1 files changed, 19 insertions, 11 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-rx.c b/drivers/net/wireless/iwlwifi/iwl-rx.c
index 38b2946b1d81..7cde9d76ff5d 100644
--- a/drivers/net/wireless/iwlwifi/iwl-rx.c
+++ b/drivers/net/wireless/iwlwifi/iwl-rx.c
@@ -376,7 +376,9 @@ int iwl_rx_init(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
 {
         int ret;
         unsigned long flags;
-        unsigned int rb_size;
+        u32 rb_size;
+        const u32 rfdnlog = RX_QUEUE_SIZE_LOG; /* 256 RBDs */
+        const u32 rb_timeout = 0; /* FIXME: RX_RB_TIMEOUT why this stalls RX */
 
         spin_lock_irqsave(&priv->lock, flags);
         ret = iwl_grab_nic_access(priv);
@@ -398,26 +400,32 @@ int iwl_rx_init(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
 
         /* Tell device where to find RBD circular buffer in DRAM */
         iwl_write_direct32(priv, FH_RSCSR_CHNL0_RBDCB_BASE_REG,
-                           rxq->dma_addr >> 8);
+                           (u32)(rxq->dma_addr >> 8));
 
         /* Tell device where in DRAM to update its Rx status */
         iwl_write_direct32(priv, FH_RSCSR_CHNL0_STTS_WPTR_REG,
                            (priv->shared_phys + priv->rb_closed_offset) >> 4);
 
-        /* Enable Rx DMA, enable host interrupt, Rx buffer size 4k, 256 RBDs */
+        /* Enable Rx DMA
+         * FH_RCSR_CHNL0_RX_IGNORE_RXF_EMPTY is set becuase of HW bug in
+         *      the credit mechanism in 5000 HW RX FIFO
+         * Direct rx interrupts to hosts
+         * Rx buffer size 4 or 8k
+         * RB timeout 0x10
+         * 256 RBDs
+         */
         iwl_write_direct32(priv, FH_MEM_RCSR_CHNL0_CONFIG_REG,
                            FH_RCSR_RX_CONFIG_CHNL_EN_ENABLE_VAL |
+                           FH_RCSR_CHNL0_RX_IGNORE_RXF_EMPTY |
                            FH_RCSR_CHNL0_RX_CONFIG_IRQ_DEST_INT_HOST_VAL |
-                           rb_size |
-                             /* 0x10 << 4 | */
-                           (RX_QUEUE_SIZE_LOG <<
-                              FH_RCSR_RX_CONFIG_RBDCB_SIZE_BITSHIFT));
-
-        /*
-         * iwl_write32(priv,CSR_INT_COAL_REG,0);
-         */
+                           rb_size|
+                           (rb_timeout << FH_RCSR_RX_CONFIG_REG_IRQ_RBTH_POS)|
+                           (rfdnlog << FH_RCSR_RX_CONFIG_RBDCB_SIZE_POS));
 
         iwl_release_nic_access(priv);
+
+        iwl_write32(priv, CSR_INT_COALESCING, 0x40);
+
         spin_unlock_irqrestore(&priv->lock, flags);
 
         return 0;