6.11-stable review patch. If anyone has any objections, please let me know.
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From: Fabrizio Castro fabrizio.castro.jz@renesas.com
[ Upstream commit d038109ac1c6bf619473dda03a16a6de58170f7f ]
rzg2l_irqc_common_init() calls of_find_device_by_node(), but the corresponding put_device() call is missing. This also gets reported by make coccicheck.
Make use of the cleanup interfaces from cleanup.h to call into __free_put_device(), which in turn calls into put_device when leaving function rzg2l_irqc_common_init() and variable "dev" goes out of scope.
To prevent that the device is put on successful completion, assign NULL to "dev" to prevent __free_put_device() from calling into put_device() within the successful path.
"make coccicheck" will still complain about missing put_device() calls, but those are false positives now.
Fixes: 3fed09559cd8 ("irqchip: Add RZ/G2L IA55 Interrupt Controller driver") Signed-off-by: Fabrizio Castro fabrizio.castro.jz@renesas.com Signed-off-by: Thomas Gleixner tglx@linutronix.de Link: https://lore.kernel.org/all/20241011172003.1242841-1-fabrizio.castro.jz@rene... Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/irqchip/irq-renesas-rzg2l.c | 16 ++++++++++++++-- 1 file changed, 14 insertions(+), 2 deletions(-)
diff --git a/drivers/irqchip/irq-renesas-rzg2l.c b/drivers/irqchip/irq-renesas-rzg2l.c index 693ff285ca2c6..99e27e01b0b19 100644 --- a/drivers/irqchip/irq-renesas-rzg2l.c +++ b/drivers/irqchip/irq-renesas-rzg2l.c @@ -8,6 +8,7 @@ */
#include <linux/bitfield.h> +#include <linux/cleanup.h> #include <linux/clk.h> #include <linux/err.h> #include <linux/io.h> @@ -530,12 +531,12 @@ static int rzg2l_irqc_parse_interrupts(struct rzg2l_irqc_priv *priv, static int rzg2l_irqc_common_init(struct device_node *node, struct device_node *parent, const struct irq_chip *irq_chip) { + struct platform_device *pdev = of_find_device_by_node(node); + struct device *dev __free(put_device) = pdev ? &pdev->dev : NULL; struct irq_domain *irq_domain, *parent_domain; - struct platform_device *pdev; struct reset_control *resetn; int ret;
- pdev = of_find_device_by_node(node); if (!pdev) return -ENODEV;
@@ -591,6 +592,17 @@ static int rzg2l_irqc_common_init(struct device_node *node, struct device_node *
register_syscore_ops(&rzg2l_irqc_syscore_ops);
+ /* + * Prevent the cleanup function from invoking put_device by assigning + * NULL to dev. + * + * make coccicheck will complain about missing put_device calls, but + * those are false positives, as dev will be automatically "put" via + * __free_put_device on the failing path. + * On the successful path we don't actually want to "put" dev. + */ + dev = NULL; + return 0;
pm_put: