linux-kernel - [PATCH AUTOSEL 5.3 28/81] pinctrl: stmfx: fix null pointer on remove

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Message-Id: <20191030154928.9432-28-sashal@kernel.org>
Date:   Wed, 30 Oct 2019 11:48:34 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Amelie Delaunay <amelie.delaunay@...com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Sasha Levin <sashal@...nel.org>, linux-gpio@...r.kernel.org
Subject: [PATCH AUTOSEL 5.3 28/81] pinctrl: stmfx: fix null pointer on remove

From: Amelie Delaunay <amelie.delaunay@...com>

[ Upstream commit 2fd215b8fdbe4d3a609adbe3a323696393cb1e53 ]

dev_get_platdata(&pdev->dev) returns a pointer on struct stmfx_pinctrl,
not on struct stmfx (platform_set_drvdata(pdev, pctl); in probe).
Pointer on struct stmfx is stored in driver data of pdev parent (in probe:
struct stmfx *stmfx = dev_get_drvdata(pdev->dev.parent);).

Fixes: 1490d9f841b1 ("pinctrl: Add STMFX GPIO expander Pinctrl/GPIO driver")
Signed-off-by: Amelie Delaunay <amelie.delaunay@...com>
Link: https://lore.kernel.org/r/20191004122342.22018-1-amelie.delaunay@st.com
Signed-off-by: Linus Walleij <linus.walleij@...aro.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/pinctrl/pinctrl-stmfx.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/pinctrl/pinctrl-stmfx.c b/drivers/pinctrl/pinctrl-stmfx.c
index 31b6e511670fc..b7c7f24699c96 100644
--- a/drivers/pinctrl/pinctrl-stmfx.c
+++ b/drivers/pinctrl/pinctrl-stmfx.c
@@ -697,7 +697,7 @@ static int stmfx_pinctrl_probe(struct platform_device *pdev)
 
 static int stmfx_pinctrl_remove(struct platform_device *pdev)
 {
-	struct stmfx *stmfx = dev_get_platdata(&pdev->dev);
+	struct stmfx *stmfx = dev_get_drvdata(pdev->dev.parent);
 
 	return stmfx_function_disable(stmfx,
 				      STMFX_FUNC_GPIO |
-- 
2.20.1