In SSAM subsystem drivers that handle both ACPI and SSAM-native client
devices, we may want to check whether we have a SSAM (native) client
device. Further, we may want to do this even when instantiation thereof
cannot happen due to CONFIG_SURFACE_AGGREGATOR_BUS=n. Currently, doing
so causes an error due to an undefined reference error due to
ssam_device_type being placed in the bus source unit.
Therefore, if CONFIG_SURFACE_AGGREGATOR_BUS is not defined, simply let
is_ssam_device() return false to prevent this error.
Signed-off-by: Maximilian Luz <luzmaximilian@xxxxxxxxx>
---
Changes in v2:
- Introduce this patch to fix a build issue later on.
---
include/linux/surface_aggregator/device.h | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/include/linux/surface_aggregator/device.h b/include/linux/surface_aggregator/device.h
index cc257097eb05..62b38b4487eb 100644
--- a/include/linux/surface_aggregator/device.h
+++ b/include/linux/surface_aggregator/device.h
@@ -177,6 +177,8 @@ struct ssam_device_driver {
void (*remove)(struct ssam_device *sdev);
};
+#ifdef CONFIG_SURFACE_AGGREGATOR_BUS
+
extern struct bus_type ssam_bus_type;
extern const struct device_type ssam_device_type;
@@ -193,6 +195,15 @@ static inline bool is_ssam_device(struct device *d)
return d->type == &ssam_device_type;
}
+#else /* CONFIG_SURFACE_AGGREGATOR_BUS */
+
+static inline bool is_ssam_device(struct device *d)
+{
+ return false;
+}
+
+#endif /* CONFIG_SURFACE_AGGREGATOR_BUS */
+
/**
* to_ssam_device() - Casts the given device to a SSAM client device.
* @d: The device to cast.
--
2.36.1
