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From:   Daniel Scally <djrscally@gmail.com>
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        Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Subject: [PATCH 01/18] property: Return true in fwnode_device_is_available for node types that do not implement this operation
Date:   Mon, 30 Nov 2020 13:31:12 +0000
Message-Id: <20201130133129.1024662-2-djrscally@gmail.com>
In-Reply-To: <20201130133129.1024662-1-djrscally@gmail.com>
References: <20201130133129.1024662-1-djrscally@gmail.com>
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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@ideasonboard.com>
Signed-off-by: Daniel Scally <djrscally@gmail.com>
---
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