ath9k: Setup appropriate tx desc for regular dma and edma

Signed-off-by: Vasanthakumar Thiagarajan <vasanth@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 16 insertions, 10 deletions

diff --git a/drivers/net/wireless/ath/ath9k/init.c b/drivers/net/wireless/ath/ath9k/init.c
index 1956c611503e..58a87f7931df 100644
--- a/drivers/net/wireless/ath/ath9k/init.c
+++ b/drivers/net/wireless/ath/ath9k/init.c
@@ -233,31 +233,37 @@ static int ath9k_reg_notifier(struct wiphy *wiphy,
 */
 int ath_descdma_setup(struct ath_softc *sc, struct ath_descdma *dd,
                       struct list_head *head, const char *name,
-                      int nbuf, int ndesc)
+                      int nbuf, int ndesc, bool is_tx)
 {
 #define DS2PHYS(_dd, _ds)                                               \
         ((_dd)->dd_desc_paddr + ((caddr_t)(_ds) - (caddr_t)(_dd)->dd_desc))
 #define ATH_DESC_4KB_BOUND_CHECK(_daddr) ((((_daddr) & 0xFFF) > 0xF7F) ? 1 : 0)
 #define ATH_DESC_4KB_BOUND_NUM_SKIPPED(_len) ((_len) / 4096)
         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
-        struct ath_desc *ds;
+        u8 *ds;
         struct ath_buf *bf;
-        int i, bsize, error;
+        int i, bsize, error, desc_len;
 
         ath_print(common, ATH_DBG_CONFIG, "%s DMA: %u buffers %u desc/buf\n",
                   name, nbuf, ndesc);
 
         INIT_LIST_HEAD(head);
+
+        if (is_tx)
+                desc_len = sc->sc_ah->caps.tx_desc_len;
+        else
+                desc_len = sizeof(struct ath_desc);
+
         /* ath_desc must be a multiple of DWORDs */
-        if ((sizeof(struct ath_desc) % 4) != 0) {
+        if ((desc_len % 4) != 0) {
                 ath_print(common, ATH_DBG_FATAL,
                           "ath_desc not DWORD aligned\n");
-                BUG_ON((sizeof(struct ath_desc) % 4) != 0);
+                BUG_ON((desc_len % 4) != 0);
                 error = -ENOMEM;
                 goto fail;
         }
 
-        dd->dd_desc_len = sizeof(struct ath_desc) * nbuf * ndesc;
+        dd->dd_desc_len = desc_len * nbuf * ndesc;
 
         /*
          * Need additional DMA memory because we can't use
@@ -270,7 +276,7 @@ int ath_descdma_setup(struct ath_softc *sc, struct ath_descdma *dd,
                 u32 dma_len;
 
                 while (ndesc_skipped) {
-                        dma_len = ndesc_skipped * sizeof(struct ath_desc);
+                        dma_len = ndesc_skipped * desc_len;
                         dd->dd_desc_len += dma_len;
 
                         ndesc_skipped = ATH_DESC_4KB_BOUND_NUM_SKIPPED(dma_len);
@@ -284,7 +290,7 @@ int ath_descdma_setup(struct ath_softc *sc, struct ath_descdma *dd,
                 error = -ENOMEM;
                 goto fail;
         }
-        ds = dd->dd_desc;
+        ds = (u8 *) dd->dd_desc;
         ath_print(common, ATH_DBG_CONFIG, "%s DMA map: %p (%u) -> %llx (%u)\n",
                   name, ds, (u32) dd->dd_desc_len,
                   ito64(dd->dd_desc_paddr), /*XXX*/(u32) dd->dd_desc_len);
@@ -298,7 +304,7 @@ int ath_descdma_setup(struct ath_softc *sc, struct ath_descdma *dd,
         }
         dd->dd_bufptr = bf;
 
-        for (i = 0; i < nbuf; i++, bf++, ds += ndesc) {
+        for (i = 0; i < nbuf; i++, bf++, ds += (desc_len * ndesc)) {
                 bf->bf_desc = ds;
                 bf->bf_daddr = DS2PHYS(dd, ds);
 
@@ -314,7 +320,7 @@ int ath_descdma_setup(struct ath_softc *sc, struct ath_descdma *dd,
                                        ((caddr_t) dd->dd_desc +
                                         dd->dd_desc_len));
 
-                                ds += ndesc;
+                                ds += (desc_len * ndesc);
                                 bf->bf_desc = ds;
                                 bf->bf_daddr = DS2PHYS(dd, ds);
                         }