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mtd: rawnand: Add status chack in r852_ready()

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commit b79fe18299 upstream.

In r852_ready(), the dev get from r852_get_dev() need to be checked.
An unstable device should not be ready. A proper implementation can
be found in r852_read_byte(). Add a status check and return 0 when it is
unstable.

Fixes: 50a487e771 ("mtd: rawnand: Pass a nand_chip object to chip->dev_ready()")
Cc: stable@vger.kernel.org # v4.20+
Signed-off-by: Wentao Liang <vulab@iscas.ac.cn>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Wentao Liang
2025-04-02 15:56:23 +08:00
committed by Greg Kroah-Hartman
parent 7772621041
commit bfbbef7f1d
1 changed files with 3 additions and 0 deletions
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3
drivers/mtd/nand/raw/r852.c
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@@ -387,6 +387,9 @@ static int r852_wait(struct nand_chip *chip)
static int r852_ready(struct nand_chip *chip)
{
struct r852_device *dev = r852_get_dev(nand_to_mtd(chip));
if (dev->card_unstable)
return 0;
return !(r852_read_reg(dev, R852_CARD_STA) & R852_CARD_STA_BUSY);
}