Messages in this thread Patch in this message | | | From | Daniel Ritz <> | Subject | Regression in -git / [PATCH] i2c-i801.c: don't pci_disable_device() after it was just enabled | Date | Tue, 27 Jun 2006 18:40:54 +0200 |
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yet another small regression in current git...so only 2 left for me:) rgds -daniel
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[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 <daniel.ritz@gmx.ch>
diff --git a/drivers/i2c/busses/i2c-i801.c b/drivers/i2c/busses/i2c-i801.c index 3e0d04d..8b46ef7 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 p 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 p 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 p 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 { 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 = { - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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