1 files changed, 4 insertions, 3 deletions

diff --git a/drivers/mtd/ssfdc.c b/drivers/mtd/ssfdc.c
index 33a5d6ed6f18..3f67e00d98e0 100644
--- a/drivers/mtd/ssfdc.c
+++ b/drivers/mtd/ssfdc.c
@@ -294,7 +294,8 @@ static void ssfdcr_add_mtd(struct mtd_blktrans_ops *tr, struct mtd_info *mtd)
         int cis_sector;
 
         /* Check for small page NAND flash */
-        if (mtd->type != MTD_NANDFLASH || mtd->oobsize != OOB_SIZE)
+        if (mtd->type != MTD_NANDFLASH || mtd->oobsize != OOB_SIZE ||
+            mtd->size > UINT_MAX)
                 return;
 
         /* Check for SSDFC format by reading CIS/IDI sector */
@@ -316,7 +317,7 @@ static void ssfdcr_add_mtd(struct mtd_blktrans_ops *tr, struct mtd_info *mtd)
 
         ssfdc->cis_block = cis_sector / (mtd->erasesize >> SECTOR_SHIFT);
         ssfdc->erase_size = mtd->erasesize;
-        ssfdc->map_len = mtd->size / mtd->erasesize;
+        ssfdc->map_len = (u32)mtd->size / mtd->erasesize;
 
         DEBUG(MTD_DEBUG_LEVEL1,
                 "SSFDC_RO: cis_block=%d,erase_size=%d,map_len=%d,n_zones=%d\n",
@@ -327,7 +328,7 @@ static void ssfdcr_add_mtd(struct mtd_blktrans_ops *tr, struct mtd_info *mtd)
         ssfdc->heads = 16;
         ssfdc->sectors = 32;
         get_chs(mtd->size, NULL, &ssfdc->heads, &ssfdc->sectors);
-        ssfdc->cylinders = (unsigned short)((mtd->size >> SECTOR_SHIFT) /
+        ssfdc->cylinders = (unsigned short)(((u32)mtd->size >> SECTOR_SHIFT) /
                         ((long)ssfdc->sectors * (long)ssfdc->heads));
 
         DEBUG(MTD_DEBUG_LEVEL1, "SSFDC_RO: using C:%d H:%d S:%d == %ld sects\n",