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Date: Fri, 23 Dec 2022 10:42:37 +0100
From: AngeloGioacchino Del Regno
<angelogioacchino.delregno@...labora.com>
To: mturquette@...libre.com
Cc: sboyd@...nel.org, matthias.bgg@...il.com, robh+dt@...nel.org,
krzysztof.kozlowski+dt@...aro.org,
angelogioacchino.delregno@...labora.com, wenst@...omium.org,
johnson.wang@...iatek.com, miles.chen@...iatek.com,
fparent@...libre.com, chun-jie.chen@...iatek.com,
sam.shih@...iatek.com, y.oudjana@...tonmail.com,
nfraprado@...labora.com, rex-bc.chen@...iatek.com,
ryder.lee@...nel.org, daniel@...rotopia.org,
jose.exposito89@...il.com, yangyingliang@...wei.com,
pablo.sun@...iatek.com, msp@...libre.com, weiyi.lu@...iatek.com,
ikjn@...omium.org, linux-kernel@...r.kernel.org,
linux-clk@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
linux-mediatek@...ts.infradead.org, devicetree@...r.kernel.org,
kernel@...labora.com
Subject: [PATCH v2 01/23] clk: mediatek: mt8192: Correctly unregister and free clocks on failure
If anything fails during probe of the clock controller(s), unregister
(and kfree!) whatever we have previously registered to leave with a
clean state and prevent leaks.
Fixes: 710573dee31b ("clk: mediatek: Add MT8192 basic clocks support")
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
---
drivers/clk/mediatek/clk-mt8192.c | 72 ++++++++++++++++++++++++-------
1 file changed, 56 insertions(+), 16 deletions(-)
diff --git a/drivers/clk/mediatek/clk-mt8192.c b/drivers/clk/mediatek/clk-mt8192.c
index 0e88588b2c49..eff66ca6c6a7 100644
--- a/drivers/clk/mediatek/clk-mt8192.c
+++ b/drivers/clk/mediatek/clk-mt8192.c
@@ -1100,27 +1100,61 @@ static int clk_mt8192_top_probe(struct platform_device *pdev)
if (IS_ERR(base))
return PTR_ERR(base);
- mtk_clk_register_fixed_clks(top_fixed_clks, ARRAY_SIZE(top_fixed_clks), top_clk_data);
- mtk_clk_register_factors(top_early_divs, ARRAY_SIZE(top_early_divs), top_clk_data);
- mtk_clk_register_factors(top_divs, ARRAY_SIZE(top_divs), top_clk_data);
- mtk_clk_register_muxes(top_mtk_muxes, ARRAY_SIZE(top_mtk_muxes), node, &mt8192_clk_lock,
- top_clk_data);
- mtk_clk_register_composites(top_muxes, ARRAY_SIZE(top_muxes), base, &mt8192_clk_lock,
- top_clk_data);
- mtk_clk_register_composites(top_adj_divs, ARRAY_SIZE(top_adj_divs), base, &mt8192_clk_lock,
- top_clk_data);
- r = mtk_clk_register_gates(node, top_clks, ARRAY_SIZE(top_clks), top_clk_data);
+ r = mtk_clk_register_fixed_clks(top_fixed_clks, ARRAY_SIZE(top_fixed_clks), top_clk_data);
if (r)
return r;
+ r = mtk_clk_register_factors(top_early_divs, ARRAY_SIZE(top_early_divs), top_clk_data);
+ if (r)
+ goto unregister_fixed_clks;
+
+ r = mtk_clk_register_factors(top_divs, ARRAY_SIZE(top_divs), top_clk_data);
+ if (r)
+ goto unregister_early_factors;
+
+ r = mtk_clk_register_muxes(top_mtk_muxes, ARRAY_SIZE(top_mtk_muxes), node,
+ &mt8192_clk_lock, top_clk_data);
+ if (r)
+ goto unregister_factors;
+
+ r = mtk_clk_register_composites(top_muxes, ARRAY_SIZE(top_muxes), base,
+ &mt8192_clk_lock, top_clk_data);
+ if (r)
+ goto unregister_muxes;
+
+ r = mtk_clk_register_composites(top_adj_divs, ARRAY_SIZE(top_adj_divs), base,
+ &mt8192_clk_lock, top_clk_data);
+ if (r)
+ goto unregister_top_composites;
+
+ r = mtk_clk_register_gates(node, top_clks, ARRAY_SIZE(top_clks), top_clk_data);
+ if (r)
+ goto unregister_adj_divs_composites;
+
r = clk_mt8192_reg_mfg_mux_notifier(&pdev->dev,
top_clk_data->hws[CLK_TOP_MFG_PLL_SEL]->clk);
if (r)
- return r;
-
+ goto unregister_gates;
return of_clk_add_hw_provider(node, of_clk_hw_onecell_get,
top_clk_data);
+
+unregister_gates:
+ mtk_clk_unregister_gates(top_clks, ARRAY_SIZE(top_clks), top_clk_data);
+unregister_adj_divs_composites:
+ mtk_clk_unregister_composites(top_adj_divs, ARRAY_SIZE(top_adj_divs), top_clk_data);
+unregister_top_composites:
+ mtk_clk_unregister_composites(top_muxes, ARRAY_SIZE(top_muxes), top_clk_data);
+unregister_muxes:
+ mtk_clk_unregister_muxes(top_mtk_muxes, ARRAY_SIZE(top_mtk_muxes), top_clk_data);
+unregister_factors:
+ mtk_clk_unregister_factors(top_divs, ARRAY_SIZE(top_divs), top_clk_data);
+unregister_early_factors:
+ mtk_clk_unregister_factors(top_early_divs, ARRAY_SIZE(top_early_divs), top_clk_data);
+unregister_fixed_clks:
+ mtk_clk_unregister_fixed_clks(top_fixed_clks, ARRAY_SIZE(top_fixed_clks),
+ top_clk_data);
+ return r;
}
static int clk_mt8192_infra_probe(struct platform_device *pdev)
@@ -1139,14 +1173,16 @@ static int clk_mt8192_infra_probe(struct platform_device *pdev)
r = mtk_register_reset_controller_with_dev(&pdev->dev, &clk_rst_desc);
if (r)
- goto free_clk_data;
+ goto unregister_gates;
r = of_clk_add_hw_provider(node, of_clk_hw_onecell_get, clk_data);
if (r)
- goto free_clk_data;
+ goto unregister_gates;
return r;
+unregister_gates:
+ mtk_clk_unregister_gates(infra_clks, ARRAY_SIZE(infra_clks), clk_data);
free_clk_data:
mtk_free_clk_data(clk_data);
return r;
@@ -1168,10 +1204,12 @@ static int clk_mt8192_peri_probe(struct platform_device *pdev)
r = of_clk_add_hw_provider(node, of_clk_hw_onecell_get, clk_data);
if (r)
- goto free_clk_data;
+ goto unregister_gates;
return r;
+unregister_gates:
+ mtk_clk_unregister_gates(peri_clks, ARRAY_SIZE(peri_clks), clk_data);
free_clk_data:
mtk_free_clk_data(clk_data);
return r;
@@ -1194,10 +1232,12 @@ static int clk_mt8192_apmixed_probe(struct platform_device *pdev)
r = of_clk_add_hw_provider(node, of_clk_hw_onecell_get, clk_data);
if (r)
- goto free_clk_data;
+ goto unregister_gates;
return r;
+unregister_gates:
+ mtk_clk_unregister_gates(apmixed_clks, ARRAY_SIZE(apmixed_clks), clk_data);
free_clk_data:
mtk_free_clk_data(clk_data);
return r;
--
2.39.0
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