6.6-stable review patch. If anyone has any objections, please let me know.
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From: Haotian Zhang vulab@iscas.ac.cn
[ Upstream commit 002679f79ed605e543fbace465557317cd307c9a ]
In stm32_pctl_probe(), hwspin_lock_request_specific() is called to request a hwspinlock, but the acquired lock is not freed on multiple error paths after this call. This causes resource leakage when the function fails to initialize properly.
Use devm_hwspin_lock_request_specific() instead of hwspin_lock_request_specific() to automatically manage the hwspinlock resource lifecycle.
Fixes: 97cfb6cd34f2 ("pinctrl: stm32: protect configuration registers with a hwspinlock") Signed-off-by: Haotian Zhang vulab@iscas.ac.cn Reviewed-by: Antonio Borneo antonio.borneo@foss.st.com Signed-off-by: Linus Walleij linus.walleij@linaro.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/pinctrl/stm32/pinctrl-stm32.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/pinctrl/stm32/pinctrl-stm32.c b/drivers/pinctrl/stm32/pinctrl-stm32.c index 67c2791ee246f..ac96523e07b8d 100644 --- a/drivers/pinctrl/stm32/pinctrl-stm32.c +++ b/drivers/pinctrl/stm32/pinctrl-stm32.c @@ -1550,7 +1550,7 @@ int stm32_pctl_probe(struct platform_device *pdev) if (hwlock_id == -EPROBE_DEFER) return hwlock_id; } else { - pctl->hwlock = hwspin_lock_request_specific(hwlock_id); + pctl->hwlock = devm_hwspin_lock_request_specific(dev, hwlock_id); }
spin_lock_init(&pctl->irqmux_lock);