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i2c: scmi: Fix probe error on devices with an empty SMB0001 ACPI device node 

Some AMD based HP laptops have a SMB0001 ACPI device node which does not
define any methods.

This leads to the following error in dmesg:

[    5.222731] cmi: probe of SMB0001:00 failed with error -5

This commit makes acpi_smbus_cmi_add() return -ENODEV instead in this case
silencing the error. In case of a failure of the i2c_add_adapter() call
this commit now propagates the error from that call instead of -EIO.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
This commit is contained in:
Hans de Goede 2018-11-21 10:19:55 +01:00 committed by Wolfram Sang
parent 6c7f25cae5
commit 0544ee4b1a
1 changed files with 7 additions and 3 deletions
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10
drivers/i2c/busses/i2c-scmi.c
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@ -367,6 +367,7 @@ static int acpi_smbus_cmi_add(struct acpi_device *device)
{
struct acpi_smbus_cmi *smbus_cmi;
const struct acpi_device_id *id;
int ret;
smbus_cmi = kzalloc(sizeof(struct acpi_smbus_cmi), GFP_KERNEL);
if (!smbus_cmi)
@ -388,8 +389,10 @@ static int acpi_smbus_cmi_add(struct acpi_device *device)
acpi_walk_namespace(ACPI_TYPE_METHOD, smbus_cmi->handle, 1,
acpi_smbus_cmi_query_methods, NULL, smbus_cmi, NULL);
if (smbus_cmi->cap_info == 0)
if (smbus_cmi->cap_info == 0) {
ret = -ENODEV;
goto err;
}
snprintf(smbus_cmi->adapter.name, sizeof(smbus_cmi->adapter.name),
"SMBus CMI adapter %s",
@ -400,7 +403,8 @@ static int acpi_smbus_cmi_add(struct acpi_device *device)
smbus_cmi->adapter.class = I2C_CLASS_HWMON | I2C_CLASS_SPD;
smbus_cmi->adapter.dev.parent = &device->dev;
if (i2c_add_adapter(&smbus_cmi->adapter)) {
ret = i2c_add_adapter(&smbus_cmi->adapter);
if (ret) {
dev_err(&device->dev, "Couldn't register adapter!\n");
goto err;
}
@ -410,7 +414,7 @@ static int acpi_smbus_cmi_add(struct acpi_device *device)
err:
kfree(smbus_cmi);
device->driver_data = NULL;
return -EIO;
return ret;
}
static int acpi_smbus_cmi_remove(struct acpi_device *device)