:07:33 +0100
From: Miquel Raynal <miquel.raynal@...tlin.com>
To: Cheng Ming Lin <linchengming884@...il.com>
Cc: vigneshr@...com,  linux-mtd@...ts.infradead.org,
  linux-kernel@...r.kernel.org,  richard@....at,  alvinzhou@...c.com.tw,
  leoyu@...c.com.tw,  Cheng Ming Lin <chengminglin@...c.com.tw>
Subject: Re: [PATCH v3 1/2] mtd: spi-nand: Add read retry support

Hello,

>> > +                             ret = spinand->set_read_retry(spinand, retry_mode);
>> > +                             if (ret < 0) {
>> > +                                     ecc_failed = true;
>> > +                                     return ret;
>>
>> Shall we try to set the read_retry level to 0 upon:
>>
>>       if (ret < 0 && retry_mode > 1)
>>
>> ?
>
> If we set the read_retry level to 0 upon, and set_read_retry fails
> when retry_mode equals to 1, it won't return an error. This could
> potentially mask an underlying issue.

Don't save the return value in this case? But otherwise you would leave
the chip in a retry state, no?

Thanks,
Miquèl