On Sat, Aug 26, 2006 at 05:41:58PM +0100, Alan Cox wrote:
> Ar Gwe, 2006-08-25 am 17:02 -0700, ysgrifennodd Valerie Henson:
> > pci_set_power_state(pdev, PCI_D0);
> > pci_restore_state(pdev);
> >
> > - pci_enable_device(pdev);
> > + if ((retval = pci_enable_device(pdev))) {
> > + printk (KERN_ERR "tulip: pci_enable_device failed in resume\n");
> > + return retval;
> > + }
> Should you not stick it back in D3 if you are being neat about this ?
I don't know. Any thoughts from the peanut gallery? I've spent some
time trolling both docs and other drivers, but I haven't yet found an
example of a driver that correctly handles all the resume error cases.
Also, at least one other driver does a pci_disable_device() if the
request_irq() fails - should tulip do this too?
> NAK: What about rtnl_lock()
Gah. Thanks, how about the patch below instead?
-VAL
Subject: [TULIP] Handle pci_enable_device() errors in resume
Signed-off-by: Valerie Henson <[email protected]>
Cc: Jeff Garzik <[email protected]>
---
drivers/net/tulip/de2104x.c | 16 ++++++++++------
drivers/net/tulip/tulip_core.c | 5 ++++-
drivers/net/tulip/winbond-840.c | 12 ++++++++----
3 files changed, 22 insertions(+), 11 deletions(-)
--- linux-2.6.18-rc4-mm1-tulip.orig/drivers/net/tulip/tulip_core.c
+++ linux-2.6.18-rc4-mm1-tulip/drivers/net/tulip/tulip_core.c
@@ -1780,7 +1780,10 @@ static int tulip_resume(struct pci_dev *
pci_set_power_state(pdev, PCI_D0);
pci_restore_state(pdev);
- pci_enable_device(pdev);
+ if ((retval = pci_enable_device(pdev))) {
+ printk (KERN_ERR "tulip: pci_enable_device failed in resume\n");
+ return retval;
+ }
if ((retval = request_irq(dev->irq, &tulip_interrupt, IRQF_SHARED, dev->name, dev))) {
printk (KERN_ERR "tulip: request_irq failed in resume\n");
--- linux-2.6.18-rc4-mm1-tulip.orig/drivers/net/tulip/winbond-840.c
+++ linux-2.6.18-rc4-mm1-tulip/drivers/net/tulip/winbond-840.c
@@ -1626,14 +1626,18 @@ static int w840_resume (struct pci_dev *
{
struct net_device *dev = pci_get_drvdata (pdev);
struct netdev_private *np = netdev_priv(dev);
+ int retval = 0;
rtnl_lock();
if (netif_device_present(dev))
goto out; /* device not suspended */
if (netif_running(dev)) {
- pci_enable_device(pdev);
- /* pci_power_on(pdev); */
-
+ if ((retval = pci_enable_device(pdev))) {
+ printk (KERN_ERR
+ "%s: pci_enable_device failed in resume\n",
+ dev->name);
+ goto out;
+ }
spin_lock_irq(&np->lock);
iowrite32(1, np->base_addr+PCIBusCfg);
ioread32(np->base_addr+PCIBusCfg);
@@ -1651,7 +1655,7 @@ static int w840_resume (struct pci_dev *
}
out:
rtnl_unlock();
- return 0;
+ return retval;
}
#endif
--- linux-2.6.18-rc4-mm1-tulip.orig/drivers/net/tulip/de2104x.c
+++ linux-2.6.18-rc4-mm1-tulip/drivers/net/tulip/de2104x.c
@@ -2138,17 +2138,21 @@ static int de_resume (struct pci_dev *pd
{
struct net_device *dev = pci_get_drvdata (pdev);
struct de_private *de = dev->priv;
+ int retval = 0;
rtnl_lock();
if (netif_device_present(dev))
goto out;
- if (netif_running(dev)) {
- pci_enable_device(pdev);
- de_init_hw(de);
- netif_device_attach(dev);
- } else {
- netif_device_attach(dev);
+ if (!netif_running(dev))
+ goto out_attach;
+ if ((retval = pci_enable_device(pdev))) {
+ printk (KERN_ERR "%s: pci_enable_device failed in resume\n",
+ dev->name);
+ goto out;
}
+ de_init_hw(de);
+out_attach:
+ netif_device_attach(dev);
out:
rtnl_unlock();
return 0;
-
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