[PATCH net-next-2.6 v9 16/20] pch_can: Move MSI processing to probe/remove processing

Tomoya MORINAGA
2010-12-13T06:22:20Z

Currently, in case this driver is integrated as module, and when this
module is re-installed, no interrupts is to be occurred.
For the above issue, move MSI processing to open/release processing.

Signed-off-by: Tomoya MORINAGA <tomoya-linux@dsn.okisemi.com>
---
drivers/net/can/pch_can.c | 29 ++++++++++++++---------------
1 files changed, 14 insertions(+), 15 deletions(-)

diff --git a/drivers/net/can/pch_can.c b/drivers/net/can/pch_can.c
index a1fd3be..ace1fe7 100644
--- a/drivers/net/can/pch_can.c
+++ b/drivers/net/can/pch_can.c
@@ -845,15 +845,6 @@ static int pch_can_open(struct net_device *ndev)
struct pch_can_priv *priv = netdev_priv(ndev);
int retval;

- retval = pci_enable_msi(priv->dev);
- if (retval) {
- netdev_err(ndev, "PCH CAN opened without MSI\n");
- priv->use_msi = 0;
- } else {
- netdev_err(ndev, "PCH CAN opened with MSI\n");
- priv->use_msi = 1;
- }
-
/* Regstering the interrupt. */
retval = request_irq(priv->dev->irq, pch_can_interrupt, IRQF_SHARED,
ndev->name, ndev);
@@ -879,9 +870,6 @@ static int pch_can_open(struct net_device *ndev)
err_open_candev:
free_irq(priv->dev->irq, ndev);
req_irq_err:
- if (priv->use_msi)
- pci_disable_msi(priv->dev);
-
pch_can_release(priv);

return retval;
@@ -895,8 +883,6 @@ static int pch_close(struct net_device *ndev)
napi_disable(&priv->napi);
pch_can_release(priv);
free_irq(priv->dev->irq, ndev);
- if (priv->use_msi)
- pci_disable_msi(priv->dev);
close_candev(ndev);
priv->can.state = CAN_STATE_STOPPED;
return 0;
@@ -975,12 +961,14 @@ static void __devexit pch_can_remove(struct pci_dev *pdev)
struct pch_can_priv *priv = netdev_priv(ndev);

unregister_candev(priv->ndev);
- free_candev(priv->ndev);
pci_iounmap(pdev, priv->regs);
+ if (priv->use_msi)
+ pci_disable_msi(priv->dev);
pci_release_regions(pdev);
pci_disable_device(pdev);
pci_set_drvdata(pdev, NULL);
pch_can_reset(priv);
+ free_candev(priv->ndev);
}

#ifdef CONFIG_PM
@@ -1244,6 +1232,15 @@ static int __devinit pch_can_probe(struct pci_dev *pdev,

netif_napi_add(ndev, &priv->napi, pch_can_poll, PCH_RX_OBJ_END);

+ rc = pci_enable_msi(priv->dev);
+ if (rc) {
+ netdev_err(ndev, "PCH CAN opened without MSI\n");
+ priv->use_msi = 0;
+ } else {
+ netdev_err(ndev, "PCH CAN opened with MSI\n");
+ priv->use_msi = 1;
+ }
+
rc = register_candev(ndev);
if (rc) {
dev_err(&pdev->dev, "Failed register_candev %d\n", rc);
@@ -1253,6 +1250,8 @@ static int __devinit pch_can_probe(struct pci_dev *pdev,
return 0;

probe_exit_reg_candev:
+ if (priv->use_msi)
+ pci_disable_msi(priv->dev);
free_candev(ndev);
probe_exit_alloc_candev:
pci_iounmap(pdev, addr);
--
1.6.0.6