Commit d6fcb3b9 authored by Daniel Ritz's avatar Daniel Ritz Committed by Linus Torvalds

[PATCH] i2c-i801.c: don't pci_disable_device() after it was just enabled

Commit 02dd7ae2 ("[PATCH] i2c-i801:
Merge setup function") has a missing return 0 in the _probe() function.
This means the error path is always executed and pci_disable_device() is
called even when the device just got successfully enabled.

Having the SMBus device disabled makes some systems (eg.
Fujitsu-Siemens Lifebook E8010) hang hard during power-off.

Intead of reverting the whole commit this patch fixes it up:
- don't ever call pci_disable_device(), also not in the _remove() function
  to avoid hangs
- fix missing pci_release_region() in error path
Signed-off-by: default avatarDaniel Ritz <daniel.ritz@gmx.ch>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent f17a2686
......@@ -488,7 +488,7 @@ static int __devinit i801_probe(struct pci_dev *dev, const struct pci_device_id
dev_err(&dev->dev, "SMBus base address uninitialized, "
"upgrade BIOS\n");
err = -ENODEV;
goto exit_disable;
goto exit;
}
err = pci_request_region(dev, SMBBAR, i801_driver.name);
......@@ -496,7 +496,7 @@ static int __devinit i801_probe(struct pci_dev *dev, const struct pci_device_id
dev_err(&dev->dev, "Failed to request SMBus region "
"0x%lx-0x%lx\n", i801_smba,
pci_resource_end(dev, SMBBAR));
goto exit_disable;
goto exit;
}
pci_read_config_byte(I801_dev, SMBHSTCFG, &temp);
......@@ -520,11 +520,12 @@ static int __devinit i801_probe(struct pci_dev *dev, const struct pci_device_id
err = i2c_add_adapter(&i801_adapter);
if (err) {
dev_err(&dev->dev, "Failed to add SMBus adapter\n");
goto exit_disable;
goto exit_release;
}
return 0;
exit_disable:
pci_disable_device(dev);
exit_release:
pci_release_region(dev, SMBBAR);
exit:
return err;
}
......@@ -533,7 +534,10 @@ static void __devexit i801_remove(struct pci_dev *dev)
{
i2c_del_adapter(&i801_adapter);
pci_release_region(dev, SMBBAR);
pci_disable_device(dev);
/*
* do not call pci_disable_device(dev) since it can cause hard hangs on
* some systems during power-off (eg. Fujitsu-Siemens Lifebook E8010)
*/
}
static struct pci_driver i801_driver = {
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment