4.19-stable review patch. If anyone has any objections, please let me know.
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From: Yang Yingliang yangyingliang@huawei.com
[ Upstream commit 8f773bfbdd428819328a2d185976cfc6ae811cd3 ]
This driver calls pinctrl_register_and_init() which is not devm_ managed, it will leads memory leak if pinctrl_enable() fails. Replace it with devm_pinctrl_register_and_init(). And call pcs_free_resources() if pinctrl_enable() fails.
Fixes: 5038a66dad01 ("pinctrl: core: delete incorrect free in pinctrl_enable()") Signed-off-by: Yang Yingliang yangyingliang@huawei.com Reviewed-by: Dan Carpenter dan.carpenter@linaro.org Link: https://lore.kernel.org/r/20240606023704.3931561-3-yangyingliang@huawei.com Signed-off-by: Linus Walleij linus.walleij@linaro.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/pinctrl/pinctrl-single.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/drivers/pinctrl/pinctrl-single.c b/drivers/pinctrl/pinctrl-single.c index 4143cafbf7e73..3699843e9a6e8 100644 --- a/drivers/pinctrl/pinctrl-single.c +++ b/drivers/pinctrl/pinctrl-single.c @@ -1311,7 +1311,6 @@ static void pcs_irq_free(struct pcs_device *pcs) static void pcs_free_resources(struct pcs_device *pcs) { pcs_irq_free(pcs); - pinctrl_unregister(pcs->pctl);
#if IS_BUILTIN(CONFIG_PINCTRL_SINGLE) if (pcs->missing_nr_pinctrl_cells) @@ -1864,7 +1863,7 @@ static int pcs_probe(struct platform_device *pdev) if (ret < 0) goto free;
- ret = pinctrl_register_and_init(&pcs->desc, pcs->dev, pcs, &pcs->pctl); + ret = devm_pinctrl_register_and_init(pcs->dev, &pcs->desc, pcs, &pcs->pctl); if (ret) { dev_err(pcs->dev, "could not register single pinctrl driver\n"); goto free; @@ -1897,8 +1896,10 @@ static int pcs_probe(struct platform_device *pdev)
dev_info(pcs->dev, "%i pins, size %u\n", pcs->desc.npins, pcs->size);
- return pinctrl_enable(pcs->pctl); + if (pinctrl_enable(pcs->pctl)) + goto free;
+ return 0; free: pcs_free_resources(pcs);