It is more efficient not to write the status ring from the
processor and just read the active portion.
Signed-off-by: Stephen Hemminger <[EMAIL PROTECTED]>
--- sky2.orig/drivers/net/sky2.c 2006-05-02 09:49:38.000000000 -0700
+++ sky2/drivers/net/sky2.c 2006-05-02 09:49:42.000000000 -0700
@@ -1865,35 +1865,28 @@
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 @@
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;
}
}
--
-
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