1 files changed, 15 insertions, 1 deletions

diff --git a/drivers/mtd/mtdcore.c b/drivers/mtd/mtdcore.c
index a9d24694982..76fe0a1e7a5 100644
--- a/drivers/mtd/mtdcore.c
+++ b/drivers/mtd/mtdcore.c
@@ -57,6 +57,19 @@ int add_mtd_device(struct mtd_info *mtd)
                         mtd->index = i;
                         mtd->usecount = 0;
 
+                        if (is_power_of_2(mtd->erasesize))
+                                mtd->erasesize_shift = ffs(mtd->erasesize) - 1;
+                        else
+                                mtd->erasesize_shift = 0;
+
+                        if (is_power_of_2(mtd->writesize))
+                                mtd->writesize_shift = ffs(mtd->writesize) - 1;
+                        else
+                                mtd->writesize_shift = 0;
+
+                        mtd->erasesize_mask = (1 << mtd->erasesize_shift) - 1;
+                        mtd->writesize_mask = (1 << mtd->writesize_shift) - 1;
+
                         /* Some chips always power up locked. Unlock them now */
                         if ((mtd->flags & MTD_WRITEABLE)
                             && (mtd->flags & MTD_POWERUP_LOCK) && mtd->unlock) {
@@ -344,7 +357,8 @@ static inline int mtd_proc_info (char *buf, int i)
         if (!this)
                 return 0;
 
-        return sprintf(buf, "mtd%d: %8.8x %8.8x \"%s\"\n", i, this->size,
+        return sprintf(buf, "mtd%d: %8.8llx %8.8x \"%s\"\n", i,
+                       (unsigned long long)this->size,
                        this->erasesize, this->name);
 }