| From | Ben Hutchings <> | Date | Mon, 22 Apr 2013 15:25:59 +0100 | Subject | [68/75] mtd: Disable mtdchar mmap on MMU systems |
| |
3.2.44-rc1 review patch. If anyone has any objections, please let me know.
------------------
From: David Woodhouse <David.Woodhouse@intel.com>
commit f5cf8f07423b2677cebebcebc863af77223a4972 upstream.
This code was broken because it assumed that all MTD devices were map-based. Disable it for now, until it can be fixed properly for the next merge window.
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com> [bwh: Backported to 3.2: adjust context] Signed-off-by: Ben Hutchings <ben@decadent.org.uk> --- drivers/mtd/mtdchar.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)
--- a/drivers/mtd/mtdchar.c +++ b/drivers/mtd/mtdchar.c @@ -1154,7 +1154,11 @@ static int mtd_mmap(struct file *file, s unsigned long off; u32 len; - if (mtd->type == MTD_RAM || mtd->type == MTD_ROM) { + /* This is broken because it assumes the MTD device is map-based + and that mtd->priv is a valid struct map_info. It should be + replaced with something that uses the mtd_get_unmapped_area() + operation properly. */ + if (0 /*mtd->type == MTD_RAM || mtd->type == MTD_ROM*/) { off = vma->vm_pgoff << PAGE_SHIFT; start = map->phys; len = PAGE_ALIGN((start & ~PAGE_MASK) + map->size);
|