ACPI / Fan: Use bus id as the name for non PNP0C0B (Fan) devices

The _ART (Active Cooling Relationship Table), specifies relationship
among heat generating sources to a target active cooling device like
fan. The _ART table refers to actual bus id name for specifying relationship.
Naming "Fan" is not enough as name in the _ART table can change on every
platform, to establish relationship for user space thermal controllers.

Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

1 files changed, 7 insertions, 1 deletions

diff --git a/drivers/acpi/fan.c b/drivers/acpi/fan.c
index caf9b76b7ef8..7a36f02598a6 100644
--- a/drivers/acpi/fan.c
+++ b/drivers/acpi/fan.c
@@ -325,6 +325,7 @@ static int acpi_fan_probe(struct platform_device *pdev)
         struct thermal_cooling_device *cdev;
         struct acpi_fan *fan;
         struct acpi_device *device = ACPI_COMPANION(&pdev->dev);
+        char *name;
 
         fan = devm_kzalloc(&pdev->dev, sizeof(*fan), GFP_KERNEL);
         if (!fan) {
@@ -346,7 +347,12 @@ static int acpi_fan_probe(struct platform_device *pdev)
                 }
         }
 
-        cdev = thermal_cooling_device_register("Fan", device,
+        if (!strncmp(pdev->name, "PNP0C0B", strlen("PNP0C0B")))
+                name = "Fan";
+        else
+                name = acpi_device_bid(device);
+
+        cdev = thermal_cooling_device_register(name, device,
                                                 &fan_cooling_ops);
         if (IS_ERR(cdev)) {
                 result = PTR_ERR(cdev);