mtd: rawnand: pasemi: Don't use static data to track per-device state

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Up to now the pasemi nand driver only supported a single device
instance. However the check for that was racy because two parallel calls
of pasemi_nand_probe() could pass the check

	if (pasemi_nand_mtd)
		return -ENODEV;

before any of them assigns a non-NULL value to it.

So rework the driver to make use of per-device driver data.

As an intended side effect the driver can bind more than one device and
also gets rid of the check

	if (!pasemi_nand_mtd)
		return 0;

in the remove callback that could only ever trigger after the above race
happened.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20230102124051.1508424-1-u.kleine-koenig@pengutronix.de

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This commit is contained in:

Uwe Kleine-König 2023-01-02 13:40:51 +01:00 • committed by Miquel Raynal

parent 34569d8695

commit 718004a597

1 changed files with 35 additions and 28 deletions

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drivers/mtd/nand/raw/pasemi_nand.c

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