[PATCH v4 01/23] clk: mediatek: mt8192: Correctly unregister and free clocks on failure
From: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Date: 2023-01-20 09:21:21
Also in:
linux-clk, linux-devicetree, linux-mediatek, lkml
Subsystem:
common clk framework, the rest · Maintainers:
Michael Turquette, Stephen Boyd, Linus Torvalds
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@collabora.com>
Reviewed-by: Chen-Yu Tsai <wenst@chromium.org>
Reviewed-by: Markus Schneider-Pargmann <msp@baylibre.com>
Tested-by: Miles Chen <redacted>
---
drivers/clk/mediatek/clk-mt8192.c | 77 ++++++++++++++++++++++++-------
1 file changed, 60 insertions(+), 17 deletions(-)
diff --git a/drivers/clk/mediatek/clk-mt8192.c b/drivers/clk/mediatek/clk-mt8192.c
index 0e88588b2c49..5196a366dd55 100644
--- a/drivers/clk/mediatek/clk-mt8192.c
+++ b/drivers/clk/mediatek/clk-mt8192.c@@ -1100,27 +1100,64 @@ 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, + r = of_clk_add_hw_provider(node, of_clk_hw_onecell_get, top_clk_data); + if (r) + goto unregister_gates; + + return 0; + +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 +1176,16 @@ 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 +1207,12 @@ 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 +1235,12 @@ 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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