Some types of fwnode_handle do not implement the device_is_available()
check, such as those created by software_nodes. There isn't really a
meaningful way to check for the availability of a device that doesn't
actually exist, so if the check isn't implemented just assume that the
"device" is present.
Suggested-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
Signed-off-by: Daniel Scally <djrscally@xxxxxxxxx>
---
Changes since RFC v3:
patch introduced
drivers/base/property.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/base/property.c b/drivers/base/property.c
index 4c43d30145c6..a5ca2306796f 100644
--- a/drivers/base/property.c
+++ b/drivers/base/property.c
@@ -785,9 +785,14 @@ EXPORT_SYMBOL_GPL(fwnode_handle_put);
/**
* fwnode_device_is_available - check if a device is available for use
* @fwnode: Pointer to the fwnode of the device.
+ *
+ * For fwnode node types that don't implement the .device_is_available()
+ * operation, this function returns true.
*/
bool fwnode_device_is_available(const struct fwnode_handle *fwnode)
{
+ if (!fwnode_has_op(fwnode, device_is_available))
+ return true;
return fwnode_call_bool_op(fwnode, device_is_available);
}
EXPORT_SYMBOL_GPL(fwnode_device_is_available);
--
2.25.1
