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[PATCH] sky2: msi enhancements.

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If using Message Signaled Interrupts (MSI) then the IRQ will never
be shared. Don't call pci_disable_msi() unless using MSI.

Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Stephen Hemminger 2006-12-01 14:29:37 -08:00 committed by Jeff Garzik
parent 794b2bd20f
commit b0a20ded56
2 changed files with 11 additions and 8 deletions
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17
drivers/net/sky2.c
View file

@ -3311,7 +3311,7 @@ static irqreturn_t __devinit sky2_test_intr(int irq, void *dev_id)
return IRQ_NONE;
if (status & Y2_IS_IRQ_SW) {
hw->msi_detected = 1;
hw->msi = 1;
wake_up(&hw->msi_wait);
sky2_write8(hw, B0_CTST, CS_CL_SW_IRQ);
}
@ -3330,7 +3330,7 @@ static int __devinit sky2_test_msi(struct sky2_hw *hw)
sky2_write32(hw, B0_IMSK, Y2_IS_IRQ_SW);
err = request_irq(pdev->irq, sky2_test_intr, IRQF_SHARED, DRV_NAME, hw);
err = request_irq(pdev->irq, sky2_test_intr, 0, DRV_NAME, hw);
if (err) {
printk(KERN_ERR PFX "%s: cannot assign irq %d\n",
pci_name(pdev), pdev->irq);
@ -3340,9 +3340,9 @@ static int __devinit sky2_test_msi(struct sky2_hw *hw)
sky2_write8(hw, B0_CTST, CS_ST_SW_IRQ);
sky2_read8(hw, B0_CTST);
wait_event_timeout(hw->msi_wait, hw->msi_detected, HZ/10);
wait_event_timeout(hw->msi_wait, hw->msi, HZ/10);
if (!hw->msi_detected) {
if (!hw->msi) {
/* MSI test failed, go back to INTx mode */
printk(KERN_INFO PFX "%s: No interrupt generated using MSI, "
"switching to INTx mode.\n",
@ -3475,7 +3475,8 @@ static int __devinit sky2_probe(struct pci_dev *pdev,
goto err_out_free_netdev;
}
err = request_irq(pdev->irq, sky2_intr, IRQF_SHARED, dev->name, hw);
err = request_irq(pdev->irq, sky2_intr, hw->msi ? 0 : IRQF_SHARED,
dev->name, hw);
if (err) {
printk(KERN_ERR PFX "%s: cannot assign irq %d\n",
pci_name(pdev), pdev->irq);
@ -3505,7 +3506,8 @@ static int __devinit sky2_probe(struct pci_dev *pdev,
return 0;
err_out_unregister:
pci_disable_msi(pdev);
if (hw->msi)
pci_disable_msi(pdev);
unregister_netdev(dev);
err_out_free_netdev:
free_netdev(dev);
@ -3548,7 +3550,8 @@ static void __devexit sky2_remove(struct pci_dev *pdev)
sky2_read8(hw, B0_CTST);
free_irq(pdev->irq, hw);
pci_disable_msi(pdev);
if (hw->msi)
pci_disable_msi(pdev);
pci_free_consistent(pdev, STATUS_LE_BYTES, hw->st_le, hw->st_dma);
pci_release_regions(pdev);
pci_disable_device(pdev);

2
drivers/net/sky2.h
View file

@ -1900,7 +1900,7 @@ struct sky2_hw {
dma_addr_t st_dma;
struct timer_list idle_timer;
int msi_detected;
int msi;
wait_queue_head_t msi_wait;
};