[U-Boot] [U-BOOT][PATCH 3/3] mflash : Improve mg_disk_read(write) sector count calculation

[unsik Kim]

Signed-off-by: unsik Kim <donar...@gmail.com>
---
  drivers/block/mg_disk.c |   16 ++++------------
  1 files changed, 4 insertions(+), 12 deletions(-)

diff --git a/drivers/block/mg_disk.c b/drivers/block/mg_disk.c
index 2eb461d..bbfeeda 100644
--- a/drivers/block/mg_disk.c
+++ b/drivers/block/mg_disk.c
@@ -382,12 +382,8 @@ unsigned int mg_disk_read (u32 addr, u8 *buff, u32 len)

        if (cur_addr < end_addr) {
                sect_num = cur_addr >> MG_SECTOR_SIZE_SHIFT;
-               next_sec_addr = cur_addr + MG_SECTOR_SIZE;
-
-               while (next_sec_addr <= end_addr) {
-                       cnt++;
-                       next_sec_addr += MG_SECTOR_SIZE;
-               }
+               cnt = ((end_addr & MG_SECTOR_SIZE_MASK) - cur_addr) >>
+                       MG_SECTOR_SIZE_SHIFT;

                if (cnt)
                        err = mg_disk_read_sects(buff_ptr, sect_num, cnt);
@@ -524,12 +520,8 @@ unsigned int mg_disk_write(u32 addr, u8 *buff, u32 len)
        if (cur_addr < end_addr) {

                sect_num = cur_addr >> MG_SECTOR_SIZE_SHIFT;
-               next_sec_addr = cur_addr + MG_SECTOR_SIZE;
-
-               while (next_sec_addr <= end_addr) {
-                       cnt++;
-                       next_sec_addr += MG_SECTOR_SIZE;
-               }
+               cnt = ((end_addr & MG_SECTOR_SIZE_MASK) - cur_addr) >>
+                       MG_SECTOR_SIZE_SHIFT;

                if (cnt)
                        err = mg_disk_write_sects(buff_ptr, sect_num, cnt);
-- 
1.5.6.6
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