From d6fcb3b9cf776e3f748709cd3091a72cb3855c29 Mon Sep 17 00:00:00 2001 From: Daniel Ritz Date: Tue, 27 Jun 2006 18:40:54 +0200 Subject: [PATCH] [PATCH] i2c-i801.c: don't pci_disable_device() after it was just enabled Commit 02dd7ae2892e5ceff111d032769c78d3377df970 ("[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: Daniel Ritz Signed-off-by: Linus Torvalds --- drivers/i2c/busses/i2c-i801.c | 16 ++++++++++------ 1 file changed, 10 insertions(+), 6 deletions(-) diff --git a/drivers/i2c/busses/i2c-i801.c b/drivers/i2c/busses/i2c-i801.c index 3e0d04d5a800..8b46ef7d9ff8 100644 --- a/drivers/i2c/busses/i2c-i801.c +++ b/drivers/i2c/busses/i2c-i801.c @@ -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 = { -- 2.34.1