Merge branch 'rmobile' of git://git.denx.de/u-boot-sh

[oweals/u-boot.git] / fs / fat / fat_write.c

diff --git a/fs/fat/fat_write.c b/fs/fat/fat_write.c
index 88dd4959ccde28f0e541dfc31f5fb924988685c1..adb6940dffcc3f6f63843b4a5d70af3d4e66f991 100644 (file)
--- a/fs/fat/fat_write.c
+++ b/fs/fat/fat_write.c
@@ -13,6 +13,8 @@
 #include <asm/byteorder.h>
 #include <part.h>
 #include <linux/ctype.h>
+#include <div64.h>
+#include <linux/math64.h>
 #include "fat.c"
 
 static void uppercase(char *str, int len)
@@ -28,6 +30,8 @@ static void uppercase(char *str, int len)
 static int total_sector;
 static int disk_write(__u32 block, __u32 nr_blocks, void *buf)
 {
+       ulong ret;
+
        if (!cur_dev || !cur_dev->block_write)
                return -1;
 
@@ -37,8 +41,13 @@ static int disk_write(__u32 block, __u32 nr_blocks, void *buf)
                return -1;
        }
 
-       return cur_dev->block_write(cur_dev->dev,
-                       cur_part_info.start + block, nr_blocks, buf);
+       ret = cur_dev->block_write(cur_dev->dev,
+                                  cur_part_info.start + block,
+                                  nr_blocks, buf);
+       if (nr_blocks && ret == 0)
+               return -1;
+
+       return ret;
 }
 
 /*
@@ -770,7 +779,7 @@ static void fill_dentry(fsdata *mydata, dir_entry *dentptr,
  */
 static int check_overflow(fsdata *mydata, __u32 clustnum, loff_t size)
 {
-       __u32 startsect, sect_num;
+       __u32 startsect, sect_num, offset;
 
        if (clustnum > 0) {
                startsect = mydata->data_begin +
@@ -779,13 +788,13 @@ static int check_overflow(fsdata *mydata, __u32 clustnum, loff_t size)
                startsect = mydata->rootdir_sect;
        }
 
-       sect_num = size / mydata->sect_size;
-       if (size % mydata->sect_size)
+       sect_num = div_u64_rem(size, mydata->sect_size, &offset);
+
+       if (offset != 0)
                sect_num++;
 
        if (startsect + sect_num > cur_part_info.start + total_sector)
                return -1;
-
        return 0;
 }