hwmon: (acpi_power_meter) Don't crash the kernel unnecessarily

acpi_power_meter crashes the kernel if it detects an unexpected event
or an internal implementation error. While the detected conditions
suggest that there is a bug in the code, the condition is not fatal.
Replace BUG() with WARN().

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

diff --git a/drivers/hwmon/acpi_power_meter.c b/drivers/hwmon/acpi_power_meter.c
index a9e3d0152c0b5d23ae6d651c72c8782d60519987..51b045b20c1a2753015f1d1a1cc3f6f519cdbd4a 100644 (file)
--- a/drivers/hwmon/acpi_power_meter.c
+++ b/drivers/hwmon/acpi_power_meter.c
@@ -381,8 +381,10 @@ static ssize_t show_str(struct device *dev,
                val = resource->oem_info;
                break;
        default:
-               BUG();
+               WARN(1, "Implementation error: unexpected attribute index %d\n",
+                    attr->index);
                val = "";
+               break;
        }
 
        return sprintf(buf, "%s\n", val);
@@ -436,7 +438,9 @@ static ssize_t show_val(struct device *dev,
                val = resource->trip[attr->index - 7] * 1000;
                break;
        default:
-               BUG();
+               WARN(1, "Implementation error: unexpected attribute index %d\n",
+                    attr->index);
+               break;
        }
 
        return sprintf(buf, "%llu\n", val);
@@ -855,7 +859,8 @@ static void acpi_power_meter_notify(struct acpi_device *device, u32 event)
                dev_info(&device->dev, "Capping in progress.\n");
                break;
        default:
-               BUG();
+               WARN(1, "Unexpected event %d\n", event);
+               break;
        }
        mutex_unlock(&resource->lock);