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Wed, 27 Dec 2023 01:05:05 -0800 (PST) Received: from treapking.tpe.corp.google.com ([2401:fa00:1:10:18d2:7869:e8b9:f4e4]) by smtp.gmail.com with ESMTPSA id v22-20020a056a00149600b006d9b65d1a8esm5347701pfu.28.2023.12.27.01.05.03 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 27 Dec 2023 01:05:05 -0800 (PST) From: Pin-yen Lin To: Michael Turquette , Stephen Boyd , Matthias Brugger , AngeloGioacchino Del Regno Cc: Pin-yen Lin , linux-mediatek@lists.infradead.org, linux-clk@vger.kernel.org, Chen-Yu Tsai , linux-kernel@vger.kernel.org, Weiyi Lu , linux-arm-kernel@lists.infradead.org Subject: [PATCH 2/2] clk: mediatek: mt8183: Enable need_runtime_pm on mt8183-mfgcfg Date: Wed, 27 Dec 2023 17:04:43 +0800 Message-ID: <20231227090448.2216295-2-treapking@chromium.org> X-Mailer: git-send-email 2.43.0.472.g3155946c3a-goog In-Reply-To: <20231227090448.2216295-1-treapking@chromium.org> References: <20231227090448.2216295-1-treapking@chromium.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20231227_010506_850110_7F0E56F4 X-CRM114-Status: GOOD ( 11.12 ) 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 mt8183-mfgcfg has a mutual dependency with genpd during the probing stage, so enable need_runtim_pm to prevent a deadlock in the following call stack: CPU0: genpd_lock --> clk_prepare_lock genpd_power_off_work_fn() genpd_lock() generic_pm_domain::power_off() clk_unprepare() clk_prepare_lock() CPU1: clk_prepare_lock --> genpd_lock clk_register() __clk_core_init() clk_prepare_lock() clk_pm_runtime_get() genpd_lock() Do a runtime PM get at the probe function to make sure clk_register() won't acquire the genpd lock. Fixes: acddfc2c261b ("clk: mediatek: Add MT8183 clock support") Signed-off-by: Pin-yen Lin --- drivers/clk/mediatek/clk-mt8183-mfgcfg.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/clk/mediatek/clk-mt8183-mfgcfg.c b/drivers/clk/mediatek/clk-mt8183-mfgcfg.c index ba504e19d420..62d876e150e1 100644 --- a/drivers/clk/mediatek/clk-mt8183-mfgcfg.c +++ b/drivers/clk/mediatek/clk-mt8183-mfgcfg.c @@ -29,6 +29,7 @@ static const struct mtk_gate mfg_clks[] = { static const struct mtk_clk_desc mfg_desc = { .clks = mfg_clks, .num_clks = ARRAY_SIZE(mfg_clks), + .need_runtime_pm = true, }; static const struct of_device_id of_match_clk_mt8183_mfg[] = {