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From:   Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
To:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        "Rafael J. Wysocki" <rafael@kernel.org>
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        Laurentiu Tudor <laurentiu.tudor@nxp.com>,
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        Linus Torvalds <torvalds@linux-foundation.org>,
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        Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>,
        stable@vger.kernel.org
Subject: [PATCH v4 09/11] clk: imx: scu: Fix kfree() of static memory on setting driver_override
Date:   Sat, 12 Mar 2022 14:28:54 +0100
Message-Id: <20220312132856.65163-10-krzysztof.kozlowski@canonical.com>
In-Reply-To: <20220312132856.65163-1-krzysztof.kozlowski@canonical.com>
References: <20220312132856.65163-1-krzysztof.kozlowski@canonical.com>
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The driver_override field from platform driver should not be initialized
from static memory (string literal) because the core later kfree() it,
for example when driver_override is set via sysfs.

Use dedicated helper to set driver_override properly.

Fixes: 77d8f3068c63 ("clk: imx: scu: add two cells binding support")
Cc: <stable@vger.kernel.org>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
---
 drivers/clk/imx/clk-scu.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/clk/imx/clk-scu.c b/drivers/clk/imx/clk-scu.c
index 083da31dc3ea..4b2268b7d0d0 100644
--- a/drivers/clk/imx/clk-scu.c
+++ b/drivers/clk/imx/clk-scu.c
@@ -683,7 +683,12 @@ struct clk_hw *imx_clk_scu_alloc_dev(const char *name,
 		return ERR_PTR(ret);
 	}
 
-	pdev->driver_override = "imx-scu-clk";
+	ret = driver_set_override(&pdev->dev, &pdev->driver_override,
+				  "imx-scu-clk", strlen("imx-scu-clk"));
+	if (ret) {
+		platform_device_put(pdev);
+		return ERR_PTR(ret);
+	}
 
 	ret = imx_clk_scu_attach_pd(&pdev->dev, rsrc_id);
 	if (ret)
-- 
2.32.0