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Andreas Persson 779a0f4347 mtd: cfi_cmdset_0002: fix crash when erasing/writing AMD cards

commit 2394e62873 upstream.

Erasing an AMD linear flash card (AM29F016D) crashes after the first
sector has been erased. Likewise, writing to it crashes after two bytes
have been written. The reason is a missing check for a null pointer -
the cmdset_priv field is not set for this type of card.

Fixes: 4844ef8030 ("mtd: cfi_cmdset_0002: Add support for polling status register")
Signed-off-by: Andreas Persson <andreasp56@outlook.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/DB6P189MB05830B3530B8087476C5CFE4C1159@DB6P189MB0583.EURP189.PROD.OUTLOOK.COM
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2021-08-26 08:35:33 -04:00

cfi_cmdset_0001.c

mtd: cfi_cmdset_0001: Support the absence of protection registers

2020-04-30 23:42:57 +05:30

cfi_cmdset_0002.c

mtd: cfi_cmdset_0002: fix crash when erasing/writing AMD cards

2021-08-26 08:35:33 -04:00

cfi_cmdset_0020.c

mtd: Convert fallthrough comments into statements

2020-03-30 10:14:54 +02:00

cfi_probe.c

mtd: cfi: Add early fixup for S70GL02GS