diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl3945-base.c | 32 |
1 files changed, 25 insertions, 7 deletions
diff --git a/drivers/net/wireless/iwlwifi/iwl3945-base.c b/drivers/net/wireless/iwlwifi/iwl3945-base.c index 745eaaec595..92fa1a39c44 100644 --- a/drivers/net/wireless/iwlwifi/iwl3945-base.c +++ b/drivers/net/wireless/iwlwifi/iwl3945-base.c @@ -1176,7 +1176,7 @@ static int iwl3945_rx_queue_restock(struct iwl_priv *priv) /* If we've added more space for the firmware to place data, tell it. * Increment device's write pointer in multiples of 8. */ - if ((write != (rxq->write & ~0x7)) + if ((rxq->write_actual != (rxq->write & ~0x7)) || (abs(rxq->write - rxq->read) > 7)) { spin_lock_irqsave(&rxq->lock, flags); rxq->need_update = 1; @@ -1197,7 +1197,7 @@ static int iwl3945_rx_queue_restock(struct iwl_priv *priv) * Also restock the Rx queue via iwl3945_rx_queue_restock. * This is called as a scheduled work item (except for during initialization) */ -static void iwl3945_rx_allocate(struct iwl_priv *priv) +static void iwl3945_rx_allocate(struct iwl_priv *priv, gfp_t priority) { struct iwl_rx_queue *rxq = &priv->rxq; struct list_head *element; @@ -1220,7 +1220,7 @@ static void iwl3945_rx_allocate(struct iwl_priv *priv) /* Alloc a new receive buffer */ rxb->skb = alloc_skb(priv->hw_params.rx_buf_size, - GFP_KERNEL); + priority); if (!rxb->skb) { if (net_ratelimit()) IWL_CRIT(priv, ": Can not allocate SKB buffers\n"); @@ -1279,6 +1279,7 @@ void iwl3945_rx_queue_reset(struct iwl_priv *priv, struct iwl_rx_queue *rxq) * not restocked the Rx queue with fresh buffers */ rxq->read = rxq->write = 0; rxq->free_count = 0; + rxq->write_actual = 0; spin_unlock_irqrestore(&rxq->lock, flags); } @@ -1287,13 +1288,21 @@ void iwl3945_rx_replenish(void *data) struct iwl_priv *priv = data; unsigned long flags; - iwl3945_rx_allocate(priv); + iwl3945_rx_allocate(priv, GFP_KERNEL); spin_lock_irqsave(&priv->lock, flags); iwl3945_rx_queue_restock(priv); spin_unlock_irqrestore(&priv->lock, flags); } +static void iwl3945_rx_replenish_now(struct iwl_priv *priv) +{ + iwl3945_rx_allocate(priv, GFP_ATOMIC); + + iwl3945_rx_queue_restock(priv); +} + + /* Assumes that the skb field of the buffers in 'pool' is kept accurate. * If an SKB has been detached, the POOL needs to have its SKB set to NULL * This free routine walks the list of POOL entries and if SKB is set to @@ -1416,13 +1425,19 @@ static void iwl3945_rx_handle(struct iwl_priv *priv) unsigned long flags; u8 fill_rx = 0; u32 count = 8; + int total_empty = 0; /* uCode's read index (stored in shared DRAM) indicates the last Rx * buffer that the driver may process (last buffer filled by ucode). */ r = le16_to_cpu(rxq->rb_stts->closed_rb_num) & 0x0FFF; i = rxq->read; - if (iwl_rx_queue_space(rxq) > (RX_QUEUE_SIZE / 2)) + /* calculate total frames need to be restock after handling RX */ + total_empty = r - priv->rxq.write_actual; + if (total_empty < 0) + total_empty += RX_QUEUE_SIZE; + + if (total_empty > (RX_QUEUE_SIZE / 2)) fill_rx = 1; /* Rx interrupt, but nothing sent from uCode */ if (i == r) @@ -1499,7 +1514,7 @@ static void iwl3945_rx_handle(struct iwl_priv *priv) count++; if (count >= 8) { priv->rxq.read = i; - iwl3945_rx_queue_restock(priv); + iwl3945_rx_replenish_now(priv); count = 0; } } @@ -1507,7 +1522,10 @@ static void iwl3945_rx_handle(struct iwl_priv *priv) /* Backtrack one entry */ priv->rxq.read = i; - iwl3945_rx_queue_restock(priv); + if (fill_rx) + iwl3945_rx_replenish_now(priv); + else + iwl3945_rx_queue_restock(priv); } /* call this function to flush any scheduled tasklet */ |