From: Johan Hovold <johan+linaro@kernel.org> To: Georgi Djakov <djakov@kernel.org> Cc: "Shawn Guo" <shawnguo@kernel.org>, "Sascha Hauer" <s.hauer@pengutronix.de>, "Pengutronix Kernel Team" <kernel@pengutronix.de>, "Fabio Estevam" <festevam@gmail.com>, "NXP Linux Team" <linux-imx@nxp.com>, "Andy Gross" <agross@kernel.org>, "Bjorn Andersson" <andersson@kernel.org>, "Konrad Dybcio" <konrad.dybcio@linaro.org>, "Sylwester Nawrocki" <s.nawrocki@samsung.com>, "Artur Świgoń" <a.swigon@samsung.com>, "Krzysztof Kozlowski" <krzysztof.kozlowski@linaro.org>, "Alim Akhtar" <alim.akhtar@samsung.com>, "Thierry Reding" <thierry.reding@gmail.com>, "Jonathan Hunter" <jonathanh@nvidia.com>, linux-pm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-arm-msm@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-tegra@vger.kernel.org, linux-kernel@vger.kernel.org, "Johan Hovold" <johan+linaro@kernel.org>, stable@vger.kernel.org, "Dmitry Osipenko" <digetx@gmail.com> Subject: [PATCH v2 19/23] memory: tegra20-emc: fix interconnect registration race Date: Mon, 6 Mar 2023 08:56:47 +0100 [thread overview] Message-ID: <20230306075651.2449-20-johan+linaro@kernel.org> (raw) In-Reply-To: <20230306075651.2449-1-johan+linaro@kernel.org> The current interconnect provider registration interface is inherently racy as nodes are not added until the after adding the provider. This can specifically cause racing DT lookups to fail. Switch to using the new API where the provider is not registered until after it has been fully initialised. Fixes: d5ef16ba5fbe ("memory: tegra20: Support interconnect framework") Cc: stable@vger.kernel.org # 5.11 Cc: Dmitry Osipenko <digetx@gmail.com> Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Signed-off-by: Johan Hovold <johan+linaro@kernel.org> --- drivers/memory/tegra/tegra20-emc.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/drivers/memory/tegra/tegra20-emc.c b/drivers/memory/tegra/tegra20-emc.c index bd4e37b6552d..fd595c851a27 100644 --- a/drivers/memory/tegra/tegra20-emc.c +++ b/drivers/memory/tegra/tegra20-emc.c @@ -1021,15 +1021,13 @@ static int tegra_emc_interconnect_init(struct tegra_emc *emc) emc->provider.aggregate = soc->icc_ops->aggregate; emc->provider.xlate_extended = emc_of_icc_xlate_extended; - err = icc_provider_add(&emc->provider); - if (err) - goto err_msg; + icc_provider_init(&emc->provider); /* create External Memory Controller node */ node = icc_node_create(TEGRA_ICC_EMC); if (IS_ERR(node)) { err = PTR_ERR(node); - goto del_provider; + goto err_msg; } node->name = "External Memory Controller"; @@ -1050,12 +1048,14 @@ static int tegra_emc_interconnect_init(struct tegra_emc *emc) node->name = "External Memory (DRAM)"; icc_node_add(node, &emc->provider); + err = icc_provider_register(&emc->provider); + if (err) + goto remove_nodes; + return 0; remove_nodes: icc_nodes_remove(&emc->provider); -del_provider: - icc_provider_del(&emc->provider); err_msg: dev_err(emc->dev, "failed to initialize ICC: %d\n", err); -- 2.39.2
WARNING: multiple messages have this Message-ID (diff)
From: Johan Hovold <johan+linaro@kernel.org> To: Georgi Djakov <djakov@kernel.org> Cc: "Shawn Guo" <shawnguo@kernel.org>, "Sascha Hauer" <s.hauer@pengutronix.de>, "Pengutronix Kernel Team" <kernel@pengutronix.de>, "Fabio Estevam" <festevam@gmail.com>, "NXP Linux Team" <linux-imx@nxp.com>, "Andy Gross" <agross@kernel.org>, "Bjorn Andersson" <andersson@kernel.org>, "Konrad Dybcio" <konrad.dybcio@linaro.org>, "Sylwester Nawrocki" <s.nawrocki@samsung.com>, "Artur Świgoń" <a.swigon@samsung.com>, "Krzysztof Kozlowski" <krzysztof.kozlowski@linaro.org>, "Alim Akhtar" <alim.akhtar@samsung.com>, "Thierry Reding" <thierry.reding@gmail.com>, "Jonathan Hunter" <jonathanh@nvidia.com>, linux-pm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-arm-msm@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-tegra@vger.kernel.org, linux-kernel@vger.kernel.org, "Johan Hovold" <johan+linaro@kernel.org>, stable@vger.kernel.org, "Dmitry Osipenko" <digetx@gmail.com> Subject: [PATCH v2 19/23] memory: tegra20-emc: fix interconnect registration race Date: Mon, 6 Mar 2023 08:56:47 +0100 [thread overview] Message-ID: <20230306075651.2449-20-johan+linaro@kernel.org> (raw) In-Reply-To: <20230306075651.2449-1-johan+linaro@kernel.org> The current interconnect provider registration interface is inherently racy as nodes are not added until the after adding the provider. This can specifically cause racing DT lookups to fail. Switch to using the new API where the provider is not registered until after it has been fully initialised. Fixes: d5ef16ba5fbe ("memory: tegra20: Support interconnect framework") Cc: stable@vger.kernel.org # 5.11 Cc: Dmitry Osipenko <digetx@gmail.com> Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Signed-off-by: Johan Hovold <johan+linaro@kernel.org> --- drivers/memory/tegra/tegra20-emc.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/drivers/memory/tegra/tegra20-emc.c b/drivers/memory/tegra/tegra20-emc.c index bd4e37b6552d..fd595c851a27 100644 --- a/drivers/memory/tegra/tegra20-emc.c +++ b/drivers/memory/tegra/tegra20-emc.c @@ -1021,15 +1021,13 @@ static int tegra_emc_interconnect_init(struct tegra_emc *emc) emc->provider.aggregate = soc->icc_ops->aggregate; emc->provider.xlate_extended = emc_of_icc_xlate_extended; - err = icc_provider_add(&emc->provider); - if (err) - goto err_msg; + icc_provider_init(&emc->provider); /* create External Memory Controller node */ node = icc_node_create(TEGRA_ICC_EMC); if (IS_ERR(node)) { err = PTR_ERR(node); - goto del_provider; + goto err_msg; } node->name = "External Memory Controller"; @@ -1050,12 +1048,14 @@ static int tegra_emc_interconnect_init(struct tegra_emc *emc) node->name = "External Memory (DRAM)"; icc_node_add(node, &emc->provider); + err = icc_provider_register(&emc->provider); + if (err) + goto remove_nodes; + return 0; remove_nodes: icc_nodes_remove(&emc->provider); -del_provider: - icc_provider_del(&emc->provider); err_msg: dev_err(emc->dev, "failed to initialize ICC: %d\n", err); -- 2.39.2 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2023-03-06 7:57 UTC|newest] Thread overview: 66+ messages / expand[flat|nested] mbox.gz Atom feed top 2023-03-06 7:56 [PATCH v2 00/23] interconnect: fix racy provider registration Johan Hovold 2023-03-06 7:56 ` Johan Hovold 2023-03-06 7:56 ` [PATCH v2 01/23] interconnect: fix mem leak when freeing nodes Johan Hovold 2023-03-06 7:56 ` Johan Hovold 2023-03-07 9:42 ` Luca Ceresoli 2023-03-07 9:42 ` Luca Ceresoli 2023-03-06 7:56 ` [PATCH v2 02/23] interconnect: fix icc_provider_del() error handling Johan Hovold 2023-03-06 7:56 ` Johan Hovold 2023-03-07 9:43 ` Luca Ceresoli 2023-03-07 9:43 ` Luca Ceresoli 2023-03-06 7:56 ` [PATCH v2 03/23] interconnect: fix provider registration API Johan Hovold 2023-03-06 7:56 ` Johan Hovold 2023-03-07 9:43 ` Luca Ceresoli 2023-03-07 9:43 ` Luca Ceresoli 2023-03-06 7:56 ` [PATCH v2 04/23] interconnect: imx: fix registration race Johan Hovold 2023-03-06 7:56 ` Johan Hovold 2023-03-07 9:43 ` Luca Ceresoli 2023-03-07 9:43 ` Luca Ceresoli 2023-03-07 10:25 ` Johan Hovold 2023-03-07 10:25 ` Johan Hovold 2023-03-06 7:56 ` [PATCH v2 05/23] interconnect: qcom: osm-l3: " Johan Hovold 2023-03-06 7:56 ` Johan Hovold 2023-03-06 7:56 ` [PATCH v2 06/23] interconnect: qcom: rpm: fix probe child-node error handling Johan Hovold 2023-03-06 7:56 ` Johan Hovold 2023-03-06 7:56 ` [PATCH v2 07/23] interconnect: qcom: rpm: fix probe PM domain " Johan Hovold 2023-03-06 7:56 ` Johan Hovold 2023-03-06 7:56 ` [PATCH v2 08/23] interconnect: qcom: rpm: fix registration race Johan Hovold 2023-03-06 7:56 ` Johan Hovold 2023-03-06 7:56 ` [PATCH v2 09/23] interconnect: qcom: rpmh: fix probe child-node error handling Johan Hovold 2023-03-06 7:56 ` Johan Hovold 2023-03-06 7:56 ` [PATCH v2 10/23] interconnect: qcom: rpmh: fix registration race Johan Hovold 2023-03-06 7:56 ` Johan Hovold 2023-03-06 7:56 ` [PATCH v2 11/23] interconnect: qcom: msm8974: " Johan Hovold 2023-03-06 7:56 ` Johan Hovold 2023-03-06 7:56 ` [PATCH v2 12/23] interconnect: qcom: sm8450: " Johan Hovold 2023-03-06 7:56 ` Johan Hovold 2023-03-06 7:56 ` [PATCH v2 13/23] interconnect: qcom: sm8550: " Johan Hovold 2023-03-06 7:56 ` Johan Hovold 2023-03-06 9:03 ` Abel Vesa 2023-03-06 9:03 ` Abel Vesa 2023-03-06 9:34 ` Johan Hovold 2023-03-06 9:34 ` Johan Hovold 2023-03-06 9:39 ` Abel Vesa 2023-03-06 9:39 ` Abel Vesa 2023-03-06 10:04 ` Johan Hovold 2023-03-06 10:04 ` Johan Hovold 2023-03-06 7:56 ` [PATCH v2 14/23] interconnect: exynos: fix node leak in probe PM QoS error path Johan Hovold 2023-03-06 7:56 ` Johan Hovold 2023-03-06 7:56 ` [PATCH v2 15/23] interconnect: exynos: fix registration race Johan Hovold 2023-03-06 7:56 ` Johan Hovold 2023-03-06 7:56 ` [PATCH v2 16/23] interconnect: exynos: drop redundant link destroy Johan Hovold 2023-03-06 7:56 ` Johan Hovold 2023-03-06 7:56 ` [PATCH v2 17/23] memory: tegra: fix interconnect registration race Johan Hovold 2023-03-06 7:56 ` Johan Hovold 2023-03-06 7:56 ` [PATCH v2 18/23] memory: tegra124-emc: " Johan Hovold 2023-03-06 7:56 ` Johan Hovold 2023-03-06 7:56 ` Johan Hovold [this message] 2023-03-06 7:56 ` [PATCH v2 19/23] memory: tegra20-emc: " Johan Hovold 2023-03-06 7:56 ` [PATCH v2 20/23] memory: tegra30-emc: " Johan Hovold 2023-03-06 7:56 ` Johan Hovold 2023-03-06 7:56 ` [PATCH v2 21/23] interconnect: drop racy registration API Johan Hovold 2023-03-06 7:56 ` Johan Hovold 2023-03-06 7:56 ` [PATCH v2 22/23] interconnect: drop unused icc_get() interface Johan Hovold 2023-03-06 7:56 ` Johan Hovold 2023-03-06 7:56 ` [PATCH v2 23/23] interconnect: drop unused icc_link_destroy() interface Johan Hovold 2023-03-06 7:56 ` Johan Hovold
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