diff --git a/drivers/net/wireless/wl12xx/wl1271_tx.c b/drivers/net/wireless/wl12xx/wl1271_tx.c
index a32d3014781d24bba9ff9bbfb93d4746e13f7e82..d3ed63e92cf4fa5fa7ce23d938eff996de64f67c 100644
--- a/drivers/net/wireless/wl12xx/wl1271_tx.c
+++ b/drivers/net/wireless/wl12xx/wl1271_tx.c
@@ -46,7 +46,7 @@ static int wl1271_tx_allocate(struct wl1271 *wl, struct sk_buff *skb, u32 extra)
{
struct wl1271_tx_hw_descr *desc;
u32 total_len = skb->len + sizeof(struct wl1271_tx_hw_descr) + extra;
- u32 total_blocks, excluded;
+ u32 total_blocks;
int id, ret = -EBUSY;
/* allocate free identifier for the packet */
@@ -56,12 +56,8 @@ static int wl1271_tx_allocate(struct wl1271 *wl, struct sk_buff *skb, u32 extra)
/* approximate the number of blocks required for this packet
in the firmware */
- /* FIXME: try to figure out what is done here and make it cleaner */
- total_blocks = (total_len + 20) >> TX_HW_BLOCK_SHIFT_DIV;
- excluded = (total_blocks << 2) + ((total_len + 20) & 0xff) + 34;
- total_blocks += (excluded > 252) ? 2 : 1;
- total_blocks += TX_HW_BLOCK_SPARE;
-
+ total_blocks = total_len + TX_HW_BLOCK_SIZE - 1;
+ total_blocks = total_blocks / TX_HW_BLOCK_SIZE + TX_HW_BLOCK_SPARE;
if (total_blocks <= wl->tx_blocks_available) {
desc = (struct wl1271_tx_hw_descr *)skb_push(
skb, total_len - skb->len);
diff --git a/drivers/net/wireless/wl12xx/wl1271_tx.h b/drivers/net/wireless/wl12xx/wl1271_tx.h
index ca92bd811292af1fe5c9542910fdf61f3ee997d7..8b9f6b4f5652c6d861345d7056e50185e5d64f44 100644
--- a/drivers/net/wireless/wl12xx/wl1271_tx.h
+++ b/drivers/net/wireless/wl12xx/wl1271_tx.h
@@ -26,7 +26,7 @@
#define __WL1271_TX_H__
#define TX_HW_BLOCK_SPARE 2
-#define TX_HW_BLOCK_SHIFT_DIV 8
+#define TX_HW_BLOCK_SIZE 252
#define TX_HW_MGMT_PKT_LIFETIME_TU 2000
/* The chipset reference driver states, that the "aid" value 1