Kok, Auke wrote:
Simplify the msi interrupt handler to avoid issues with delayed ICR reads.
This avoids adapter specific problems at the cost of some performance.
Signed-off-by: Jesse Brandeburg <[EMAIL PROTECTED]>
Signed-off-by: Auke Kok <[EMAIL PROTECTED]>
---
drivers/net/e1000/e1000.h | 1 -
drivers/net/e1000/e1000_main.c | 60 +++++++++++++---------------------------
2 files changed, 19 insertions(+), 42 deletions(-)
diff --git a/drivers/net/e1000/e1000.h b/drivers/net/e1000/e1000.h
index f091042..8e7acb0 100644
--- a/drivers/net/e1000/e1000.h
+++ b/drivers/net/e1000/e1000.h
@@ -257,7 +257,6 @@ struct e1000_adapter {
spinlock_t tx_queue_lock;
#endif
atomic_t irq_sem;
- unsigned int detect_link;
unsigned int total_tx_bytes;
unsigned int total_tx_packets;
unsigned int total_rx_bytes;
diff --git a/drivers/net/e1000/e1000_main.c b/drivers/net/e1000/e1000_main.c
index 67fc379..cb6b732 100644
--- a/drivers/net/e1000/e1000_main.c
+++ b/drivers/net/e1000/e1000_main.c
@@ -3778,8 +3778,8 @@ e1000_update_stats(struct e1000_adapter
* @data: pointer to a network interface device structure
**/
-static
-irqreturn_t e1000_intr_msi(int irq, void *data)
+static irqreturn_t
+e1000_intr_msi(int irq, void *data)
{
struct net_device *netdev = data;
struct e1000_adapter *adapter = netdev_priv(netdev);
@@ -3787,49 +3787,27 @@ irqreturn_t e1000_intr_msi(int irq, void
#ifndef CONFIG_E1000_NAPI
int i;
#endif
+ uint32_t icr = E1000_READ_REG(hw, ICR);
- /* this code avoids the read of ICR but has to get 1000 interrupts
- * at every link change event before it will notice the change */
- if (++adapter->detect_link >= 1000) {
- uint32_t icr = E1000_READ_REG(hw, ICR);
#ifdef CONFIG_E1000_NAPI
- /* read ICR disables interrupts using IAM, so keep up with our
- * enable/disable accounting */
- atomic_inc(&adapter->irq_sem);
+ /* read ICR disables interrupts using IAM, so keep up with our
+ * enable/disable accounting */
+ atomic_inc(&adapter->irq_sem);
#endif
- adapter->detect_link = 0;
- if ((icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC)) &&
- (icr & E1000_ICR_INT_ASSERTED)) {
- hw->get_link_status = 1;
- /* 80003ES2LAN workaround--
- * For packet buffer work-around on link down event;
- * disable receives here in the ISR and
- * reset adapter in watchdog
- */
- if (netif_carrier_ok(netdev) &&
- (adapter->hw.mac_type == e1000_80003es2lan)) {
- /* disable receives */
- uint32_t rctl = E1000_READ_REG(hw, RCTL);
- E1000_WRITE_REG(hw, RCTL, rctl &
~E1000_RCTL_EN);
- }
- /* guard against interrupt when we're going down */
- if (!test_bit(__E1000_DOWN, &adapter->flags))
- mod_timer(&adapter->watchdog_timer,
- jiffies + 1);
+ if (icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC)) {
+ hw->get_link_status = 1;
+ /* 80003ES2LAN workaround-- For packet buffer work-around on
+ * link down event; disable receives here in the ISR and reset
+ * adapter in watchdog */
+ if (netif_carrier_ok(netdev) &&
+ (adapter->hw.mac_type == e1000_80003es2lan)) {
+ /* disable receives */
+ uint32_t rctl = E1000_READ_REG(hw, RCTL);
+ E1000_WRITE_REG(hw, RCTL, rctl & ~E1000_RCTL_EN);
feature flag
-
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to [EMAIL PROTECTED]
More majordomo info at http://vger.kernel.org/majordomo-info.html
