mtd: nuc900_nand: NULL dereference in nuc900_nand_enable()

commit c69dbbf3335a21aae74376d7e5db50a486d52439 upstream.

Instead of writing to "nand->reg + REG_FMICSR" we write to "REG_FMICSR"
which is NULL and not a valid register.

Fixes: 8bff82cbc308 ('mtd: add nand support for w90p910 (v2)')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/mtd/nand/nuc900_nand.c b/drivers/mtd/nand/nuc900_nand.c
index cd6be2e..14203f3 100644 (file)
--- a/drivers/mtd/nand/nuc900_nand.c
+++ b/drivers/mtd/nand/nuc900_nand.c
@@ -225,7 +225,7 @@ static void nuc900_nand_enable(struct nuc900_nand *nand)
        val = __raw_readl(nand->reg + REG_FMICSR);
 
        if (!(val & NAND_EN))
-               __raw_writel(val | NAND_EN, REG_FMICSR);
+               __raw_writel(val | NAND_EN, nand->reg + REG_FMICSR);
 
        val = __raw_readl(nand->reg + REG_SMCSR);