mtd: spinand: Fix OOB read

stable inclusion
from stable-5.10.4
commit baad618d078c857f99cc286ea249e9629159901f
bugzilla: 46903

--------------------------------

commit 868cbe2a upstream.

So far OOB have never been used in SPI-NAND, add the missing memcpy to
make it work properly.

Fixes: 7529df46 ("mtd: nand: Add core infrastructure to support SPI NANDs")
Cc: stable@vger.kernel.org
Signed-off-by: NMiquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20201001102014.20100-6-miquel.raynal@bootlin.comSigned-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: NChen Jun <chenjun102@huawei.com>
Acked-by: NXie XiuQi <xiexiuqi@huawei.com>

drivers/mtd/nand/spi/core.c

@@ -318,6 +318,10 @@ static int spinand_write_to_cache_op(struct spinand_device *spinand,
 		buf += ret;
 	}
 
+	if (req->ooblen)
+		memcpy(req->oobbuf.in, spinand->oobbuf + req->ooboffs,
+		       req->ooblen);
+
 	return 0;
 }