diff options
| -rw-r--r-- | fs/fat/fat.c | 23 |
1 files changed, 10 insertions, 13 deletions
diff --git a/fs/fat/fat.c b/fs/fat/fat.c index 7021138b98..65f77c4f75 100644 --- a/fs/fat/fat.c +++ b/fs/fat/fat.c @@ -275,22 +275,19 @@ get_cluster(fsdata *mydata, __u32 clustnum, __u8 *buffer, unsigned long size) buffer += mydata->sect_size; size -= mydata->sect_size; } - } else { - __u32 idx; - - idx = size / mydata->sect_size; - if (idx == 0) - ret = 0; - else - ret = disk_read(startsect, idx, buffer); - if (ret != idx) { + } else if (size >= mydata->sect_size) { + __u32 bytes_read; + __u32 sect_count = size / mydata->sect_size; + + ret = disk_read(startsect, sect_count, buffer); + if (ret != sect_count) { debug("Error reading data (got %d)\n", ret); return -1; } - startsect += idx; - idx *= mydata->sect_size; - buffer += idx; - size -= idx; + bytes_read = sect_count * mydata->sect_size; + startsect += sect_count; + buffer += bytes_read; + size -= bytes_read; } if (size) { ALLOC_CACHE_ALIGN_BUFFER(__u8, tmpbuf, mydata->sect_size); |