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i2c: Fix error value returned by several bus drivers

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When adding checks for ACPI resource conflicts to many bus drivers,
not enough attention was paid to the error paths, and for several
drivers this causes 0 to be returned on error in some cases. Fix this
by properly returning a non-zero value on every error.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: stable@kernel.org
This commit is contained in:
Jean Delvare 2012-01-12 20:32:03 +01:00 committed by Jean Delvare
parent a429638cac
commit 7c1f59c9d5
5 changed files with 20 additions and 10 deletions
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11
drivers/i2c/busses/i2c-ali1535.c
View File

@ -140,7 +140,7 @@ static unsigned short ali1535_smba;
defined to make the transition easier. */
static int __devinit ali1535_setup(struct pci_dev *dev)
{
int retval = -ENODEV;
int retval;
unsigned char temp;
/* Check the following things:
@ -155,6 +155,7 @@ static int __devinit ali1535_setup(struct pci_dev *dev)
if (ali1535_smba == 0) {
dev_warn(&dev->dev,
"ALI1535_smb region uninitialized - upgrade BIOS?\n");
retval = -ENODEV;
goto exit;
}
@ -167,6 +168,7 @@ static int __devinit ali1535_setup(struct pci_dev *dev)
ali1535_driver.name)) {
dev_err(&dev->dev, "ALI1535_smb region 0x%x already in use!\n",
ali1535_smba);
retval = -EBUSY;
goto exit;
}
@ -174,6 +176,7 @@ static int __devinit ali1535_setup(struct pci_dev *dev)
pci_read_config_byte(dev, SMBCFG, &temp);
if ((temp & ALI1535_SMBIO_EN) == 0) {
dev_err(&dev->dev, "SMB device not enabled - upgrade BIOS?\n");
retval = -ENODEV;
goto exit_free;
}
@ -181,6 +184,7 @@ static int __devinit ali1535_setup(struct pci_dev *dev)
pci_read_config_byte(dev, SMBHSTCFG, &temp);
if ((temp & 1) == 0) {
dev_err(&dev->dev, "SMBus controller not enabled - upgrade BIOS?\n");
retval = -ENODEV;
goto exit_free;
}
@ -198,12 +202,11 @@ static int __devinit ali1535_setup(struct pci_dev *dev)
dev_dbg(&dev->dev, "SMBREV = 0x%X\n", temp);
dev_dbg(&dev->dev, "ALI1535_smba = 0x%X\n", ali1535_smba);
retval = 0;
exit:
return retval;
return 0;
exit_free:
release_region(ali1535_smba, ALI1535_SMB_IOSIZE);
exit:
return retval;
}

2
drivers/i2c/busses/i2c-nforce2.c
View File

@ -356,7 +356,7 @@ static int __devinit nforce2_probe_smb (struct pci_dev *dev, int bar,
error = acpi_check_region(smbus->base, smbus->size,
nforce2_driver.name);
if (error)
return -1;
return error;
if (!request_region(smbus->base, smbus->size, nforce2_driver.name)) {
dev_err(&smbus->adapter.dev, "Error requesting region %02x .. %02X for %s\n",

4
drivers/i2c/busses/i2c-sis5595.c
View File

@ -147,7 +147,7 @@ static int __devinit sis5595_setup(struct pci_dev *SIS5595_dev)
u16 a;
u8 val;
int *i;
int retval = -ENODEV;
int retval;
/* Look for imposters */
for (i = blacklist; *i != 0; i++) {
@ -223,7 +223,7 @@ static int __devinit sis5595_setup(struct pci_dev *SIS5595_dev)
error:
release_region(sis5595_base + SMB_INDEX, 2);
return retval;
return -ENODEV;
}
static int sis5595_transaction(struct i2c_adapter *adap)

6
drivers/i2c/busses/i2c-sis630.c
View File

@ -393,7 +393,7 @@ static int __devinit sis630_setup(struct pci_dev *sis630_dev)
{
unsigned char b;
struct pci_dev *dummy = NULL;
int retval = -ENODEV, i;
int retval, i;
/* check for supported SiS devices */
for (i=0; supported[i] > 0 ; i++) {
@ -418,18 +418,21 @@ static int __devinit sis630_setup(struct pci_dev *sis630_dev)
*/
if (pci_read_config_byte(sis630_dev, SIS630_BIOS_CTL_REG,&b)) {
dev_err(&sis630_dev->dev, "Error: Can't read bios ctl reg\n");
retval = -ENODEV;
goto exit;
}
/* if ACPI already enabled , do nothing */
if (!(b & 0x80) &&
pci_write_config_byte(sis630_dev, SIS630_BIOS_CTL_REG, b | 0x80)) {
dev_err(&sis630_dev->dev, "Error: Can't enable ACPI\n");
retval = -ENODEV;
goto exit;
}
/* Determine the ACPI base address */
if (pci_read_config_word(sis630_dev,SIS630_ACPI_BASE_REG,&acpi_base)) {
dev_err(&sis630_dev->dev, "Error: Can't determine ACPI base address\n");
retval = -ENODEV;
goto exit;
}
@ -445,6 +448,7 @@ static int __devinit sis630_setup(struct pci_dev *sis630_dev)
sis630_driver.name)) {
dev_err(&sis630_dev->dev, "SMBus registers 0x%04x-0x%04x already "
"in use!\n", acpi_base + SMB_STS, acpi_base + SMB_SAA);
retval = -EBUSY;
goto exit;
}

7
drivers/i2c/busses/i2c-viapro.c
View File

@ -324,7 +324,7 @@ static int __devinit vt596_probe(struct pci_dev *pdev,
const struct pci_device_id *id)
{
unsigned char temp;
int error = -ENODEV;
int error;
/* Determine the address of the SMBus areas */
if (force_addr) {
@ -390,6 +390,7 @@ static int __devinit vt596_probe(struct pci_dev *pdev,
dev_err(&pdev->dev, "SMBUS: Error: Host SMBus "
"controller not enabled! - upgrade BIOS or "
"use force=1\n");
error = -ENODEV;
goto release_region;
}
}
@ -422,9 +423,11 @@ static int __devinit vt596_probe(struct pci_dev *pdev,
"SMBus Via Pro adapter at %04x", vt596_smba);
vt596_pdev = pci_dev_get(pdev);
if (i2c_add_adapter(&vt596_adapter)) {
error = i2c_add_adapter(&vt596_adapter);
if (error) {
pci_dev_put(vt596_pdev);
vt596_pdev = NULL;
goto release_region;
}
/* Always return failure here. This is to allow other drivers to bind