From e71ebd73276cc21efc74aba4118ef037cd32e50a Mon Sep 17 00:00:00 2001 From: Stephen Hemminger Date: Mon, 8 May 2006 15:11:31 -0700 Subject: [PATCH] sky2: dont write status ring It is more efficient not to write the status ring from the processor and just read the active portion. Signed-off-by: Stephen Hemminger --- drivers/net/sky2.c | 21 +++++++-------------- 1 file changed, 7 insertions(+), 14 deletions(-) diff --git a/drivers/net/sky2.c b/drivers/net/sky2.c index 940ed699a7..ea23da5367 100644 --- a/drivers/net/sky2.c +++ b/drivers/net/sky2.c @@ -1865,35 +1865,28 @@ static inline void sky2_tx_done(struct net_device *dev, u16 last) static int sky2_status_intr(struct sky2_hw *hw, int to_do) { int work_done = 0; + u16 hwidx = sky2_read16(hw, STAT_PUT_IDX); rmb(); - for(;;) { + while (hw->st_idx != hwidx) { struct sky2_status_le *le = hw->st_le + hw->st_idx; struct net_device *dev; struct sky2_port *sky2; struct sk_buff *skb; u32 status; u16 length; - u8 link, opcode; - - opcode = le->opcode; - if (!opcode) - break; - opcode &= ~HW_OWNER; hw->st_idx = RING_NEXT(hw->st_idx, STATUS_RING_SIZE); - le->opcode = 0; - link = le->link; - BUG_ON(link >= 2); - dev = hw->dev[link]; + BUG_ON(le->link >= 2); + dev = hw->dev[le->link]; sky2 = netdev_priv(dev); length = le->length; status = le->status; - switch (opcode) { + switch (le->opcode & ~HW_OWNER) { case OP_RXSTAT: skb = sky2_receive(sky2, length, status); if (!skb) @@ -1944,8 +1937,8 @@ static int sky2_status_intr(struct sky2_hw *hw, int to_do) default: if (net_ratelimit()) printk(KERN_WARNING PFX - "unknown status opcode 0x%x\n", opcode); - break; + "unknown status opcode 0x%x\n", le->opcode); + goto exit_loop; } } -- 2.39.5