The bus_info or a similar field exists in a lot of structs, yet drivers
tend to set the value of that field by themselves in a determinable way.
Thus provide a helper for doing this. To be used in subsequent patches.
Signed-off-by: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx>
---
include/media/media-device.h | 28 +++++++++++++++++++++++++---
1 file changed, 25 insertions(+), 3 deletions(-)
diff --git a/include/media/media-device.h b/include/media/media-device.h
index 1345e6da688a..54f0c12bc682 100644
--- a/include/media/media-device.h
+++ b/include/media/media-device.h
@@ -13,12 +13,13 @@
#include <linux/list.h>
#include <linux/mutex.h>
+#include <linux/pci.h>
+#include <linux/platform_device.h>
#include <media/media-devnode.h>
#include <media/media-entity.h>
struct ida;
-struct device;
struct media_device;
/**
@@ -181,8 +182,7 @@ struct media_device {
atomic_t request_id;
};
-/* We don't need to include pci.h or usb.h here */
-struct pci_dev;
+/* We don't need to include usb.h here */
struct usb_device;
#ifdef CONFIG_MEDIA_CONTROLLER
@@ -496,4 +496,26 @@ static inline void __media_device_usb_init(struct media_device *mdev,
#define media_device_usb_init(mdev, udev, name) \
__media_device_usb_init(mdev, udev, name, KBUILD_MODNAME)
+
+/**
+ * media_set_bus_info() - Conditionally set bus_info
+ *
+ * @bus_info: Variable where to write the bus info (char array)
+ * @bus_info_size: Length of the bus_info
+ * @dev: Related struct device
+ *
+ * Sets bus information based on &dev. This is currently done for PCI and
+ * platform devices. dev is required to be non-NULL for this to happen.
+ */
+static inline void
+media_set_bus_info(char *bus_info, size_t bus_info_size, struct device *dev)
+{
+ if (!dev)
+ strscpy(bus_info, "no bus info", bus_info_size);
+ else if (dev_is_platform(dev))
+ snprintf(bus_info, bus_info_size, "platform:%s", dev_name(dev));
+ else if (dev_is_pci(dev))
+ snprintf(bus_info, bus_info_size, "PCI:%s", dev_name(dev));
+}
+
#endif
--
2.30.2
