From: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxxxxx> commit 50ebd19e3585b9792e994cfa8cbee8947fe06371 upstream. The driver iterates over its devicetree children with for_each_child_of_node() and stores for later found node pointer. This has to be put in error paths to avoid leak during re-probing. Fixes: ab663789d697 ("pinctrl: samsung: Match pin banks with their device nodes") Cc: <stable@xxxxxxxxxxxxxxx> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxxxxx> Reviewed-by: Sam Protsenko <semen.protsenko@xxxxxxxxxx> Reviewed-by: Chanho Park <chanho61.park@xxxxxxxxxxx> Link: https://lore.kernel.org/r/20220111201426.326777-2-krzysztof.kozlowski@xxxxxxxxxxxxx Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/pinctrl/samsung/pinctrl-samsung.c | 30 +++++++++++++++++++++++------- 1 file changed, 23 insertions(+), 7 deletions(-) --- a/drivers/pinctrl/samsung/pinctrl-samsung.c +++ b/drivers/pinctrl/samsung/pinctrl-samsung.c @@ -975,6 +975,16 @@ samsung_pinctrl_get_soc_data_for_of_alia return &(of_data->ctrl[id]); } +static void samsung_banks_of_node_put(struct samsung_pinctrl_drv_data *d) +{ + struct samsung_pin_bank *bank; + unsigned int i; + + bank = d->pin_banks; + for (i = 0; i < d->nr_banks; ++i, ++bank) + of_node_put(bank->of_node); +} + /* retrieve the soc specific data */ static const struct samsung_pin_ctrl * samsung_pinctrl_get_soc_data(struct samsung_pinctrl_drv_data *d, @@ -1089,19 +1099,19 @@ static int samsung_pinctrl_probe(struct if (ctrl->retention_data) { drvdata->retention_ctrl = ctrl->retention_data->init(drvdata, ctrl->retention_data); - if (IS_ERR(drvdata->retention_ctrl)) - return PTR_ERR(drvdata->retention_ctrl); + if (IS_ERR(drvdata->retention_ctrl)) { + ret = PTR_ERR(drvdata->retention_ctrl); + goto err_put_banks; + } } ret = samsung_pinctrl_register(pdev, drvdata); if (ret) - return ret; + goto err_put_banks; ret = samsung_gpiolib_register(pdev, drvdata); - if (ret) { - samsung_pinctrl_unregister(pdev, drvdata); - return ret; - } + if (ret) + goto err_unregister; if (ctrl->eint_gpio_init) ctrl->eint_gpio_init(drvdata); @@ -1111,6 +1121,12 @@ static int samsung_pinctrl_probe(struct platform_set_drvdata(pdev, drvdata); return 0; + +err_unregister: + samsung_pinctrl_unregister(pdev, drvdata); +err_put_banks: + samsung_banks_of_node_put(drvdata); + return ret; } /** Patches currently in stable-queue which might be from krzysztof.kozlowski@xxxxxxxxxxxxx are queue-4.14/pinctrl-samsung-drop-pin-banks-references-on-error-paths.patch