AcoSail/kernel_optimize_test
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r8169: issue request_irq after the private data are completely initialized

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The irq handler schedules a NAPI poll request unconditionally as soon as
the status register is not clean. It has been there - and wrong - for
ages but a recent timing change made it apparently easier to trigger.

Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>
Cc: Jay Cliburn <jacliburn@bellsouth.net>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Francois Romieu 2007-04-02 22:59:59 +02:00 committed by Jeff Garzik
parent cda22aa94d
commit 99f252b097
1 changed files with 18 additions and 15 deletions
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33
drivers/net/r8169.c
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@ -66,6 +66,7 @@ VERSION 2.2LK <2005/01/25>
#include <linux/init.h>
#include <linux/dma-mapping.h>
#include <asm/system.h>
#include <asm/io.h>
#include <asm/irq.h>
@ -486,6 +487,7 @@ static int rtl8169_rx_interrupt(struct net_device *, struct rtl8169_private *,
void __iomem *);
static int rtl8169_change_mtu(struct net_device *dev, int new_mtu);
static void rtl8169_down(struct net_device *dev);
static void rtl8169_rx_clear(struct rtl8169_private *tp);
#ifdef CONFIG_R8169_NAPI
static int rtl8169_poll(struct net_device *dev, int *budget);
@ -1751,17 +1753,11 @@ static int rtl8169_open(struct net_device *dev)
{
struct rtl8169_private *tp = netdev_priv(dev);
struct pci_dev *pdev = tp->pci_dev;
int retval;
int retval = -ENOMEM;
rtl8169_set_rxbufsize(tp, dev);
retval =
request_irq(dev->irq, rtl8169_interrupt, IRQF_SHARED, dev->name, dev);
if (retval < 0)
goto out;
retval = -ENOMEM;
/*
* Rx and Tx desscriptors needs 256 bytes alignment.
* pci_alloc_consistent provides more.
@ -1769,19 +1765,26 @@ static int rtl8169_open(struct net_device *dev)
tp->TxDescArray = pci_alloc_consistent(pdev, R8169_TX_RING_BYTES,
&tp->TxPhyAddr);
if (!tp->TxDescArray)
goto err_free_irq;
goto out;
tp->RxDescArray = pci_alloc_consistent(pdev, R8169_RX_RING_BYTES,
&tp->RxPhyAddr);
if (!tp->RxDescArray)
goto err_free_tx;
goto err_free_tx_0;
retval = rtl8169_init_ring(dev);
if (retval < 0)
goto err_free_rx;
goto err_free_rx_1;
INIT_DELAYED_WORK(&tp->task, NULL);
smp_mb();
retval = request_irq(dev->irq, rtl8169_interrupt, IRQF_SHARED,
dev->name, dev);
if (retval < 0)
goto err_release_ring_2;
rtl8169_hw_start(dev);
rtl8169_request_timer(dev);
@ -1790,14 +1793,14 @@ static int rtl8169_open(struct net_device *dev)
out:
return retval;
err_free_rx:
err_release_ring_2:
rtl8169_rx_clear(tp);
err_free_rx_1:
pci_free_consistent(pdev, R8169_RX_RING_BYTES, tp->RxDescArray,
tp->RxPhyAddr);
err_free_tx:
err_free_tx_0:
pci_free_consistent(pdev, R8169_TX_RING_BYTES, tp->TxDescArray,
tp->TxPhyAddr);
err_free_irq:
free_irq(dev->irq, dev);
goto out;
}