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Date: Wed, 29 May 2019 20:03:26 -0700 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-kernel@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, stable@...r.kernel.org, Wen Yang <wen.yang99@....com.cn>, Patrice Chotard <patrice.chotard@...com>, Linus Walleij <linus.walleij@...aro.org>, linux-gpio@...r.kernel.org, Sasha Levin <sashal@...nel.org> Subject: [PATCH 5.0 133/346] pinctrl: st: fix leaked of_node references [ Upstream commit 483d70d73beaecab55882fcd2a357af72674e24c ] The call to of_get_child_by_name returns a node pointer with refcount incremented thus it must be explicitly decremented after the last usage. Detected by coccinelle with the following warnings: ./drivers/pinctrl/pinctrl-st.c:1188:3-9: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 1175, but without a corresponding object release within this function. ./drivers/pinctrl/pinctrl-st.c:1188:3-9: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 1175, but without a corresponding object release within this function. ./drivers/pinctrl/pinctrl-st.c:1199:2-8: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 1175, but without a corresponding object release within this function. ./drivers/pinctrl/pinctrl-st.c:1199:2-8: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 1175, but without a corresponding object release within this function. Signed-off-by: Wen Yang <wen.yang99@....com.cn> Cc: Patrice Chotard <patrice.chotard@...com> Cc: Linus Walleij <linus.walleij@...aro.org> Cc: linux-gpio@...r.kernel.org Cc: linux-kernel@...r.kernel.org (open list) Reviewed-by: Patrice Chotard <patrice.chotard@...com> Signed-off-by: Linus Walleij <linus.walleij@...aro.org> Signed-off-by: Sasha Levin <sashal@...nel.org> --- drivers/pinctrl/pinctrl-st.c | 15 ++++++++++----- 1 file changed, 10 insertions(+), 5 deletions(-) diff --git a/drivers/pinctrl/pinctrl-st.c b/drivers/pinctrl/pinctrl-st.c index e66af93f2cbf8..195b442a23434 100644 --- a/drivers/pinctrl/pinctrl-st.c +++ b/drivers/pinctrl/pinctrl-st.c @@ -1170,7 +1170,7 @@ static int st_pctl_dt_parse_groups(struct device_node *np, struct property *pp; struct st_pinconf *conf; struct device_node *pins; - int i = 0, npins = 0, nr_props; + int i = 0, npins = 0, nr_props, ret = 0; pins = of_get_child_by_name(np, "st,pins"); if (!pins) @@ -1185,7 +1185,8 @@ static int st_pctl_dt_parse_groups(struct device_node *np, npins++; } else { pr_warn("Invalid st,pins in %pOFn node\n", np); - return -EINVAL; + ret = -EINVAL; + goto out_put_node; } } @@ -1195,8 +1196,10 @@ static int st_pctl_dt_parse_groups(struct device_node *np, grp->pin_conf = devm_kcalloc(info->dev, npins, sizeof(*conf), GFP_KERNEL); - if (!grp->pins || !grp->pin_conf) - return -ENOMEM; + if (!grp->pins || !grp->pin_conf) { + ret = -ENOMEM; + goto out_put_node; + } /* <bank offset mux direction rt_type rt_delay rt_clk> */ for_each_property_of_node(pins, pp) { @@ -1229,9 +1232,11 @@ static int st_pctl_dt_parse_groups(struct device_node *np, } i++; } + +out_put_node: of_node_put(pins); - return 0; + return ret; } static int st_pctl_parse_functions(struct device_node *np, -- 2.20.1
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