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authorWu, Josh <Josh.wu@atmel.com>2013-07-24 17:55:30 +0800
committerTom Rini <trini@ti.com>2013-09-06 13:09:07 -0400
commit6b8f185faf29db302a20f584cc54253667535f08 (patch)
tree6e8a65e683845756d20603f2bfd66c7f2de80a3b /fs/fat/fat_write.c
parent7ea50d52849fe8ffa5b5b74c979b60b1045d6fc9 (diff)
downloadtalos-obmc-uboot-6b8f185faf29db302a20f584cc54253667535f08.tar.gz
talos-obmc-uboot-6b8f185faf29db302a20f584cc54253667535f08.zip
fs: fat: don't call disk_write with zero sector num
In the set_cluster() function, it will convert the buffer size to sector numbers. Then call disk_write() to write by sector. For remaining buffer, the size is less than a sector, call disk_write() again to write them in one sector. But if the total buffer size is less then one sector, the original code will call disk_write() with zero sector number. It is unnecessary. So this patch fix this. Now it will not call disk_write() if total buffer size is less than one sector. Signed-off-by: Josh Wu <josh.wu@atmel.com>
Diffstat (limited to 'fs/fat/fat_write.c')
-rw-r--r--fs/fat/fat_write.c8
1 files changed, 5 insertions, 3 deletions
diff --git a/fs/fat/fat_write.c b/fs/fat/fat_write.c
index b78026a81f..b7a21e05bf 100644
--- a/fs/fat/fat_write.c
+++ b/fs/fat/fat_write.c
@@ -552,9 +552,11 @@ set_cluster(fsdata *mydata, __u32 clustnum, __u8 *buffer,
debug("clustnum: %d, startsect: %d\n", clustnum, startsect);
- if (disk_write(startsect, size / mydata->sect_size, buffer) < 0) {
- debug("Error writing data\n");
- return -1;
+ if ((size / mydata->sect_size) > 0) {
+ if (disk_write(startsect, size / mydata->sect_size, buffer) < 0) {
+ debug("Error writing data\n");
+ return -1;
+ }
}
if (size % mydata->sect_size) {
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