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]> --- 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 _______________________________________________ barebox mailing list [email protected] http://lists.infradead.org/mailman/listinfo/barebox
