hwmon: (ibmaem) Fix error paths

I am under the impression that error paths in functions
aem_init_aem1_inst() and aem_init_aem2_inst() are incorrect. In
several cases, the function returns 0 on error, which I suspect is
not intended. Fix this by properly tracking error codes.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Darrick J. Wong <djwong@us.ibm.com>
Acked-by: Guenter Roeck <guenter.roeck@ericsson.com>

diff --git a/drivers/hwmon/ibmaem.c b/drivers/hwmon/ibmaem.c
index 783d0c17b762dc504babef2e5a039c033b3d8f77..aba6b59dc3a558c7c5df20673385b11df18885a7 100644 (file)
--- a/drivers/hwmon/ibmaem.c
+++ b/drivers/hwmon/ibmaem.c
@@ -570,24 +570,26 @@ static int aem_init_aem1_inst(struct aem_ipmi_data *probe, u8 module_handle)
        platform_set_drvdata(data->pdev, data);
 
        /* Set up IPMI interface */
-       if (aem_init_ipmi_data(&data->ipmi, probe->interface,
-                              probe->bmc_device))
+       res = aem_init_ipmi_data(&data->ipmi, probe->interface,
+                                probe->bmc_device);
+       if (res)
                goto ipmi_err;
 
        /* Register with hwmon */
        data->hwmon_dev = hwmon_device_register(&data->pdev->dev);
-
        if (IS_ERR(data->hwmon_dev)) {
                dev_err(&data->pdev->dev, "Unable to register hwmon "
                        "device for IPMI interface %d\n",
                        probe->interface);
+               res = PTR_ERR(data->hwmon_dev);
                goto hwmon_reg_err;
        }
 
        data->update = update_aem1_sensors;
 
        /* Find sensors */
-       if (aem1_find_sensors(data))
+       res = aem1_find_sensors(data);
+       if (res)
                goto sensor_err;
 
        /* Add to our list of AEM devices */
@@ -704,24 +706,26 @@ static int aem_init_aem2_inst(struct aem_ipmi_data *probe,
        platform_set_drvdata(data->pdev, data);
 
        /* Set up IPMI interface */
-       if (aem_init_ipmi_data(&data->ipmi, probe->interface,
-                              probe->bmc_device))
+       res = aem_init_ipmi_data(&data->ipmi, probe->interface,
+                                probe->bmc_device);
+       if (res)
                goto ipmi_err;
 
        /* Register with hwmon */
        data->hwmon_dev = hwmon_device_register(&data->pdev->dev);
-
        if (IS_ERR(data->hwmon_dev)) {
                dev_err(&data->pdev->dev, "Unable to register hwmon "
                        "device for IPMI interface %d\n",
                        probe->interface);
+               res = PTR_ERR(data->hwmon_dev);
                goto hwmon_reg_err;
        }
 
        data->update = update_aem2_sensors;
 
        /* Find sensors */
-       if (aem2_find_sensors(data))
+       res = aem2_find_sensors(data);
+       if (res)
                goto sensor_err;
 
        /* Add to our list of AEM devices */