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[14.13.71.96]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-37fd2bd0e49sm3919763a91.0.2026.06.29.07.24.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 29 Jun 2026 07:24:12 -0700 (PDT) From: Akari Tsuyukusa To: Michael Turquette , Stephen Boyd , Brian Masney , Matthias Brugger , AngeloGioacchino Del Regno , Chen-Yu Tsai , Miles Chen Cc: Akari Tsuyukusa , linux-clk@vger.kernel.org (open list:COMMON CLK FRAMEWORK), linux-kernel@vger.kernel.org (open list:ARM/Mediatek SoC support), linux-arm-kernel@lists.infradead.org (moderated list:ARM/Mediatek SoC support), linux-mediatek@lists.infradead.org (moderated list:ARM/Mediatek SoC support) Subject: [PATCH] clk: mediatek: fix memory leak on module removal Date: Mon, 29 Jun 2026 23:23:40 +0900 Message-ID: <20260629142348.273766-1-akkun11.open@gmail.com> X-Mailer: git-send-email 2.54.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260629_072414_311309_5E496E18 X-CRM114-Status: GOOD ( 11.88 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Some MediaTek clock drivers do not call platform_set_drvdata() during probe(), but their remove() callback calls platform_get_drvdata(). This results in platform_get_drvdata() returning NULL, which leads to calling mtk_free_clk_data(NULL) -> kfree(NULL). Therefore, the actual clk_data is never released, causing a memory leak. Fix this by calling platform_set_drvdata() during probe. Fixes: 124294ff468f ("clk: mediatek: mt8192: Move apmixedsys clock driver to its own file") Fixes: 4c02c9af3cb9 ("clk: mediatek: mt8173: Break down clock drivers and allow module build") Fixes: 54b7026f011e ("clk: mediatek: mt8135-apmixedsys: Convert to platform_driver and module") Fixes: c50e2ea6507b ("clk: mediatek: mt7622-apmixedsys: Add .remove() callback for module build") Fixes: 0d363282bb0c ("clk: mediatek: Add MediaTek Helio X10 MT6795 clock drivers") Fixes: c6368ce86435 ("clk: mediatek: mt2712-apmixedsys: Add .remove() callback for module build") Fixes: 838b86331c5e ("clk: mediatek: mt7622: Move infracfg to clk-mt7622-infracfg.c") Signed-off-by: Akari Tsuyukusa --- drivers/clk/mediatek/clk-mt2712-apmixedsys.c | 1 + drivers/clk/mediatek/clk-mt6795-apmixedsys.c | 1 + drivers/clk/mediatek/clk-mt6795-infracfg.c | 1 + drivers/clk/mediatek/clk-mt6795-pericfg.c | 1 + drivers/clk/mediatek/clk-mt7622-apmixedsys.c | 1 + drivers/clk/mediatek/clk-mt7622-infracfg.c | 1 + drivers/clk/mediatek/clk-mt8135-apmixedsys.c | 1 + drivers/clk/mediatek/clk-mt8173-apmixedsys.c | 1 + drivers/clk/mediatek/clk-mt8173-infracfg.c | 1 + drivers/clk/mediatek/clk-mt8192-apmixedsys.c | 1 + 10 files changed, 10 insertions(+) diff --git a/drivers/clk/mediatek/clk-mt2712-apmixedsys.c b/drivers/clk/mediatek/clk-mt2712-apmixedsys.c index 54b18e9f83f8..24522fc24019 100644 --- a/drivers/clk/mediatek/clk-mt2712-apmixedsys.c +++ b/drivers/clk/mediatek/clk-mt2712-apmixedsys.c @@ -129,6 +129,7 @@ static int clk_mt2712_apmixed_probe(struct platform_device *pdev) goto unregister_plls; } + platform_set_drvdata(pdev, clk_data); return 0; unregister_plls: diff --git a/drivers/clk/mediatek/clk-mt6795-apmixedsys.c b/drivers/clk/mediatek/clk-mt6795-apmixedsys.c index 123d5d7fea85..b607592a7c37 100644 --- a/drivers/clk/mediatek/clk-mt6795-apmixedsys.c +++ b/drivers/clk/mediatek/clk-mt6795-apmixedsys.c @@ -175,6 +175,7 @@ static int clk_mt6795_apmixed_probe(struct platform_device *pdev) dev_dbg(dev, "Performing initial setup for MD1\n"); clk_mt6795_apmixed_setup_md1(base); + platform_set_drvdata(pdev, clk_data); return 0; unregister_ref2usb: diff --git a/drivers/clk/mediatek/clk-mt6795-infracfg.c b/drivers/clk/mediatek/clk-mt6795-infracfg.c index e4559569f5b0..12146bb3b726 100644 --- a/drivers/clk/mediatek/clk-mt6795-infracfg.c +++ b/drivers/clk/mediatek/clk-mt6795-infracfg.c @@ -116,6 +116,7 @@ static int clk_mt6795_infracfg_probe(struct platform_device *pdev) if (ret) goto unregister_cpumuxes; + platform_set_drvdata(pdev, clk_data); return 0; unregister_cpumuxes: diff --git a/drivers/clk/mediatek/clk-mt6795-pericfg.c b/drivers/clk/mediatek/clk-mt6795-pericfg.c index d48240eb2a67..28faeb2e657a 100644 --- a/drivers/clk/mediatek/clk-mt6795-pericfg.c +++ b/drivers/clk/mediatek/clk-mt6795-pericfg.c @@ -125,6 +125,7 @@ static int clk_mt6795_pericfg_probe(struct platform_device *pdev) if (ret) goto unregister_composites; + platform_set_drvdata(pdev, clk_data); return 0; unregister_composites: diff --git a/drivers/clk/mediatek/clk-mt7622-apmixedsys.c b/drivers/clk/mediatek/clk-mt7622-apmixedsys.c index 8a29eaab0cfc..a9fc2e5536b3 100644 --- a/drivers/clk/mediatek/clk-mt7622-apmixedsys.c +++ b/drivers/clk/mediatek/clk-mt7622-apmixedsys.c @@ -109,6 +109,7 @@ static int clk_mt7622_apmixed_probe(struct platform_device *pdev) if (ret) goto unregister_gates; + platform_set_drvdata(pdev, clk_data); return 0; unregister_gates: diff --git a/drivers/clk/mediatek/clk-mt7622-infracfg.c b/drivers/clk/mediatek/clk-mt7622-infracfg.c index cfdf3b07c3e0..b44baf521d2f 100644 --- a/drivers/clk/mediatek/clk-mt7622-infracfg.c +++ b/drivers/clk/mediatek/clk-mt7622-infracfg.c @@ -90,6 +90,7 @@ static int clk_mt7622_infracfg_probe(struct platform_device *pdev) if (ret) goto unregister_cpumuxes; + platform_set_drvdata(pdev, clk_data); return 0; unregister_cpumuxes: diff --git a/drivers/clk/mediatek/clk-mt8135-apmixedsys.c b/drivers/clk/mediatek/clk-mt8135-apmixedsys.c index 19e4ee489ec3..41e5cfbcbb76 100644 --- a/drivers/clk/mediatek/clk-mt8135-apmixedsys.c +++ b/drivers/clk/mediatek/clk-mt8135-apmixedsys.c @@ -66,6 +66,7 @@ static int clk_mt8135_apmixed_probe(struct platform_device *pdev) if (ret) goto unregister_plls; + platform_set_drvdata(pdev, clk_data); return 0; unregister_plls: diff --git a/drivers/clk/mediatek/clk-mt8173-apmixedsys.c b/drivers/clk/mediatek/clk-mt8173-apmixedsys.c index d7d416172ab3..fe36d2eac3da 100644 --- a/drivers/clk/mediatek/clk-mt8173-apmixedsys.c +++ b/drivers/clk/mediatek/clk-mt8173-apmixedsys.c @@ -179,6 +179,7 @@ static int clk_mt8173_apmixed_probe(struct platform_device *pdev) if (r) goto unregister_ref2usb; + platform_set_drvdata(pdev, clk_data); return 0; unregister_ref2usb: diff --git a/drivers/clk/mediatek/clk-mt8173-infracfg.c b/drivers/clk/mediatek/clk-mt8173-infracfg.c index fa2d1d557e04..b923b73c64f6 100644 --- a/drivers/clk/mediatek/clk-mt8173-infracfg.c +++ b/drivers/clk/mediatek/clk-mt8173-infracfg.c @@ -128,6 +128,7 @@ static int clk_mt8173_infracfg_probe(struct platform_device *pdev) if (r) goto unregister_clk_hw; + platform_set_drvdata(pdev, clk_data); return 0; unregister_clk_hw: diff --git a/drivers/clk/mediatek/clk-mt8192-apmixedsys.c b/drivers/clk/mediatek/clk-mt8192-apmixedsys.c index b0563a285bd6..446c55b77777 100644 --- a/drivers/clk/mediatek/clk-mt8192-apmixedsys.c +++ b/drivers/clk/mediatek/clk-mt8192-apmixedsys.c @@ -176,6 +176,7 @@ static int clk_mt8192_apmixed_probe(struct platform_device *pdev) if (r) goto unregister_gates; + platform_set_drvdata(pdev, clk_data); return r; unregister_gates: -- 2.54.0