Need to avoid race in updating IRQ mask. This can probably be replaced
smarter use of the interrupt control registers (if/when chipset
docs are available).
Signed-off-by: Stephen Hemminger <[EMAIL PROTECTED]>
--- sky2.orig/drivers/net/sky2.c 2006-02-22 11:33:41.000000000 -0800
+++ sky2/drivers/net/sky2.c 2006-02-22 11:33:45.000000000 -0800
@@ -1079,8 +1079,10 @@
goto err_out;
/* Enable interrupts from phy/mac for port */
+ spin_lock_irq(&hw->hw_lock);
hw->intr_mask |= (port == 0) ? Y2_IS_PORT_1 : Y2_IS_PORT_2;
sky2_write32(hw, B0_IMSK, hw->intr_mask);
+ spin_unlock_irq(&hw->hw_lock);
return 0;
err_out:
@@ -1380,10 +1382,10 @@
netif_stop_queue(dev);
/* Disable port IRQ */
- local_irq_disable();
+ spin_lock_irq(&hw->hw_lock);
hw->intr_mask &= ~((sky2->port == 0) ? Y2_IS_IRQ_PHY1 : Y2_IS_IRQ_PHY2);
sky2_write32(hw, B0_IMSK, hw->intr_mask);
- local_irq_enable();
+ spin_unlock_irq(&hw->hw_lock);
flush_scheduled_work();
@@ -1665,10 +1667,10 @@
out:
up(&sky2->phy_sema);
- local_irq_disable();
+ spin_lock_irq(&hw->hw_lock);
hw->intr_mask |= (sky2->port == 0) ? Y2_IS_IRQ_PHY1 : Y2_IS_IRQ_PHY2;
sky2_write32(hw, B0_IMSK, hw->intr_mask);
- local_irq_enable();
+ spin_unlock_irq(&hw->hw_lock);
}
@@ -1994,9 +1996,13 @@
}
if (likely(work_done < to_do)) {
- netif_rx_complete(dev0);
+ spin_lock_irq(&hw->hw_lock);
+ __netif_rx_complete(dev0);
+
hw->intr_mask |= Y2_IS_STAT_BMU;
sky2_write32(hw, B0_IMSK, hw->intr_mask);
+ spin_unlock_irq(&hw->hw_lock);
+
return 0;
} else {
*budget -= work_done;
@@ -2128,6 +2134,7 @@
hw->intr_mask &= ~(port == 0 ? Y2_IS_IRQ_PHY1 : Y2_IS_IRQ_PHY2);
sky2_write32(hw, B0_IMSK, hw->intr_mask);
+
schedule_work(&sky2->phy_task);
}
@@ -2141,6 +2148,7 @@
if (status == 0 || status == ~0)
return IRQ_NONE;
+ spin_lock(&hw->hw_lock);
if (status & Y2_IS_HW_ERR)
sky2_hw_intr(hw);
@@ -2169,7 +2177,7 @@
sky2_write32(hw, B0_Y2_SP_ICR, 2);
- sky2_read32(hw, B0_IMSK);
+ spin_unlock(&hw->hw_lock);
return IRQ_HANDLED;
}
@@ -3241,6 +3249,7 @@
goto err_out_free_hw;
}
hw->pm_cap = pm_cap;
+ spin_lock_init(&hw->hw_lock);
#ifdef __BIG_ENDIAN
/* byte swap descriptors in hardware */
--- sky2.orig/drivers/net/sky2.h 2006-02-22 11:33:41.000000000 -0800
+++ sky2/drivers/net/sky2.h 2006-02-22 11:33:45.000000000 -0800
@@ -1876,8 +1876,9 @@
struct sky2_hw {
void __iomem *regs;
struct pci_dev *pdev;
- u32 intr_mask;
struct net_device *dev[2];
+ spinlock_t hw_lock;
+ u32 intr_mask;
int pm_cap;
int msi;
--
-
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