6.17-stable review patch. If anyone has any objections, please let me know.
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From: Bastien Curutchet bastien.curutchet@bootlin.com
[ Upstream commit 5f4bbee069836e51ed0b6d7e565a292f070ababc ]
When an MFD device is added, a platform_device is allocated. If this device is linked to a DT description, the corresponding OF node is linked to the new platform device but the OF node's refcount isn't incremented. As of_node_put() is called during the platform device release, it leads to a refcount underflow.
Call of_node_get() to increment the OF node's refcount when the node is linked to the newly created platform device.
Signed-off-by: Bastien Curutchet bastien.curutchet@bootlin.com Link: https://lore.kernel.org/r/20250820-mfd-refcount-v1-1-6dcb5eb41756@bootlin.co... Signed-off-by: Lee Jones lee@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/mfd/mfd-core.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/drivers/mfd/mfd-core.c b/drivers/mfd/mfd-core.c index 76bd316a50afc..7d14a1e7631ee 100644 --- a/drivers/mfd/mfd-core.c +++ b/drivers/mfd/mfd-core.c @@ -131,6 +131,7 @@ static int mfd_match_of_node_to_dev(struct platform_device *pdev, of_entry->np = np; list_add_tail(&of_entry->list, &mfd_of_node_list);
+ of_node_get(np); device_set_node(&pdev->dev, of_fwnode_handle(np)); #endif return 0;