ath9k: Cleanup buffer status handling

Using a u32 to store a single flag is overkill.
Use a bool to store whether the buffer is stale or not.
Also, use u8 instead of u32 to store the buffer type.

Signed-off-by: Sujith <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/drivers/net/wireless/ath9k/ath9k.h b/drivers/net/wireless/ath9k/ath9k.h
index 9adc991..e6c39c1 100644 (file)
--- a/drivers/net/wireless/ath9k/ath9k.h
+++ b/drivers/net/wireless/ath9k/ath9k.h
@@ -74,13 +74,17 @@ struct ath_config {
 /*************************/
 
 #define ATH_TXBUF_RESET(_bf) do {                              \
-               (_bf)->bf_status = 0;                           \
+               (_bf)->bf_stale = false;                        \
                (_bf)->bf_lastbf = NULL;                        \
                (_bf)->bf_next = NULL;                          \
                memset(&((_bf)->bf_state), 0,                   \
                       sizeof(struct ath_buf_state));           \
        } while (0)
 
+#define ATH_RXBUF_RESET(_bf) do {              \
+               (_bf)->bf_stale = false;        \
+       } while (0)
+
 /**
  * enum buffer_type - Buffer type flags
  *
@@ -106,7 +110,7 @@ struct ath_buf_state {
        int bfs_seqno;
        int bfs_tidno;
        int bfs_retries;
-       u32 bf_type;
+       u8 bf_type;
        u32 bfs_keyix;
        enum ath9k_key_type bfs_keytype;
 };
@@ -134,15 +138,12 @@ struct ath_buf {
        struct ath_desc *bf_desc;       /* virtual addr of desc */
        dma_addr_t bf_daddr;            /* physical addr of desc */
        dma_addr_t bf_buf_addr;         /* physical addr of data buffer */
-       u32 bf_status;
+       bool bf_stale;
        u16 bf_flags;
        struct ath_buf_state bf_state;
        dma_addr_t bf_dmacontext;
 };
 
-#define ATH_RXBUF_RESET(_bf)    ((_bf)->bf_status = 0)
-#define ATH_BUFSTATUS_STALE     0x00000002
-
 struct ath_descdma {
        const char *dd_name;
        struct ath_desc *dd_desc;

diff --git a/drivers/net/wireless/ath9k/xmit.c b/drivers/net/wireless/ath9k/xmit.c
index 87bbeaa..735256f 100644 (file)
--- a/drivers/net/wireless/ath9k/xmit.c
+++ b/drivers/net/wireless/ath9k/xmit.c
@@ -380,8 +380,7 @@ static void ath_tx_complete_aggr(struct ath_softc *sc, struct ath_txq *txq,
                        ath_tx_complete_buf(sc, bf, &bf_head, !txfail, sendbar);
                } else {
                        /* retry the un-acked ones */
-                       if (bf->bf_next == NULL &&
-                           bf_last->bf_status & ATH_BUFSTATUS_STALE) {
+                       if (bf->bf_next == NULL && bf_last->bf_stale) {
                                struct ath_buf *tbf;
 
                                tbf = ath_clone_txbuf(sc, bf_last);
@@ -1004,7 +1003,7 @@ void ath_draintxq(struct ath_softc *sc, struct ath_txq *txq, bool retry_tx)
 
                bf = list_first_entry(&txq->axq_q, struct ath_buf, list);
 
-               if (bf->bf_status & ATH_BUFSTATUS_STALE) {
+               if (bf->bf_stale) {
                        list_del(&bf->list);
                        spin_unlock_bh(&txq->axq_lock);
 
@@ -1941,7 +1940,7 @@ static void ath_tx_processq(struct ath_softc *sc, struct ath_txq *txq)
                 * it with the STALE flag.
                 */
                bf_held = NULL;
-               if (bf->bf_status & ATH_BUFSTATUS_STALE) {
+               if (bf->bf_stale) {
                        bf_held = bf;
                        if (list_is_last(&bf_held->list, &txq->axq_q)) {
                                txq->axq_link = NULL;
@@ -1982,7 +1981,7 @@ static void ath_tx_processq(struct ath_softc *sc, struct ath_txq *txq)
                 * however leave the last descriptor back as the holding
                 * descriptor for hw.
                 */
-               lastbf->bf_status |= ATH_BUFSTATUS_STALE;
+               lastbf->bf_stale = true;
                INIT_LIST_HEAD(&bf_head);
                if (!list_is_singular(&lastbf->list))
                        list_cut_position(&bf_head,