mtd: Disable mtdchar mmap on MMU systems

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>

1 files changed, 5 insertions, 1 deletions

diff --git a/drivers/mtd/mtdchar.c b/drivers/mtd/mtdchar.c
index 73ae81a629f2..82c06165d3d2 100644
--- a/drivers/mtd/mtdchar.c
+++ b/drivers/mtd/mtdchar.c
@@ -1162,7 +1162,11 @@ static int mtdchar_mmap(struct file *file, struct vm_area_struct *vma)
         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);