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FAILED: patch "[PATCH] interconnect: qcom: osm-l3: fix registration race" failed to apply to 5.15-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 5.15-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.15.y git checkout FETCH_HEAD git cherry-pick -x 174941ed28a3573db075da46d95b4dcf9d4c49c2 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '167930400918528(a)kroah.com' --subject-prefix 'PATCH 5.15.y' HEAD^.. Possible dependencies: 174941ed28a3 ("interconnect: qcom: osm-l3: fix registration race") f221bd781f25 ("interconnect: osm-l3: Ignore return value of icc_provider_del() in .remove()") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 174941ed28a3573db075da46d95b4dcf9d4c49c2 Mon Sep 17 00:00:00 2001 From: Johan Hovold <johan+linaro(a)kernel.org> Date: Mon, 6 Mar 2023 08:56:33 +0100 Subject: [PATCH] interconnect: qcom: osm-l3: fix registration race 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: of_icc_xlate_onecell: invalid index 0 cpu cpu0: error -EINVAL: error finding src node cpu cpu0: dev_pm_opp_of_find_icc_paths: Unable to get path0: -22 qcom-cpufreq-hw: probe of 18591000.cpufreq failed with error -22 Switch to using the new API where the provider is not registered until after it has been fully initialised. Fixes: 5bc9900addaf ("interconnect: qcom: Add OSM L3 interconnect provider support") Cc: stable(a)vger.kernel.org # 5.7 Reviewed-by: Konrad Dybcio <konrad.dybcio(a)linaro.org> Signed-off-by: Johan Hovold <johan+linaro(a)kernel.org> Link: https://lore.kernel.org/r/20230306075651.2449-6-johan+linaro@kernel.org Signed-off-by: Georgi Djakov <djakov(a)kernel.org> diff --git a/drivers/interconnect/qcom/osm-l3.c b/drivers/interconnect/qcom/osm-l3.c index 1bc01ff6e02a..1bafb54f1432 100644 --- a/drivers/interconnect/qcom/osm-l3.c +++ b/drivers/interconnect/qcom/osm-l3.c @@ -158,8 +158,8 @@ static int qcom_osm_l3_remove(struct platform_device *pdev) { struct qcom_osm_l3_icc_provider *qp = platform_get_drvdata(pdev); + icc_provider_deregister(&qp->provider); icc_nodes_remove(&qp->provider); - icc_provider_del(&qp->provider); return 0; } @@ -245,14 +245,9 @@ static int qcom_osm_l3_probe(struct platform_device *pdev) provider->set = qcom_osm_l3_set; provider->aggregate = icc_std_aggregate; provider->xlate = of_icc_xlate_onecell; - INIT_LIST_HEAD(&provider->nodes); provider->data = data; - ret = icc_provider_add(provider); - if (ret) { - dev_err(&pdev->dev, "error adding interconnect provider\n"); - return ret; - } + icc_provider_init(provider); for (i = 0; i < num_nodes; i++) { size_t j; @@ -275,12 +270,15 @@ static int qcom_osm_l3_probe(struct platform_device *pdev) } data->num_nodes = num_nodes; + ret = icc_provider_register(provider); + if (ret) + goto err; + platform_set_drvdata(pdev, qp); return 0; err: icc_nodes_remove(provider); - icc_provider_del(provider); return ret; }

2 years, 7 months

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FAILED: patch "[PATCH] interconnect: imx: fix registration race" failed to apply to 5.10-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 5.10-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.10.y git checkout FETCH_HEAD git cherry-pick -x 9fbd35520f1f7f3cbe1873939a27ad9b009f21f9 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '167930397951185(a)kroah.com' --subject-prefix 'PATCH 5.10.y' HEAD^.. Possible dependencies: 9fbd35520f1f ("interconnect: imx: fix registration race") f62e3f595c5f ("interconnect: imx: Make imx_icc_unregister() return void") 7ec26b8dcc5c ("interconnect: imx: Ignore return value of icc_provider_del() in .remove()") c14ec5c93dc8 ("interconnect: imx: Add platform driver for imx8mp") 7980d85a9443 ("interconnect: imx: configure NoC mode/prioriry/ext_control") 12db59e8e0a2 ("interconnect: imx: introduce imx_icc_provider") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 9fbd35520f1f7f3cbe1873939a27ad9b009f21f9 Mon Sep 17 00:00:00 2001 From: Johan Hovold <johan+linaro(a)kernel.org> Date: Mon, 6 Mar 2023 08:56:32 +0100 Subject: [PATCH] interconnect: imx: fix registration race 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: f0d8048525d7 ("interconnect: Add imx core driver") Cc: stable(a)vger.kernel.org # 5.8 Cc: Alexandre Bailon <abailon(a)baylibre.com> Reviewed-by: Konrad Dybcio <konrad.dybcio(a)linaro.org> Signed-off-by: Johan Hovold <johan+linaro(a)kernel.org> Tested-by: Luca Ceresoli <luca.ceresoli(a)bootlin.com> # i.MX8MP MSC SM2-MB-EP1 Board Link: https://lore.kernel.org/r/20230306075651.2449-5-johan+linaro@kernel.org Signed-off-by: Georgi Djakov <djakov(a)kernel.org> diff --git a/drivers/interconnect/imx/imx.c b/drivers/interconnect/imx/imx.c index 823d9be9771a..979ed610f704 100644 --- a/drivers/interconnect/imx/imx.c +++ b/drivers/interconnect/imx/imx.c @@ -295,6 +295,9 @@ int imx_icc_register(struct platform_device *pdev, provider->xlate = of_icc_xlate_onecell; provider->data = data; provider->dev = dev->parent; + + icc_provider_init(provider); + platform_set_drvdata(pdev, imx_provider); if (settings) { @@ -306,20 +309,18 @@ int imx_icc_register(struct platform_device *pdev, } } - ret = icc_provider_add(provider); - if (ret) { - dev_err(dev, "error adding interconnect provider: %d\n", ret); + ret = imx_icc_register_nodes(imx_provider, nodes, nodes_count, settings); + if (ret) return ret; - } - ret = imx_icc_register_nodes(imx_provider, nodes, nodes_count, settings); + ret = icc_provider_register(provider); if (ret) - goto provider_del; + goto err_unregister_nodes; return 0; -provider_del: - icc_provider_del(provider); +err_unregister_nodes: + imx_icc_unregister_nodes(&imx_provider->provider); return ret; } EXPORT_SYMBOL_GPL(imx_icc_register); @@ -328,9 +329,8 @@ void imx_icc_unregister(struct platform_device *pdev) { struct imx_icc_provider *imx_provider = platform_get_drvdata(pdev); + icc_provider_deregister(&imx_provider->provider); imx_icc_unregister_nodes(&imx_provider->provider); - - icc_provider_del(&imx_provider->provider); } EXPORT_SYMBOL_GPL(imx_icc_unregister);

2 years, 7 months

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0 0

FAILED: patch "[PATCH] interconnect: imx: fix registration race" failed to apply to 5.15-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 5.15-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.15.y git checkout FETCH_HEAD git cherry-pick -x 9fbd35520f1f7f3cbe1873939a27ad9b009f21f9 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '1679303978128132(a)kroah.com' --subject-prefix 'PATCH 5.15.y' HEAD^.. Possible dependencies: 9fbd35520f1f ("interconnect: imx: fix registration race") f62e3f595c5f ("interconnect: imx: Make imx_icc_unregister() return void") 7ec26b8dcc5c ("interconnect: imx: Ignore return value of icc_provider_del() in .remove()") c14ec5c93dc8 ("interconnect: imx: Add platform driver for imx8mp") 7980d85a9443 ("interconnect: imx: configure NoC mode/prioriry/ext_control") 12db59e8e0a2 ("interconnect: imx: introduce imx_icc_provider") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 9fbd35520f1f7f3cbe1873939a27ad9b009f21f9 Mon Sep 17 00:00:00 2001 From: Johan Hovold <johan+linaro(a)kernel.org> Date: Mon, 6 Mar 2023 08:56:32 +0100 Subject: [PATCH] interconnect: imx: fix registration race 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: f0d8048525d7 ("interconnect: Add imx core driver") Cc: stable(a)vger.kernel.org # 5.8 Cc: Alexandre Bailon <abailon(a)baylibre.com> Reviewed-by: Konrad Dybcio <konrad.dybcio(a)linaro.org> Signed-off-by: Johan Hovold <johan+linaro(a)kernel.org> Tested-by: Luca Ceresoli <luca.ceresoli(a)bootlin.com> # i.MX8MP MSC SM2-MB-EP1 Board Link: https://lore.kernel.org/r/20230306075651.2449-5-johan+linaro@kernel.org Signed-off-by: Georgi Djakov <djakov(a)kernel.org> diff --git a/drivers/interconnect/imx/imx.c b/drivers/interconnect/imx/imx.c index 823d9be9771a..979ed610f704 100644 --- a/drivers/interconnect/imx/imx.c +++ b/drivers/interconnect/imx/imx.c @@ -295,6 +295,9 @@ int imx_icc_register(struct platform_device *pdev, provider->xlate = of_icc_xlate_onecell; provider->data = data; provider->dev = dev->parent; + + icc_provider_init(provider); + platform_set_drvdata(pdev, imx_provider); if (settings) { @@ -306,20 +309,18 @@ int imx_icc_register(struct platform_device *pdev, } } - ret = icc_provider_add(provider); - if (ret) { - dev_err(dev, "error adding interconnect provider: %d\n", ret); + ret = imx_icc_register_nodes(imx_provider, nodes, nodes_count, settings); + if (ret) return ret; - } - ret = imx_icc_register_nodes(imx_provider, nodes, nodes_count, settings); + ret = icc_provider_register(provider); if (ret) - goto provider_del; + goto err_unregister_nodes; return 0; -provider_del: - icc_provider_del(provider); +err_unregister_nodes: + imx_icc_unregister_nodes(&imx_provider->provider); return ret; } EXPORT_SYMBOL_GPL(imx_icc_register); @@ -328,9 +329,8 @@ void imx_icc_unregister(struct platform_device *pdev) { struct imx_icc_provider *imx_provider = platform_get_drvdata(pdev); + icc_provider_deregister(&imx_provider->provider); imx_icc_unregister_nodes(&imx_provider->provider); - - icc_provider_del(&imx_provider->provider); } EXPORT_SYMBOL_GPL(imx_icc_unregister);

2 years, 7 months

1
0
0 0

FAILED: patch "[PATCH] interconnect: fix provider registration API" failed to apply to 5.4-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 5.4-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.4.y git checkout FETCH_HEAD git cherry-pick -x eb59eca0d8ac15f8c1b7f1cd35999455a90292c0 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '1679303964189192(a)kroah.com' --subject-prefix 'PATCH 5.4.y' HEAD^.. Possible dependencies: eb59eca0d8ac ("interconnect: fix provider registration API") e0e7089bf9a8 ("interconnect: fix icc_provider_del() error handling") 680f8666baf6 ("interconnect: Make icc_provider_del() return void") 1521e22bfa12 ("interconnect: Introduce xlate_extended() callback") 8a307d3601bc ("interconnect: Export of_icc_get_from_provider()") 1597d453289b ("interconnect: Add of_icc_get_by_index() helper function") 3791163602f7 ("interconnect: Handle memory allocation errors") 05309830e1f8 ("interconnect: Add a name to struct icc_path") dd018a9cf910 ("interconnect: Move internal structs into a separate file") 3cce2c6fa70c ("interconnect: Add a common helper for removing all nodes") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From eb59eca0d8ac15f8c1b7f1cd35999455a90292c0 Mon Sep 17 00:00:00 2001 From: Johan Hovold <johan+linaro(a)kernel.org> Date: Mon, 6 Mar 2023 08:56:31 +0100 Subject: [PATCH] interconnect: fix provider registration API The current interconnect provider interface is inherently racy as providers are expected to be added before being fully initialised. Specifically, nodes are currently not added and the provider data is not initialised until after registering the provider which can cause racing DT lookups to fail. Add a new provider API which will be used to fix up the interconnect drivers. The old API is reimplemented using the new interface and will be removed once all drivers have been fixed. Fixes: 11f1ceca7031 ("interconnect: Add generic on-chip interconnect API") Fixes: 87e3031b6fbd ("interconnect: Allow endpoints translation via DT") Cc: stable(a)vger.kernel.org # 5.1 Reviewed-by: Konrad Dybcio <konrad.dybcio(a)linaro.org> Signed-off-by: Johan Hovold <johan+linaro(a)kernel.org> Tested-by: Luca Ceresoli <luca.ceresoli(a)bootlin.com> # i.MX8MP MSC SM2-MB-EP1 Board Link: https://lore.kernel.org/r/20230306075651.2449-4-johan+linaro@kernel.org Signed-off-by: Georgi Djakov <djakov(a)kernel.org> diff --git a/drivers/interconnect/core.c b/drivers/interconnect/core.c index cabb6f5df83e..7a24c1444ace 100644 --- a/drivers/interconnect/core.c +++ b/drivers/interconnect/core.c @@ -1033,44 +1033,68 @@ int icc_nodes_remove(struct icc_provider *provider) EXPORT_SYMBOL_GPL(icc_nodes_remove); /** - * icc_provider_add() - add a new interconnect provider - * @provider: the interconnect provider that will be added into topology + * icc_provider_init() - initialize a new interconnect provider + * @provider: the interconnect provider to initialize + * + * Must be called before adding nodes to the provider. + */ +void icc_provider_init(struct icc_provider *provider) +{ + WARN_ON(!provider->set); + + INIT_LIST_HEAD(&provider->nodes); +} +EXPORT_SYMBOL_GPL(icc_provider_init); + +/** + * icc_provider_register() - register a new interconnect provider + * @provider: the interconnect provider to register * * Return: 0 on success, or an error code otherwise */ -int icc_provider_add(struct icc_provider *provider) +int icc_provider_register(struct icc_provider *provider) { - if (WARN_ON(!provider->set)) - return -EINVAL; if (WARN_ON(!provider->xlate && !provider->xlate_extended)) return -EINVAL; mutex_lock(&icc_lock); - - INIT_LIST_HEAD(&provider->nodes); list_add_tail(&provider->provider_list, &icc_providers); - mutex_unlock(&icc_lock); - dev_dbg(provider->dev, "interconnect provider added to topology\n"); + dev_dbg(provider->dev, "interconnect provider registered\n"); return 0; } -EXPORT_SYMBOL_GPL(icc_provider_add); +EXPORT_SYMBOL_GPL(icc_provider_register); /** - * icc_provider_del() - delete previously added interconnect provider - * @provider: the interconnect provider that will be removed from topology + * icc_provider_deregister() - deregister an interconnect provider + * @provider: the interconnect provider to deregister */ -void icc_provider_del(struct icc_provider *provider) +void icc_provider_deregister(struct icc_provider *provider) { mutex_lock(&icc_lock); WARN_ON(provider->users); - WARN_ON(!list_empty(&provider->nodes)); list_del(&provider->provider_list); mutex_unlock(&icc_lock); } +EXPORT_SYMBOL_GPL(icc_provider_deregister); + +int icc_provider_add(struct icc_provider *provider) +{ + icc_provider_init(provider); + + return icc_provider_register(provider); +} +EXPORT_SYMBOL_GPL(icc_provider_add); + +void icc_provider_del(struct icc_provider *provider) +{ + WARN_ON(!list_empty(&provider->nodes)); + + icc_provider_deregister(provider); +} EXPORT_SYMBOL_GPL(icc_provider_del); static const struct of_device_id __maybe_unused ignore_list[] = { diff --git a/include/linux/interconnect-provider.h b/include/linux/interconnect-provider.h index cd5c5a27557f..d12cd18aab3f 100644 --- a/include/linux/interconnect-provider.h +++ b/include/linux/interconnect-provider.h @@ -122,6 +122,9 @@ int icc_link_destroy(struct icc_node *src, struct icc_node *dst); void icc_node_add(struct icc_node *node, struct icc_provider *provider); void icc_node_del(struct icc_node *node); int icc_nodes_remove(struct icc_provider *provider); +void icc_provider_init(struct icc_provider *provider); +int icc_provider_register(struct icc_provider *provider); +void icc_provider_deregister(struct icc_provider *provider); int icc_provider_add(struct icc_provider *provider); void icc_provider_del(struct icc_provider *provider); struct icc_node_data *of_icc_get_from_provider(struct of_phandle_args *spec); @@ -167,6 +170,15 @@ static inline int icc_nodes_remove(struct icc_provider *provider) return -ENOTSUPP; } +static inline void icc_provider_init(struct icc_provider *provider) { } + +static inline int icc_provider_register(struct icc_provider *provider) +{ + return -ENOTSUPP; +} + +static inline void icc_provider_deregister(struct icc_provider *provider) { } + static inline int icc_provider_add(struct icc_provider *provider) { return -ENOTSUPP;

2 years, 7 months

1
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0 0

FAILED: patch "[PATCH] interconnect: fix provider registration API" failed to apply to 5.10-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 5.10-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.10.y git checkout FETCH_HEAD git cherry-pick -x eb59eca0d8ac15f8c1b7f1cd35999455a90292c0 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '1679303963252165(a)kroah.com' --subject-prefix 'PATCH 5.10.y' HEAD^.. Possible dependencies: eb59eca0d8ac ("interconnect: fix provider registration API") e0e7089bf9a8 ("interconnect: fix icc_provider_del() error handling") 680f8666baf6 ("interconnect: Make icc_provider_del() return void") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From eb59eca0d8ac15f8c1b7f1cd35999455a90292c0 Mon Sep 17 00:00:00 2001 From: Johan Hovold <johan+linaro(a)kernel.org> Date: Mon, 6 Mar 2023 08:56:31 +0100 Subject: [PATCH] interconnect: fix provider registration API The current interconnect provider interface is inherently racy as providers are expected to be added before being fully initialised. Specifically, nodes are currently not added and the provider data is not initialised until after registering the provider which can cause racing DT lookups to fail. Add a new provider API which will be used to fix up the interconnect drivers. The old API is reimplemented using the new interface and will be removed once all drivers have been fixed. Fixes: 11f1ceca7031 ("interconnect: Add generic on-chip interconnect API") Fixes: 87e3031b6fbd ("interconnect: Allow endpoints translation via DT") Cc: stable(a)vger.kernel.org # 5.1 Reviewed-by: Konrad Dybcio <konrad.dybcio(a)linaro.org> Signed-off-by: Johan Hovold <johan+linaro(a)kernel.org> Tested-by: Luca Ceresoli <luca.ceresoli(a)bootlin.com> # i.MX8MP MSC SM2-MB-EP1 Board Link: https://lore.kernel.org/r/20230306075651.2449-4-johan+linaro@kernel.org Signed-off-by: Georgi Djakov <djakov(a)kernel.org> diff --git a/drivers/interconnect/core.c b/drivers/interconnect/core.c index cabb6f5df83e..7a24c1444ace 100644 --- a/drivers/interconnect/core.c +++ b/drivers/interconnect/core.c @@ -1033,44 +1033,68 @@ int icc_nodes_remove(struct icc_provider *provider) EXPORT_SYMBOL_GPL(icc_nodes_remove); /** - * icc_provider_add() - add a new interconnect provider - * @provider: the interconnect provider that will be added into topology + * icc_provider_init() - initialize a new interconnect provider + * @provider: the interconnect provider to initialize + * + * Must be called before adding nodes to the provider. + */ +void icc_provider_init(struct icc_provider *provider) +{ + WARN_ON(!provider->set); + + INIT_LIST_HEAD(&provider->nodes); +} +EXPORT_SYMBOL_GPL(icc_provider_init); + +/** + * icc_provider_register() - register a new interconnect provider + * @provider: the interconnect provider to register * * Return: 0 on success, or an error code otherwise */ -int icc_provider_add(struct icc_provider *provider) +int icc_provider_register(struct icc_provider *provider) { - if (WARN_ON(!provider->set)) - return -EINVAL; if (WARN_ON(!provider->xlate && !provider->xlate_extended)) return -EINVAL; mutex_lock(&icc_lock); - - INIT_LIST_HEAD(&provider->nodes); list_add_tail(&provider->provider_list, &icc_providers); - mutex_unlock(&icc_lock); - dev_dbg(provider->dev, "interconnect provider added to topology\n"); + dev_dbg(provider->dev, "interconnect provider registered\n"); return 0; } -EXPORT_SYMBOL_GPL(icc_provider_add); +EXPORT_SYMBOL_GPL(icc_provider_register); /** - * icc_provider_del() - delete previously added interconnect provider - * @provider: the interconnect provider that will be removed from topology + * icc_provider_deregister() - deregister an interconnect provider + * @provider: the interconnect provider to deregister */ -void icc_provider_del(struct icc_provider *provider) +void icc_provider_deregister(struct icc_provider *provider) { mutex_lock(&icc_lock); WARN_ON(provider->users); - WARN_ON(!list_empty(&provider->nodes)); list_del(&provider->provider_list); mutex_unlock(&icc_lock); } +EXPORT_SYMBOL_GPL(icc_provider_deregister); + +int icc_provider_add(struct icc_provider *provider) +{ + icc_provider_init(provider); + + return icc_provider_register(provider); +} +EXPORT_SYMBOL_GPL(icc_provider_add); + +void icc_provider_del(struct icc_provider *provider) +{ + WARN_ON(!list_empty(&provider->nodes)); + + icc_provider_deregister(provider); +} EXPORT_SYMBOL_GPL(icc_provider_del); static const struct of_device_id __maybe_unused ignore_list[] = { diff --git a/include/linux/interconnect-provider.h b/include/linux/interconnect-provider.h index cd5c5a27557f..d12cd18aab3f 100644 --- a/include/linux/interconnect-provider.h +++ b/include/linux/interconnect-provider.h @@ -122,6 +122,9 @@ int icc_link_destroy(struct icc_node *src, struct icc_node *dst); void icc_node_add(struct icc_node *node, struct icc_provider *provider); void icc_node_del(struct icc_node *node); int icc_nodes_remove(struct icc_provider *provider); +void icc_provider_init(struct icc_provider *provider); +int icc_provider_register(struct icc_provider *provider); +void icc_provider_deregister(struct icc_provider *provider); int icc_provider_add(struct icc_provider *provider); void icc_provider_del(struct icc_provider *provider); struct icc_node_data *of_icc_get_from_provider(struct of_phandle_args *spec); @@ -167,6 +170,15 @@ static inline int icc_nodes_remove(struct icc_provider *provider) return -ENOTSUPP; } +static inline void icc_provider_init(struct icc_provider *provider) { } + +static inline int icc_provider_register(struct icc_provider *provider) +{ + return -ENOTSUPP; +} + +static inline void icc_provider_deregister(struct icc_provider *provider) { } + static inline int icc_provider_add(struct icc_provider *provider) { return -ENOTSUPP;

2 years, 7 months

1
0
0 0

FAILED: patch "[PATCH] interconnect: fix provider registration API" failed to apply to 5.15-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 5.15-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.15.y git checkout FETCH_HEAD git cherry-pick -x eb59eca0d8ac15f8c1b7f1cd35999455a90292c0 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '16793039624279(a)kroah.com' --subject-prefix 'PATCH 5.15.y' HEAD^.. Possible dependencies: eb59eca0d8ac ("interconnect: fix provider registration API") e0e7089bf9a8 ("interconnect: fix icc_provider_del() error handling") 680f8666baf6 ("interconnect: Make icc_provider_del() return void") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From eb59eca0d8ac15f8c1b7f1cd35999455a90292c0 Mon Sep 17 00:00:00 2001 From: Johan Hovold <johan+linaro(a)kernel.org> Date: Mon, 6 Mar 2023 08:56:31 +0100 Subject: [PATCH] interconnect: fix provider registration API The current interconnect provider interface is inherently racy as providers are expected to be added before being fully initialised. Specifically, nodes are currently not added and the provider data is not initialised until after registering the provider which can cause racing DT lookups to fail. Add a new provider API which will be used to fix up the interconnect drivers. The old API is reimplemented using the new interface and will be removed once all drivers have been fixed. Fixes: 11f1ceca7031 ("interconnect: Add generic on-chip interconnect API") Fixes: 87e3031b6fbd ("interconnect: Allow endpoints translation via DT") Cc: stable(a)vger.kernel.org # 5.1 Reviewed-by: Konrad Dybcio <konrad.dybcio(a)linaro.org> Signed-off-by: Johan Hovold <johan+linaro(a)kernel.org> Tested-by: Luca Ceresoli <luca.ceresoli(a)bootlin.com> # i.MX8MP MSC SM2-MB-EP1 Board Link: https://lore.kernel.org/r/20230306075651.2449-4-johan+linaro@kernel.org Signed-off-by: Georgi Djakov <djakov(a)kernel.org> diff --git a/drivers/interconnect/core.c b/drivers/interconnect/core.c index cabb6f5df83e..7a24c1444ace 100644 --- a/drivers/interconnect/core.c +++ b/drivers/interconnect/core.c @@ -1033,44 +1033,68 @@ int icc_nodes_remove(struct icc_provider *provider) EXPORT_SYMBOL_GPL(icc_nodes_remove); /** - * icc_provider_add() - add a new interconnect provider - * @provider: the interconnect provider that will be added into topology + * icc_provider_init() - initialize a new interconnect provider + * @provider: the interconnect provider to initialize + * + * Must be called before adding nodes to the provider. + */ +void icc_provider_init(struct icc_provider *provider) +{ + WARN_ON(!provider->set); + + INIT_LIST_HEAD(&provider->nodes); +} +EXPORT_SYMBOL_GPL(icc_provider_init); + +/** + * icc_provider_register() - register a new interconnect provider + * @provider: the interconnect provider to register * * Return: 0 on success, or an error code otherwise */ -int icc_provider_add(struct icc_provider *provider) +int icc_provider_register(struct icc_provider *provider) { - if (WARN_ON(!provider->set)) - return -EINVAL; if (WARN_ON(!provider->xlate && !provider->xlate_extended)) return -EINVAL; mutex_lock(&icc_lock); - - INIT_LIST_HEAD(&provider->nodes); list_add_tail(&provider->provider_list, &icc_providers); - mutex_unlock(&icc_lock); - dev_dbg(provider->dev, "interconnect provider added to topology\n"); + dev_dbg(provider->dev, "interconnect provider registered\n"); return 0; } -EXPORT_SYMBOL_GPL(icc_provider_add); +EXPORT_SYMBOL_GPL(icc_provider_register); /** - * icc_provider_del() - delete previously added interconnect provider - * @provider: the interconnect provider that will be removed from topology + * icc_provider_deregister() - deregister an interconnect provider + * @provider: the interconnect provider to deregister */ -void icc_provider_del(struct icc_provider *provider) +void icc_provider_deregister(struct icc_provider *provider) { mutex_lock(&icc_lock); WARN_ON(provider->users); - WARN_ON(!list_empty(&provider->nodes)); list_del(&provider->provider_list); mutex_unlock(&icc_lock); } +EXPORT_SYMBOL_GPL(icc_provider_deregister); + +int icc_provider_add(struct icc_provider *provider) +{ + icc_provider_init(provider); + + return icc_provider_register(provider); +} +EXPORT_SYMBOL_GPL(icc_provider_add); + +void icc_provider_del(struct icc_provider *provider) +{ + WARN_ON(!list_empty(&provider->nodes)); + + icc_provider_deregister(provider); +} EXPORT_SYMBOL_GPL(icc_provider_del); static const struct of_device_id __maybe_unused ignore_list[] = { diff --git a/include/linux/interconnect-provider.h b/include/linux/interconnect-provider.h index cd5c5a27557f..d12cd18aab3f 100644 --- a/include/linux/interconnect-provider.h +++ b/include/linux/interconnect-provider.h @@ -122,6 +122,9 @@ int icc_link_destroy(struct icc_node *src, struct icc_node *dst); void icc_node_add(struct icc_node *node, struct icc_provider *provider); void icc_node_del(struct icc_node *node); int icc_nodes_remove(struct icc_provider *provider); +void icc_provider_init(struct icc_provider *provider); +int icc_provider_register(struct icc_provider *provider); +void icc_provider_deregister(struct icc_provider *provider); int icc_provider_add(struct icc_provider *provider); void icc_provider_del(struct icc_provider *provider); struct icc_node_data *of_icc_get_from_provider(struct of_phandle_args *spec); @@ -167,6 +170,15 @@ static inline int icc_nodes_remove(struct icc_provider *provider) return -ENOTSUPP; } +static inline void icc_provider_init(struct icc_provider *provider) { } + +static inline int icc_provider_register(struct icc_provider *provider) +{ + return -ENOTSUPP; +} + +static inline void icc_provider_deregister(struct icc_provider *provider) { } + static inline int icc_provider_add(struct icc_provider *provider) { return -ENOTSUPP;

2 years, 7 months

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FAILED: patch "[PATCH] interconnect: fix icc_provider_del() error handling" failed to apply to 5.4-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 5.4-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.4.y git checkout FETCH_HEAD git cherry-pick -x e0e7089bf9a87bc5e3997422e4e24563424f9018 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '167930394920337(a)kroah.com' --subject-prefix 'PATCH 5.4.y' HEAD^.. Possible dependencies: e0e7089bf9a8 ("interconnect: fix icc_provider_del() error handling") 680f8666baf6 ("interconnect: Make icc_provider_del() return void") 1521e22bfa12 ("interconnect: Introduce xlate_extended() callback") 8a307d3601bc ("interconnect: Export of_icc_get_from_provider()") 1597d453289b ("interconnect: Add of_icc_get_by_index() helper function") 3791163602f7 ("interconnect: Handle memory allocation errors") 05309830e1f8 ("interconnect: Add a name to struct icc_path") dd018a9cf910 ("interconnect: Move internal structs into a separate file") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From e0e7089bf9a87bc5e3997422e4e24563424f9018 Mon Sep 17 00:00:00 2001 From: Johan Hovold <johan+linaro(a)kernel.org> Date: Mon, 6 Mar 2023 08:56:30 +0100 Subject: [PATCH] interconnect: fix icc_provider_del() error handling The interconnect framework currently expects that providers are only removed when there are no users and after all nodes have been removed. There is currently nothing that guarantees this to be the case and the framework does not do any reference counting, but refusing to remove the provider is never correct as that would leave a dangling pointer to a resource that is about to be released in the global provider list (e.g. accessible through debugfs). Replace the current sanity checks with WARN_ON() so that the provider is always removed. Fixes: 11f1ceca7031 ("interconnect: Add generic on-chip interconnect API") Cc: stable(a)vger.kernel.org # 5.1: 680f8666baf6: interconnect: Make icc_provider_del() return void Reviewed-by: Konrad Dybcio <konrad.dybcio(a)linaro.org> Signed-off-by: Johan Hovold <johan+linaro(a)kernel.org> Tested-by: Luca Ceresoli <luca.ceresoli(a)bootlin.com> # i.MX8MP MSC SM2-MB-EP1 Board Link: https://lore.kernel.org/r/20230306075651.2449-3-johan+linaro@kernel.org Signed-off-by: Georgi Djakov <djakov(a)kernel.org> diff --git a/drivers/interconnect/core.c b/drivers/interconnect/core.c index 5217f449eeec..cabb6f5df83e 100644 --- a/drivers/interconnect/core.c +++ b/drivers/interconnect/core.c @@ -1065,18 +1065,8 @@ EXPORT_SYMBOL_GPL(icc_provider_add); void icc_provider_del(struct icc_provider *provider) { mutex_lock(&icc_lock); - if (provider->users) { - pr_warn("interconnect provider still has %d users\n", - provider->users); - mutex_unlock(&icc_lock); - return; - } - - if (!list_empty(&provider->nodes)) { - pr_warn("interconnect provider still has nodes\n"); - mutex_unlock(&icc_lock); - return; - } + WARN_ON(provider->users); + WARN_ON(!list_empty(&provider->nodes)); list_del(&provider->provider_list); mutex_unlock(&icc_lock);

2 years, 7 months

1
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FAILED: patch "[PATCH] interconnect: fix icc_provider_del() error handling" failed to apply to 5.10-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 5.10-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.10.y git checkout FETCH_HEAD git cherry-pick -x e0e7089bf9a87bc5e3997422e4e24563424f9018 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '167930394812570(a)kroah.com' --subject-prefix 'PATCH 5.10.y' HEAD^.. Possible dependencies: e0e7089bf9a8 ("interconnect: fix icc_provider_del() error handling") 680f8666baf6 ("interconnect: Make icc_provider_del() return void") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From e0e7089bf9a87bc5e3997422e4e24563424f9018 Mon Sep 17 00:00:00 2001 From: Johan Hovold <johan+linaro(a)kernel.org> Date: Mon, 6 Mar 2023 08:56:30 +0100 Subject: [PATCH] interconnect: fix icc_provider_del() error handling The interconnect framework currently expects that providers are only removed when there are no users and after all nodes have been removed. There is currently nothing that guarantees this to be the case and the framework does not do any reference counting, but refusing to remove the provider is never correct as that would leave a dangling pointer to a resource that is about to be released in the global provider list (e.g. accessible through debugfs). Replace the current sanity checks with WARN_ON() so that the provider is always removed. Fixes: 11f1ceca7031 ("interconnect: Add generic on-chip interconnect API") Cc: stable(a)vger.kernel.org # 5.1: 680f8666baf6: interconnect: Make icc_provider_del() return void Reviewed-by: Konrad Dybcio <konrad.dybcio(a)linaro.org> Signed-off-by: Johan Hovold <johan+linaro(a)kernel.org> Tested-by: Luca Ceresoli <luca.ceresoli(a)bootlin.com> # i.MX8MP MSC SM2-MB-EP1 Board Link: https://lore.kernel.org/r/20230306075651.2449-3-johan+linaro@kernel.org Signed-off-by: Georgi Djakov <djakov(a)kernel.org> diff --git a/drivers/interconnect/core.c b/drivers/interconnect/core.c index 5217f449eeec..cabb6f5df83e 100644 --- a/drivers/interconnect/core.c +++ b/drivers/interconnect/core.c @@ -1065,18 +1065,8 @@ EXPORT_SYMBOL_GPL(icc_provider_add); void icc_provider_del(struct icc_provider *provider) { mutex_lock(&icc_lock); - if (provider->users) { - pr_warn("interconnect provider still has %d users\n", - provider->users); - mutex_unlock(&icc_lock); - return; - } - - if (!list_empty(&provider->nodes)) { - pr_warn("interconnect provider still has nodes\n"); - mutex_unlock(&icc_lock); - return; - } + WARN_ON(provider->users); + WARN_ON(!list_empty(&provider->nodes)); list_del(&provider->provider_list); mutex_unlock(&icc_lock);

2 years, 7 months

1
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FAILED: patch "[PATCH] interconnect: fix icc_provider_del() error handling" failed to apply to 5.15-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 5.15-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.15.y git checkout FETCH_HEAD git cherry-pick -x e0e7089bf9a87bc5e3997422e4e24563424f9018 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '167930394228174(a)kroah.com' --subject-prefix 'PATCH 5.15.y' HEAD^.. Possible dependencies: e0e7089bf9a8 ("interconnect: fix icc_provider_del() error handling") 680f8666baf6 ("interconnect: Make icc_provider_del() return void") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From e0e7089bf9a87bc5e3997422e4e24563424f9018 Mon Sep 17 00:00:00 2001 From: Johan Hovold <johan+linaro(a)kernel.org> Date: Mon, 6 Mar 2023 08:56:30 +0100 Subject: [PATCH] interconnect: fix icc_provider_del() error handling The interconnect framework currently expects that providers are only removed when there are no users and after all nodes have been removed. There is currently nothing that guarantees this to be the case and the framework does not do any reference counting, but refusing to remove the provider is never correct as that would leave a dangling pointer to a resource that is about to be released in the global provider list (e.g. accessible through debugfs). Replace the current sanity checks with WARN_ON() so that the provider is always removed. Fixes: 11f1ceca7031 ("interconnect: Add generic on-chip interconnect API") Cc: stable(a)vger.kernel.org # 5.1: 680f8666baf6: interconnect: Make icc_provider_del() return void Reviewed-by: Konrad Dybcio <konrad.dybcio(a)linaro.org> Signed-off-by: Johan Hovold <johan+linaro(a)kernel.org> Tested-by: Luca Ceresoli <luca.ceresoli(a)bootlin.com> # i.MX8MP MSC SM2-MB-EP1 Board Link: https://lore.kernel.org/r/20230306075651.2449-3-johan+linaro@kernel.org Signed-off-by: Georgi Djakov <djakov(a)kernel.org> diff --git a/drivers/interconnect/core.c b/drivers/interconnect/core.c index 5217f449eeec..cabb6f5df83e 100644 --- a/drivers/interconnect/core.c +++ b/drivers/interconnect/core.c @@ -1065,18 +1065,8 @@ EXPORT_SYMBOL_GPL(icc_provider_add); void icc_provider_del(struct icc_provider *provider) { mutex_lock(&icc_lock); - if (provider->users) { - pr_warn("interconnect provider still has %d users\n", - provider->users); - mutex_unlock(&icc_lock); - return; - } - - if (!list_empty(&provider->nodes)) { - pr_warn("interconnect provider still has nodes\n"); - mutex_unlock(&icc_lock); - return; - } + WARN_ON(provider->users); + WARN_ON(!list_empty(&provider->nodes)); list_del(&provider->provider_list); mutex_unlock(&icc_lock);

2 years, 7 months

1
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FAILED: patch "[PATCH] serial: 8250: ASPEED_VUART: select REGMAP instead of" failed to apply to 5.10-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 5.10-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.10.y git checkout FETCH_HEAD git cherry-pick -x f8086d1a65ac693e3fd863128352b4b11ee7324d # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '167930359324157(a)kroah.com' --subject-prefix 'PATCH 5.10.y' HEAD^.. Possible dependencies: f8086d1a65ac ("serial: 8250: ASPEED_VUART: select REGMAP instead of depending on it") 806a449725cb ("serial: 8250: SERIAL_8250_ASPEED_VUART should depend on ARCH_ASPEED") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From f8086d1a65ac693e3fd863128352b4b11ee7324d Mon Sep 17 00:00:00 2001 From: Randy Dunlap <rdunlap(a)infradead.org> Date: Sat, 25 Feb 2023 21:39:53 -0800 Subject: [PATCH] serial: 8250: ASPEED_VUART: select REGMAP instead of depending on it REGMAP is a hidden (not user visible) symbol. Users cannot set it directly thru "make *config", so drivers should select it instead of depending on it if they need it. Consistently using "select" or "depends on" can also help reduce Kconfig circular dependency issues. Therefore, change the use of "depends on REGMAP" to "select REGMAP". Fixes: 8d310c9107a2 ("drivers/tty/serial/8250: Make Aspeed VUART SIRQ polarity configurable") Cc: stable <stable(a)kernel.org> Signed-off-by: Randy Dunlap <rdunlap(a)infradead.org> Cc: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> Cc: Oskar Senft <osk(a)google.com> Cc: linux-serial(a)vger.kernel.org Link: https://lore.kernel.org/r/20230226053953.4681-9-rdunlap@infradead.org Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> diff --git a/drivers/tty/serial/8250/Kconfig b/drivers/tty/serial/8250/Kconfig index 978dc196c29b..caeff76e58f2 100644 --- a/drivers/tty/serial/8250/Kconfig +++ b/drivers/tty/serial/8250/Kconfig @@ -257,8 +257,9 @@ config SERIAL_8250_ASPEED_VUART tristate "Aspeed Virtual UART" depends on SERIAL_8250 depends on OF - depends on REGMAP && MFD_SYSCON + depends on MFD_SYSCON depends on ARCH_ASPEED || COMPILE_TEST + select REGMAP help If you want to use the virtual UART (VUART) device on Aspeed BMC platforms, enable this option. This enables the 16550A-

2 years, 7 months

1
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