Since Linux 4.6, mtd->priv no longer points to the NAND specific
structure. Under 4.9 it contains NULL, thus using it to access
the fields of the nand_chip structure causes an invalid pointer
dereference.
Update the code to use the mtd_to_nand() helper under 4.9 to obtain
the address of the chip specific data.
Compile tested only.
Fixes: 7bbf4117c6fe ("ar71xx: Add kernel 4.9 support")
Signed-off-by: Gabor Juhos <juh...@freemail.hu>
---
target/linux/ar71xx/files/arch/mips/ath79/mach-c60.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/target/linux/ar71xx/files/arch/mips/ath79/mach-c60.c
b/target/linux/ar71xx/files/arch/mips/ath79/mach-c60.c
index 7b01af515b..144f5db740 100644
--- a/target/linux/ar71xx/files/arch/mips/ath79/mach-c60.c
+++ b/target/linux/ar71xx/files/arch/mips/ath79/mach-c60.c
@@ -180,7 +180,11 @@ static const struct mtd_ooblayout_ops
c60_nand_ecclayout_ops = {
static int c60_nand_scan_fixup(struct mtd_info *mtd)
{
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4,6,0)
struct nand_chip *chip = mtd->priv;
+#else
+ struct nand_chip *chip = mtd_to_nand(mtd);
+#endif
chip->ecc.size = 512;
chip->ecc.strength = 4;
--
2.14.3
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