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mtd: core: handle flashes without OTP gracefully

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There are flash drivers which registers the OTP callbacks although the
flash doesn't support OTP regions and return -ENODATA for these
callbacks if there is no OTP. If this happens, the probe of the whole
flash will fail. Fix it by handling the ENODATA return code and skip
the OTP region nvmem setup.

Fixes: 4b361cfa86 ("mtd: core: add OTP nvmem provider support")
Reported-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Michael Walle <michael@walle.cc>
Tested-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20210707135359.32398-1-michael@walle.cc
This commit is contained in:
Michael Walle 2021-07-07 15:53:59 +02:00 committed by Miquel Raynal
parent e83862ee1b
commit 45bb1faa29
1 changed files with 3 additions and 1 deletions
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4
drivers/mtd/mtdcore.c
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@ -806,7 +806,9 @@ static ssize_t mtd_otp_size(struct mtd_info *mtd, bool is_user)
err:
kfree(info);
return ret;
/* ENODATA means there is no OTP region. */
return ret == -ENODATA ? 0 : ret;
}
static struct nvmem_device *mtd_otp_nvmem_register(struct mtd_info *mtd,