diff --git a/hw/sd/sdhci.c b/hw/sd/sdhci.c
index b897b11..ddf3691 100644
--- a/hw/sd/sdhci.c
+++ b/hw/sd/sdhci.c
@@ -496,8 +496,6 @@
 /* Write data from host controller FIFO to card */
 static void sdhci_write_block_to_card(SDHCIState *s)
 {
-    int index = 0;
-
     if (s->prnsts & SDHC_SPACE_AVAILABLE) {
         if (s->norintstsen & SDHC_NISEN_WBUFRDY) {
             s->norintsts |= SDHC_NIS_WBUFRDY;
@@ -514,9 +512,7 @@
         }
     }
 
-    for (index = 0; index < (s->blksize & BLOCK_SIZE_MASK); index++) {
-        sdbus_write_byte(&s->sdbus, s->fifo_buffer[index]);
-    }
+    sdbus_write_data(&s->sdbus, s->fifo_buffer, s->blksize & BLOCK_SIZE_MASK);
 
     /* Next data can be written through BUFFER DATORT register */
     s->prnsts |= SDHC_SPACE_AVAILABLE;
@@ -641,9 +637,7 @@
                             &s->fifo_buffer[begin], s->data_count - begin);
             s->sdmasysad += s->data_count - begin;
             if (s->data_count == block_size) {
-                for (n = 0; n < block_size; n++) {
-                    sdbus_write_byte(&s->sdbus, s->fifo_buffer[n]);
-                }
+                sdbus_write_data(&s->sdbus, s->fifo_buffer, block_size);
                 s->data_count = 0;
                 if (s->trnmod & SDHC_TRNS_BLK_CNT_EN) {
                     s->blkcnt--;
@@ -678,9 +672,7 @@
         dma_memory_write(s->dma_as, s->sdmasysad, s->fifo_buffer, datacnt);
     } else {
         dma_memory_read(s->dma_as, s->sdmasysad, s->fifo_buffer, datacnt);
-        for (n = 0; n < datacnt; n++) {
-            sdbus_write_byte(&s->sdbus, s->fifo_buffer[n]);
-        }
+        sdbus_write_data(&s->sdbus, s->fifo_buffer, datacnt);
     }
     s->blkcnt--;
 
@@ -814,9 +806,7 @@
                                     s->data_count - begin);
                     dscr.addr += s->data_count - begin;
                     if (s->data_count == block_size) {
-                        for (n = 0; n < block_size; n++) {
-                            sdbus_write_byte(&s->sdbus, s->fifo_buffer[n]);
-                        }
+                        sdbus_write_data(&s->sdbus, s->fifo_buffer, block_size);
                         s->data_count = 0;
                         if (s->trnmod & SDHC_TRNS_BLK_CNT_EN) {
                             s->blkcnt--;