[38/46] i2c: Hide probe errors caused by ACPI resource conflicts

[Greg KH <gregkh@suse.de>]

[-- Attachment #1: i2c-hide-probe-errors-caused-by-acpi-resource-conflicts.patch --]
[-- Type: text/plain, Size: 4021 bytes --]

2.6.31-stable review patch.  If anyone has any objections, please let us know.

------------------
From: Jean Delvare <khali@linux-fr.org>

commit 18669eabde2ff5fc446e72e043f0539059763438 upstream.

When an ACPI resource conflict is detected, error messages are already
printed by ACPI. There's no point in causing the driver core to print
more error messages, so return one of the error codes for which no
message is printed.

This fixes bug #14293:
http://bugzilla.kernel.org/show_bug.cgi?id=14293

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

---
 drivers/i2c/busses/i2c-amd756.c  |    2 +-
 drivers/i2c/busses/i2c-amd8111.c |    4 +++-
 drivers/i2c/busses/i2c-i801.c    |    4 +++-
 drivers/i2c/busses/i2c-isch.c    |    2 +-
 drivers/i2c/busses/i2c-piix4.c   |    4 ++--
 drivers/i2c/busses/i2c-sis96x.c  |    2 +-
 drivers/i2c/busses/i2c-viapro.c  |    2 +-
 7 files changed, 12 insertions(+), 8 deletions(-)

--- a/drivers/i2c/busses/i2c-amd756.c
+++ b/drivers/i2c/busses/i2c-amd756.c
@@ -364,7 +364,7 @@ static int __devinit amd756_probe(struct
 	error = acpi_check_region(amd756_ioport, SMB_IOSIZE,
 				  amd756_driver.name);
 	if (error)
-		return error;
+		return -ENODEV;
 
 	if (!request_region(amd756_ioport, SMB_IOSIZE, amd756_driver.name)) {
 		dev_err(&pdev->dev, "SMB region 0x%x already in use!\n",
--- a/drivers/i2c/busses/i2c-amd8111.c
+++ b/drivers/i2c/busses/i2c-amd8111.c
@@ -376,8 +376,10 @@ static int __devinit amd8111_probe(struc
 	smbus->size = pci_resource_len(dev, 0);
 
 	error = acpi_check_resource_conflict(&dev->resource[0]);
-	if (error)
+	if (error) {
+		error = -ENODEV;
 		goto out_kfree;
+	}
 
 	if (!request_region(smbus->base, smbus->size, amd8111_driver.name)) {
 		error = -EBUSY;
--- a/drivers/i2c/busses/i2c-i801.c
+++ b/drivers/i2c/busses/i2c-i801.c
@@ -732,8 +732,10 @@ static int __devinit i801_probe(struct p
 	}
 
 	err = acpi_check_resource_conflict(&dev->resource[SMBBAR]);
-	if (err)
+	if (err) {
+		err = -ENODEV;
 		goto exit;
+	}
 
 	err = pci_request_region(dev, SMBBAR, i801_driver.name);
 	if (err) {
--- a/drivers/i2c/busses/i2c-isch.c
+++ b/drivers/i2c/busses/i2c-isch.c
@@ -281,7 +281,7 @@ static int __devinit sch_probe(struct pc
 		return -ENODEV;
 	}
 	if (acpi_check_region(sch_smba, SMBIOSIZE, sch_driver.name))
-		return -EBUSY;
+		return -ENODEV;
 	if (!request_region(sch_smba, SMBIOSIZE, sch_driver.name)) {
 		dev_err(&dev->dev, "SMBus region 0x%x already in use!\n",
 			sch_smba);
--- a/drivers/i2c/busses/i2c-piix4.c
+++ b/drivers/i2c/busses/i2c-piix4.c
@@ -168,7 +168,7 @@ static int __devinit piix4_setup(struct 
 	}
 
 	if (acpi_check_region(piix4_smba, SMBIOSIZE, piix4_driver.name))
-		return -EBUSY;
+		return -ENODEV;
 
 	if (!request_region(piix4_smba, SMBIOSIZE, piix4_driver.name)) {
 		dev_err(&PIIX4_dev->dev, "SMBus region 0x%x already in use!\n",
@@ -259,7 +259,7 @@ static int __devinit piix4_setup_sb800(s
 
 	piix4_smba = ((smba_en_hi << 8) | smba_en_lo) & 0xffe0;
 	if (acpi_check_region(piix4_smba, SMBIOSIZE, piix4_driver.name))
-		return -EBUSY;
+		return -ENODEV;
 
 	if (!request_region(piix4_smba, SMBIOSIZE, piix4_driver.name)) {
 		dev_err(&PIIX4_dev->dev, "SMBus region 0x%x already in use!\n",
--- a/drivers/i2c/busses/i2c-sis96x.c
+++ b/drivers/i2c/busses/i2c-sis96x.c
@@ -280,7 +280,7 @@ static int __devinit sis96x_probe(struct
 
 	retval = acpi_check_resource_conflict(&dev->resource[SIS96x_BAR]);
 	if (retval)
-		return retval;
+		return -ENODEV;
 
 	/* Everything is happy, let's grab the memory and set things up. */
 	if (!request_region(sis96x_smbus_base, SMB_IOSIZE,
--- a/drivers/i2c/busses/i2c-viapro.c
+++ b/drivers/i2c/busses/i2c-viapro.c
@@ -365,7 +365,7 @@ static int __devinit vt596_probe(struct 
 found:
 	error = acpi_check_region(vt596_smba, 8, vt596_driver.name);
 	if (error)
-		return error;
+		return -ENODEV;
 
 	if (!request_region(vt596_smba, 8, vt596_driver.name)) {
 		dev_err(&pdev->dev, "SMBus region 0x%x already in use!\n",