[PATCH v2] mtd: rawnand: pasemi: Don't use static data to track per-device state

[Miquel Raynal]

On Mon, 2023-01-02 at 12:40:51 UTC, =?utf-8?q?Uwe_Kleine-K=C3=B6nig?= wrote:
> 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 at pengutronix.de>

Applied to https://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux.git nand/next, thanks.

Miquel