diff --git a/components/drivers/sdio/block_dev.c b/components/drivers/sdio/block_dev.c
index 581eb357984e0a901ea0e4afafb18fbe4f5e1f8d..104ac3e075618e14b96bd15fbffea557c750dbd8 100644
--- a/components/drivers/sdio/block_dev.c
+++ b/components/drivers/sdio/block_dev.c
@@ -227,6 +227,8 @@ static rt_err_t rt_mmcsd_control(rt_device_t dev, int cmd, void *args)
     case RT_DEVICE_CTRL_BLK_GETGEOME:
         rt_memcpy(args, &blk_dev->geometry, sizeof(struct rt_device_blk_geometry));
         break;
+    case RT_DEVICE_CTRL_BLK_PARTITION:
+        rt_memcpy(args, &blk_dev->part, sizeof(struct dfs_partition));
     default:
         break;
     }
@@ -256,7 +258,7 @@ static rt_size_t rt_mmcsd_read(rt_device_t dev,
     while (remain_size)
     {
         req_size = (remain_size > blk_dev->max_req_size) ? blk_dev->max_req_size : remain_size;
-        err = rt_mmcsd_req_blk(blk_dev->card, part->offset + pos + offset, rd_ptr, req_size, 0);
+        err = rt_mmcsd_req_blk(blk_dev->card, pos + offset, rd_ptr, req_size, 0);
         if (err)
             break;
         offset += req_size;
@@ -297,7 +299,7 @@ static rt_size_t rt_mmcsd_write(rt_device_t dev,
     while (remain_size)
     {
         req_size = (remain_size > blk_dev->max_req_size) ? blk_dev->max_req_size : remain_size;
-        err = rt_mmcsd_req_blk(blk_dev->card, part->offset + pos + offset, wr_ptr, req_size, 1);
+        err = rt_mmcsd_req_blk(blk_dev->card, pos + offset, wr_ptr, req_size, 1);
         if (err)
             break;
         offset += req_size;
diff --git a/include/rtdef.h b/include/rtdef.h
index 8d0e954c34d610b803a53f794adccf6b25121707..9bbf986bc85fb4354f43353bcda694dc015c8474 100644
--- a/include/rtdef.h
+++ b/include/rtdef.h
@@ -1055,6 +1055,7 @@ enum rt_device_class_type
 #define RT_DEVICE_CTRL_BLK_SYNC         0x41            /**< flush data to block device */
 #define RT_DEVICE_CTRL_BLK_ERASE        0x42            /**< erase block on block device */
 #define RT_DEVICE_CTRL_BLK_AUTOREFRESH  0x43            /**< block device : enter/exit auto refresh mode */
+#define RT_DEVICE_CTRL_BLK_PARTITION    0X44            /**< get block device partition */
 /* net interface device*/
 #define RT_DEVICE_CTRL_NETIF_GETMAC     0x40            /**< get mac address */