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([178.197.215.209]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-a83838d023dsm733613366b.64.2024.08.20.02.40.26 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 20 Aug 2024 02:40:26 -0700 (PDT) From: Krzysztof Kozlowski To: Anup Patel , "Rafael J. Wysocki" , Daniel Lezcano , Paul Walmsley , Palmer Dabbelt , Albert Ou , Atish Patra , linux-pm@vger.kernel.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org Cc: Krzysztof Kozlowski , stable@vger.kernel.org Subject: [PATCH v2 1/2] cpuidle: riscv-sbi: Use scoped device node handling to fix missing of_node_put Date: Tue, 20 Aug 2024 11:40:22 +0200 Message-ID: <20240820094023.61155-1-krzysztof.kozlowski@linaro.org> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Two return statements in sbi_cpuidle_dt_init_states() did not drop the OF node reference count. Solve the issue and simplify entire error handling with scoped/cleanup.h. Fixes: 6abf32f1d9c5 ("cpuidle: Add RISC-V SBI CPU idle driver") Cc: Signed-off-by: Krzysztof Kozlowski Reviewed-by: Anup Patel --- Changes in v2: 1. Re-write commit msg, because this is actually a fix. --- drivers/cpuidle/cpuidle-riscv-sbi.c | 21 +++++++-------------- 1 file changed, 7 insertions(+), 14 deletions(-) diff --git a/drivers/cpuidle/cpuidle-riscv-sbi.c b/drivers/cpuidle/cpuidle-riscv-sbi.c index a6e123dfe394..5bb3401220d2 100644 --- a/drivers/cpuidle/cpuidle-riscv-sbi.c +++ b/drivers/cpuidle/cpuidle-riscv-sbi.c @@ -8,6 +8,7 @@ #define pr_fmt(fmt) "cpuidle-riscv-sbi: " fmt +#include #include #include #include @@ -236,19 +237,16 @@ static int sbi_cpuidle_dt_init_states(struct device *dev, { struct sbi_cpuidle_data *data = per_cpu_ptr(&sbi_cpuidle_data, cpu); struct device_node *state_node; - struct device_node *cpu_node; u32 *states; int i, ret; - cpu_node = of_cpu_device_node_get(cpu); + struct device_node *cpu_node __free(device_node) = of_cpu_device_node_get(cpu); if (!cpu_node) return -ENODEV; states = devm_kcalloc(dev, state_count, sizeof(*states), GFP_KERNEL); - if (!states) { - ret = -ENOMEM; - goto fail; - } + if (!states) + return -ENOMEM; /* Parse SBI specific details from state DT nodes */ for (i = 1; i < state_count; i++) { @@ -264,10 +262,8 @@ static int sbi_cpuidle_dt_init_states(struct device *dev, pr_debug("sbi-state %#x index %d\n", states[i], i); } - if (i != state_count) { - ret = -ENODEV; - goto fail; - } + if (i != state_count) + return -ENODEV; /* Initialize optional data, used for the hierarchical topology. */ ret = sbi_dt_cpu_init_topology(drv, data, state_count, cpu); @@ -277,10 +273,7 @@ static int sbi_cpuidle_dt_init_states(struct device *dev, /* Store states in the per-cpu struct. */ data->states = states; -fail: - of_node_put(cpu_node); - - return ret; + return 0; } static void sbi_cpuidle_deinit_cpu(int cpu) From patchwork Tue Aug 20 09:40:23 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Krzysztof Kozlowski X-Patchwork-Id: 821202 Received: from mail-ej1-f52.google.com (mail-ej1-f52.google.com [209.85.218.52]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3997118CC19 for ; 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([178.197.215.209]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-a83838d023dsm733613366b.64.2024.08.20.02.40.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 20 Aug 2024 02:40:27 -0700 (PDT) From: Krzysztof Kozlowski To: Anup Patel , "Rafael J. Wysocki" , Daniel Lezcano , Paul Walmsley , Palmer Dabbelt , Albert Ou , Atish Patra , linux-pm@vger.kernel.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org Cc: Krzysztof Kozlowski , Jonathan Cameron Subject: [PATCH v2 2/2] cpuidle: riscv-sbi: Simplify with scoped for each OF child loop Date: Tue, 20 Aug 2024 11:40:23 +0200 Message-ID: <20240820094023.61155-2-krzysztof.kozlowski@linaro.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240820094023.61155-1-krzysztof.kozlowski@linaro.org> References: <20240820094023.61155-1-krzysztof.kozlowski@linaro.org> Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Use scoped for_each_child_of_node_scoped() when iterating over device nodes to make code a bit simpler. Reviewed-by: Jonathan Cameron Signed-off-by: Krzysztof Kozlowski --- Changes in v2: 1. None, only Rb tag. Other patches from the set were applied. --- drivers/cpuidle/cpuidle-riscv-sbi.c | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-) diff --git a/drivers/cpuidle/cpuidle-riscv-sbi.c b/drivers/cpuidle/cpuidle-riscv-sbi.c index 5bb3401220d2..d228b4d18d56 100644 --- a/drivers/cpuidle/cpuidle-riscv-sbi.c +++ b/drivers/cpuidle/cpuidle-riscv-sbi.c @@ -448,7 +448,6 @@ static void sbi_pd_remove(void) static int sbi_genpd_probe(struct device_node *np) { - struct device_node *node; int ret = 0, pd_count = 0; if (!np) @@ -458,13 +457,13 @@ static int sbi_genpd_probe(struct device_node *np) * Parse child nodes for the "#power-domain-cells" property and * initialize a genpd/genpd-of-provider pair when it's found. */ - for_each_child_of_node(np, node) { + for_each_child_of_node_scoped(np, node) { if (!of_property_present(node, "#power-domain-cells")) continue; ret = sbi_pd_init(node); if (ret) - goto put_node; + goto remove_pd; pd_count++; } @@ -480,8 +479,6 @@ static int sbi_genpd_probe(struct device_node *np) return 0; -put_node: - of_node_put(node); remove_pd: sbi_pd_remove(); pr_err("failed to create CPU PM domains ret=%d\n", ret);