rt2x00: Properly request tx headroom for alignment operations.

[linux-beck.git] / drivers / net / wireless / rt2x00 / rt2x00dev.c

diff --git a/drivers/net/wireless/rt2x00/rt2x00dev.c b/drivers/net/wireless/rt2x00/rt2x00dev.c
index 06c43ca39bf8549470331707fb432e807679c0e6..265e66dba552c2e3d0188b6baad46c0a32a4d6fb 100644 (file)
--- a/drivers/net/wireless/rt2x00/rt2x00dev.c
+++ b/drivers/net/wireless/rt2x00/rt2x00dev.c
@@ -686,7 +686,17 @@ static int rt2x00lib_probe_hw(struct rt2x00_dev *rt2x00dev)
        /*
         * Initialize extra TX headroom required.
         */
-       rt2x00dev->hw->extra_tx_headroom = rt2x00dev->ops->extra_tx_headroom;
+       rt2x00dev->hw->extra_tx_headroom =
+               max_t(unsigned int, IEEE80211_TX_STATUS_HEADROOM,
+                     rt2x00dev->ops->extra_tx_headroom);
+
+       /*
+        * Take TX headroom required for alignment into account.
+        */
+       if (test_bit(DRIVER_REQUIRE_L2PAD, &rt2x00dev->flags))
+               rt2x00dev->hw->extra_tx_headroom += RT2X00_L2PAD_SIZE;
+       else if (test_bit(DRIVER_REQUIRE_DMA, &rt2x00dev->flags))
+               rt2x00dev->hw->extra_tx_headroom += RT2X00_ALIGN_SIZE;
 
        /*
         * Register HW.