mtd: Disable mtdchar mmap on MMU systems
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/mtd/mtdchar.c b/drivers/mtd/mtdchar.c
index a6e7451..76afcb4 100644
--- a/drivers/mtd/mtdchar.c
+++ b/drivers/mtd/mtdchar.c
@@ -1162,7 +1162,11 @@
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);