[PATCH 1/5] i3c: master: Release the fwnode of i2c boardinfo

[Akhil R]

i3c_master_add_i2c_boardinfo() takes a reference on the firmware node of
every i2c child described for the bus, but nothing ever drops it. The i2c
core takes a reference of its own for the client that it creates, so this
one is never consumed. The nodes stay pinned for as long as the system
runs, and more references are leaked on every rebind of the controller
driver and on every failed probe.

Drop the reference with a device managed action on the controller device,
next to where it is taken.

Fixes: 3a379bbcea0a ("i3c: Add core I3C infrastructure")
Reported-by: Adrian Hunter <adrian.hunter at intel.com>
Closes: https://lore.kernel.org/all/97465893-3650-4f37-98b7-1db76fc6fd03@intel.com/
Assisted-by: Cursor:claude-opus-5
Signed-off-by: Akhil R <akhilrajeev at nvidia.com>
---
 drivers/i3c/master.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/i3c/master.c b/drivers/i3c/master.c
index f485b98805cf..08dc10f172aa 100644
--- a/drivers/i3c/master.c
+++ b/drivers/i3c/master.c
@@ -2871,6 +2871,11 @@ static inline int i3c_acpi_add_i2c_boardinfo(struct i2c_dev_boardinfo *boardinfo
 }
 #endif
 
+static void i3c_master_put_boardinfo_fwnode(void *fwnode)
+{
+	fwnode_handle_put(fwnode);
+}
+
 static int
 i3c_master_add_i2c_boardinfo(struct i3c_master_controller *master,
 			     struct fwnode_handle *fwnode, u32 *reg)
@@ -2913,7 +2918,8 @@ i3c_master_add_i2c_boardinfo(struct i3c_master_controller *master,
 	list_add_tail(&boardinfo->node, &master->boardinfo.i2c);
 	fwnode_handle_get(fwnode);
 
-	return 0;
+	return devm_add_action_or_reset(dev, i3c_master_put_boardinfo_fwnode,
+					fwnode);
 }
 
 static int
-- 
2.43.0