wl12xx: Clean up the block size alignment code

Simplify and clean up the block size alignment code:
1. Set the block size according to the padding field type, as it cannot
   exceed the maximum value this field can hold.
2. Move the alignment code into a function instead of duplicating it in
   multiple places.
3. In the current implementation, the block_size member can be
   misleading because a zero value actually means that there's no need to
   align. Declare a block size alignment quirk instead.

Signed-off-by: Ido Yariv <ido@wizery.com>
Signed-off-by: Luciano Coelho <coelho@ti.com>

1 files changed, 14 insertions, 12 deletions

diff --git a/drivers/net/wireless/wl12xx/tx.c b/drivers/net/wireless/wl12xx/tx.c
index 7686bc1ff16a..ba69ba7051fa 100644
--- a/drivers/net/wireless/wl12xx/tx.c
+++ b/drivers/net/wireless/wl12xx/tx.c
@@ -149,6 +149,15 @@ u8 wl1271_tx_get_hlid(struct sk_buff *skb)
         }
 }
 
+static unsigned int wl12xx_calc_packet_alignment(struct wl1271 *wl,
+                                                unsigned int packet_length)
+{
+        if (wl->quirks & WL12XX_QUIRK_BLOCKSIZE_ALIGNMENT)
+                return ALIGN(packet_length, WL12XX_BUS_BLOCK_SIZE);
+        else
+                return ALIGN(packet_length, WL1271_TX_ALIGN_TO);
+}
+
 static int wl1271_tx_allocate(struct wl1271 *wl, struct sk_buff *skb, u32 extra,
                                 u32 buf_offset, u8 hlid)
 {
@@ -174,10 +183,7 @@ 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 */
-        if (wl->block_size)
-                len = ALIGN(total_len, wl->block_size);
-        else
-                len = total_len;
+        len = wl12xx_calc_packet_alignment(wl, total_len);
 
         total_blocks = (len + TX_HW_BLOCK_SIZE - 1) / TX_HW_BLOCK_SIZE +
                 spare_blocks;
@@ -291,9 +297,9 @@ static void wl1271_tx_fill_hdr(struct wl1271 *wl, struct sk_buff *skb,
         tx_attr |= rate_idx << TX_HW_ATTR_OFST_RATE_POLICY;
         desc->reserved = 0;
 
-        if (wl->block_size) {
-                aligned_len = ALIGN(skb->len, wl->block_size);
+        aligned_len = wl12xx_calc_packet_alignment(wl, skb->len);
 
+        if (wl->chip.id == CHIP_ID_1283_PG20) {
                 desc->wl128x_mem.extra_bytes = aligned_len - skb->len;
                 desc->length = cpu_to_le16(aligned_len >> 2);
 
@@ -306,8 +312,7 @@ static void wl1271_tx_fill_hdr(struct wl1271 *wl, struct sk_buff *skb,
         } else {
                 int pad;
 
-                /* align the length (and store in terms of words) */
-                aligned_len = ALIGN(skb->len, WL1271_TX_ALIGN_TO);
+                /* Store the aligned length in terms of words */
                 desc->length = cpu_to_le16(aligned_len >> 2);
 
                 /* calculate number of padding bytes */
@@ -386,10 +391,7 @@ static int wl1271_prepare_tx_frame(struct wl1271 *wl, struct sk_buff *skb,
          * In special cases, we want to align to a specific block size
          * (eg. for wl128x with SDIO we align to 256).
          */
-        if (wl->block_size)
-                total_len = ALIGN(skb->len, wl->block_size);
-        else
-                total_len = ALIGN(skb->len, WL1271_TX_ALIGN_TO);
+        total_len = wl12xx_calc_packet_alignment(wl, skb->len);
 
         memcpy(wl->aggr_buf + buf_offset, skb->data, skb->len);
         memset(wl->aggr_buf + buf_offset + skb->len, 0, total_len - skb->len);