On Tue, Jul 08, 2014 at 09:37:35AM +0200, Zahari Doychev wrote:
> Some mtd device does not support lock and unlock functions. Adding this check
> avoids crashing when mtd_part_lock/unlock are called for such devices.
>
> Signed-off-by: Zahari Doychev <[email protected]>
Applied, thanks
Sascha
> ---
> drivers/mtd/partition.c | 6 ++++++
> 1 file changed, 6 insertions(+)
>
> diff --git a/drivers/mtd/partition.c b/drivers/mtd/partition.c
> index 5c0d46f..5a3d1ae 100644
> --- a/drivers/mtd/partition.c
> +++ b/drivers/mtd/partition.c
> @@ -51,6 +51,9 @@ static int mtd_part_erase(struct mtd_info *mtd, struct
> erase_info *instr)
>
> static int mtd_part_lock(struct mtd_info *mtd, loff_t offset, size_t len)
> {
> + if (!mtd->master->lock)
> + return -ENOSYS;
> +
> if (!(mtd->flags & MTD_WRITEABLE))
> return -EROFS;
>
> @@ -64,6 +67,9 @@ static int mtd_part_lock(struct mtd_info *mtd, loff_t
> offset, size_t len)
>
> static int mtd_part_unlock(struct mtd_info *mtd, loff_t offset, size_t len)
> {
> + if (!mtd->master->unlock)
> + return -ENOSYS;
> +
> if (!(mtd->flags & MTD_WRITEABLE))
> return -EROFS;
>
> --
> 1.7.9.5
>
>
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