This is a note to let you know that I've just added the patch titled
mtd: Disable mtdchar mmap on MMU systems
to the 3.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
mtd-disable-mtdchar-mmap-on-mmu-systems.patch
and it can be found in the queue-3.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From f5cf8f07423b2677cebebcebc863af77223a4972 Mon Sep 17 00:00:00 2001
From: David Woodhouse <David.Woodhouse@xxxxxxxxx>
Date: Tue, 9 Oct 2012 15:08:10 +0100
Subject: mtd: Disable mtdchar mmap on MMU systems
From: David Woodhouse <David.Woodhouse@xxxxxxxxx>
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@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/mtd/mtdchar.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
--- a/drivers/mtd/mtdchar.c
+++ b/drivers/mtd/mtdchar.c
@@ -1162,7 +1162,11 @@ static int mtdchar_mmap(struct file *fil
resource_size_t start, off;
unsigned long len, vma_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 = get_vm_offset(vma);
start = map->phys;
len = PAGE_ALIGN((start & ~PAGE_MASK) + map->size);
Patches currently in stable-queue which might be from David.Woodhouse@xxxxxxxxx are
queue-3.4/mtd-disable-mtdchar-mmap-on-mmu-systems.patch
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