intel_th: Streamline the subdevice tree accessors

Make to_intel_th*() accessors available from the main header file.

Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>

diff --git a/drivers/hwtracing/intel_th/core.c b/drivers/hwtracing/intel_th/core.c
index 8da567abc0cee3241e3b05a29f99fd33bed70e63..e6d302ba1707517ef2e2ebf59821eadcdebf66c9 100644 (file)
--- a/drivers/hwtracing/intel_th/core.c
+++ b/drivers/hwtracing/intel_th/core.c
@@ -156,21 +156,6 @@ static struct device_type intel_th_source_device_type = {
        .release        = intel_th_device_release,
 };
 
-static struct intel_th *to_intel_th(struct intel_th_device *thdev)
-{
-       /*
-        * subdevice tree is flat: if this one is not a switch, its
-        * parent must be
-        */
-       if (thdev->type != INTEL_TH_SWITCH)
-               thdev = to_intel_th_hub(thdev);
-
-       if (WARN_ON_ONCE(!thdev || thdev->type != INTEL_TH_SWITCH))
-               return NULL;
-
-       return dev_get_drvdata(thdev->dev.parent);
-}
-
 static char *intel_th_output_devnode(struct device *dev, umode_t *mode,
                                     kuid_t *uid, kgid_t *gid)
 {

diff --git a/drivers/hwtracing/intel_th/intel_th.h b/drivers/hwtracing/intel_th/intel_th.h
index c03f28ef6409f5df5d045eec36be199a915cb1aa..496286ce79e82ad8909da7108474222cf2dcfd15 100644 (file)
--- a/drivers/hwtracing/intel_th/intel_th.h
+++ b/drivers/hwtracing/intel_th/intel_th.h
@@ -173,7 +173,7 @@ struct intel_th_driver {
        ((_d) ? to_intel_th_driver(_d) : NULL)
 
 static inline struct intel_th_device *
-to_intel_th_hub(struct intel_th_device *thdev)
+to_intel_th_parent(struct intel_th_device *thdev)
 {
        struct device *parent = thdev->dev.parent;
 
@@ -183,6 +183,29 @@ to_intel_th_hub(struct intel_th_device *thdev)
        return to_intel_th_device(parent);
 }
 
+static inline struct intel_th_device *
+to_intel_th_hub(struct intel_th_device *thdev)
+{
+       /*
+        * subdevice tree is flat: if this one is not a switch, its
+        * parent must be
+        */
+       if (thdev->type == INTEL_TH_SWITCH)
+               return thdev;
+
+       return to_intel_th_parent(thdev);
+}
+
+static inline struct intel_th *to_intel_th(struct intel_th_device *thdev)
+{
+       thdev = to_intel_th_hub(thdev);
+
+       if (WARN_ON_ONCE(!thdev || thdev->type != INTEL_TH_SWITCH))
+               return NULL;
+
+       return dev_get_drvdata(thdev->dev.parent);
+}
+
 struct intel_th *
 intel_th_alloc(struct device *dev, struct resource *devres,
               unsigned int ndevres, int irq);