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Mon, 3 Jul 2023 09:05:12 +0000 Received: from SEZPR06MB5269.apcprd06.prod.outlook.com ([fe80::fa0e:6c06:7474:285c]) by SEZPR06MB5269.apcprd06.prod.outlook.com ([fe80::fa0e:6c06:7474:285c%5]) with mapi id 15.20.6544.024; Mon, 3 Jul 2023 09:05:12 +0000 From: Yangtao Li To: miquel.raynal@bootlin.com, rafael@kernel.org, daniel.lezcano@linaro.org, amitk@kernel.org, rui.zhang@intel.com, mmayer@broadcom.com, bcm-kernel-feedback-list@broadcom.com, florian.fainelli@broadcom.com, tglx@linutronix.de, matthias.bgg@gmail.com, angelogioacchino.delregno@collabora.com, bchihi@baylibre.com, frank.li@vivo.com, wenst@chromium.org Cc: linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org Subject: [PATCH v3 1/5] genirq/devres: Add devm_request_threaded_irq_emsg() Date: Mon, 3 Jul 2023 17:04:50 +0800 Message-Id: <20230703090455.62101-2-frank.li@vivo.com> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230703090455.62101-1-frank.li@vivo.com> References: <20230703090455.62101-1-frank.li@vivo.com> X-ClientProxiedBy: SI1PR02CA0012.apcprd02.prod.outlook.com (2603:1096:4:1f7::8) To SEZPR06MB5269.apcprd06.prod.outlook.com (2603:1096:101:78::6) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SEZPR06MB5269:EE_|PUZPR06MB5850:EE_ X-MS-Office365-Filtering-Correlation-Id: 939e675a-b1de-488c-add5-08db7ba49bcb X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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DIR:OUT; SFP:1102; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: 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 X-OriginatorOrg: vivo.com X-MS-Exchange-CrossTenant-Network-Message-Id: 939e675a-b1de-488c-add5-08db7ba49bcb X-MS-Exchange-CrossTenant-AuthSource: SEZPR06MB5269.apcprd06.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 03 Jul 2023 09:05:12.5184 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 923e42dc-48d5-4cbe-b582-1a797a6412ed X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: 32c+wNU9o3xR85LqHZFsLg4P0BXzvlk84uVlv45dzVUAAXx8lG0p5zJblo1Zzo+eKmRFR6XUaTcI6C3v97TWmg== X-MS-Exchange-Transport-CrossTenantHeadersStamped: PUZPR06MB5850 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org There are more than 700 calls to the devm_request_threaded_irq method. Most drivers only request one interrupt resource, and these error messages are basically the same. If error messages are printed everywhere, more than 1000 lines of code can be saved by removing the msg in the driver. And tglx point out that: If we actually look at the call sites of devm_request_threaded_irq() then the vast majority of them print more or less lousy error messages. A quick grep/sed/awk/sort/uniq revealed 519 messages total (there are probably more) 352 unique messages 323 unique messages after lower casing Those 323 are mostly just variants of the same patterns with slight modifications in formatting and information provided. 186 of these messages do not deliver any useful information, e.g. "no irq", " The most useful one of all is: "could request wakeup irq: %d" So there is certainly an argument to be made that this particular function should print a well formatted and informative error message. It's not a general allocator like kmalloc(). It's specialized and in the vast majority of cases failing to request the interrupt causes the device probe to fail. So having proper and consistent information why the device cannot be used _is_ useful. So add devm_request_threaded_irq_emsg(), which ensure that all error handling branches print error information. In this way, when this function fails, the upper-layer functions can directly return an error code without missing debugging information. Otherwise, the error message will be printed redundantly or missing. Cc: Thomas Gleixner Signed-off-by: Yangtao Li --- include/linux/interrupt.h | 6 ++++++ kernel/irq/devres.c | 42 +++++++++++++++++++++++++++++++++++++++ 2 files changed, 48 insertions(+) diff --git a/include/linux/interrupt.h b/include/linux/interrupt.h index a92bce40b04b..cde034006e3e 100644 --- a/include/linux/interrupt.h +++ b/include/linux/interrupt.h @@ -201,6 +201,12 @@ extern void free_percpu_nmi(unsigned int irq, void __percpu *percpu_dev_id); struct device; +extern int __must_check +devm_request_threaded_irq_emsg(struct device *dev, unsigned int irq, + irq_handler_t handler, irq_handler_t thread_fn, + unsigned long irqflags, const char *devname, + void *dev_id, const char *emsg); + extern int __must_check devm_request_threaded_irq(struct device *dev, unsigned int irq, irq_handler_t handler, irq_handler_t thread_fn, diff --git a/kernel/irq/devres.c b/kernel/irq/devres.c index f6e5515ee077..f2e669ccd5d4 100644 --- a/kernel/irq/devres.c +++ b/kernel/irq/devres.c @@ -79,6 +79,48 @@ int devm_request_threaded_irq(struct device *dev, unsigned int irq, } EXPORT_SYMBOL(devm_request_threaded_irq); +/** + * devm_request_threaded_irq_emsg - allocate an interrupt line for a managed device + * @dev: device to request interrupt for + * @irq: Interrupt line to allocate + * @handler: Function to be called when the IRQ occurs + * @thread_fn: function to be called in a threaded interrupt context. NULL + * for devices which handle everything in @handler + * @irqflags: Interrupt type flags + * @devname: An ascii name for the claiming device, dev_name(dev) if NULL + * @dev_id: A cookie passed back to the handler function + * @emsg: Optional additional error log + * + * This is a variant of the devm_request_threaded_irq function. + * It will print an error message by default when the request fails, + * and the consumer can add a special error msg. + * + * Except for the extra @dev argument, this function takes the + * same arguments and performs the same function as + * request_threaded_irq(). IRQs requested with this function will be + * automatically freed on driver detach. + * + * If an IRQ allocated with this function needs to be freed + * separately, devm_free_irq() must be used. + */ +int devm_request_threaded_irq_emsg(struct device *dev, unsigned int irq, + irq_handler_t handler, irq_handler_t thread_fn, + unsigned long irqflags, const char *devname, + void *dev_id, const char *emsg) +{ + int rc; + + rc = devm_request_threaded_irq(dev, irq, handler, NULL, irqflags, + devname, dev_id); + if (rc && rc != -EPROBE_DEFER) { + dev_err(dev, "Failed to request %sinterrupt %u %s %s: %pe\n", + thread_fn ? "threaded " : "", irq, devname ? : dev_name(dev), + emsg ? : "", ERR_PTR(rc)); + } + return rc; +} +EXPORT_SYMBOL(devm_request_threaded_irq_emsg); + /** * devm_request_any_context_irq - allocate an interrupt line for a managed device * @dev: device to request interrupt for From patchwork Mon Jul 3 09:04:51 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?b?5p2O5oms6Z+s?= X-Patchwork-Id: 698904 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1AD95EB64DC for ; Mon, 3 Jul 2023 09:05:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230437AbjGCJFY (ORCPT ); Mon, 3 Jul 2023 05:05:24 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53418 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230427AbjGCJFT (ORCPT ); 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DIR:OUT; SFP:1102; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: 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 X-OriginatorOrg: vivo.com X-MS-Exchange-CrossTenant-Network-Message-Id: 2f992d0f-f8c4-4004-d595-08db7ba49e39 X-MS-Exchange-CrossTenant-AuthSource: SEZPR06MB5269.apcprd06.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 03 Jul 2023 09:05:16.3937 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 923e42dc-48d5-4cbe-b582-1a797a6412ed X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: dZObO4O8x2rUclmcAgKQuQL8xHcnirv4twVGlqw21q5Z5YlkeeNI3PNZSCJoili8A0OvWqui4MNBCZDC2nQUqQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: PUZPR06MB5850 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org There are more than 700 calls to the devm_request_threaded_irq method. Most drivers only request one interrupt resource, and these error messages are basically the same. If error messages are printed everywhere, more than 1000 lines of code can be saved by removing the msg in the driver. And tglx point out that: If we actually look at the call sites of devm_request_threaded_irq() then the vast majority of them print more or less lousy error messages. A quick grep/sed/awk/sort/uniq revealed 519 messages total (there are probably more) 352 unique messages 323 unique messages after lower casing Those 323 are mostly just variants of the same patterns with slight modifications in formatting and information provided. 186 of these messages do not deliver any useful information, e.g. "no irq", " The most useful one of all is: "could request wakeup irq: %d" So there is certainly an argument to be made that this particular function should print a well formatted and informative error message. It's not a general allocator like kmalloc(). It's specialized and in the vast majority of cases failing to request the interrupt causes the device probe to fail. So having proper and consistent information why the device cannot be used _is_ useful. Let's use devm_request_threaded_irq_emsg(), which ensure that all error handling branches print error information. In this way, when this function fails, the upper-layer functions can directly return an error code without missing debugging information. Otherwise, the error message will be printed redundantly or missing. Cc: Thomas Gleixner Signed-off-by: Yangtao Li Acked-by: Miquel Raynal --- drivers/thermal/armada_thermal.c | 13 +++++-------- 1 file changed, 5 insertions(+), 8 deletions(-) diff --git a/drivers/thermal/armada_thermal.c b/drivers/thermal/armada_thermal.c index 9f6dc4fc9112..a5e140643f00 100644 --- a/drivers/thermal/armada_thermal.c +++ b/drivers/thermal/armada_thermal.c @@ -913,15 +913,12 @@ static int armada_thermal_probe(struct platform_device *pdev) /* The overheat interrupt feature is not mandatory */ if (irq > 0) { - ret = devm_request_threaded_irq(&pdev->dev, irq, - armada_overheat_isr, - armada_overheat_isr_thread, - 0, NULL, priv); - if (ret) { - dev_err(&pdev->dev, "Cannot request threaded IRQ %d\n", - irq); + ret = devm_request_threaded_irq_emsg(&pdev->dev, irq, + armada_overheat_isr, + armada_overheat_isr_thread, + 0, NULL, priv, NULL); + if (ret) return ret; - } } /* From patchwork Mon Jul 3 09:04:52 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?b?5p2O5oms6Z+s?= X-Patchwork-Id: 699511 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id C9DEEEB64DD for ; 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DIR:OUT; SFP:1102; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: oT5inER2najQLvCMYbWkikHhuwutwgBxoHeK/QhkGul7lV0EdR4b26pmYzMEboLC3QVRgOz5C50VUJmeqtK1jbl6Sw/Tz0cmNBHeWEDrkVCWfv1Q4SFkXE7ScxclEsbDRnSNF5xhutjEjKWNdoOn4xNhhy3WYpNxbhj806ggXb7Qx3kYL77L5BOTkAWGdhmQqEgNihpspWyLHjI3zHh/DhvrHDYx/PHOwuXyNS2Q1PfMsYeQSu7I8xZuPiHttoqvztZDMcoikvaOqxtdx09dP/ojWuTQES6mOeJ4jgKnZ9mibmsKwrJg7ktukX4KOTMq1ImgBsqKm/QEN/lDOV+I/73rMukLOfIf/VTKASH8AYu0XdmoSk8wf5Yum5cM0e4HwV2Y2YxDb03M4a0L+VveRcxpAJyYds+wmu4PuXkpBqVvCKzmJAwL4QPJHbUntbn2+b80D2v8tGge5QDi4nDyQY4Js+lKhjwUatf/QPSL1vQCyiAiwqUpI7x6Fttj7pt55pFR2NooCxpOwdeGaV7rwhIsfiE7FToiFjh0IEfc0YE2XpSF6lyLGdzyTTDp5PJB9+IAy1TH0svM6lXzJ6zTltTtSjLeBkFh0/5g3QsbD5yykWByYsW5Ghui4UFImLyuYunJVT8tX/C63CPXsTnUnMbdhSQ0exQTygABZjHg6Xp9DUZY1dob1Ouu4PE09LYs87TAqYIU8Ae5/e4KaUenFMCGQzgpjsqNy8M6TisUGX+JX/IAI+MpLqGmMyZi6ydbzFGaGRLvyDkZgw5XGT2guKzEoSV4lCeIMflt8rp14L7mek4UG6r9FP12FYclyAIxSFOwGP8LZe52/KooDTuwBkoXNbL1h3YyT0xdfwDVUzvUvCyDjw/+x0q5xPMCju3bC495hkhYxALKd6GcBiy6ZKghBzhIj2QkqiGLc1FyVlXyEQGzw604MDbvP7THI45ls26p61GIZk1aePHNAz40roKoXwrf18630OjW50zPItl0mAq4oA1xhykG/FqIgmbNA2U6nD1Xrc+HoHaVJE06J0IRFzzv9941ZpoaihEdxpCuGiVEQL9t4Q2fuxEpDcIESbj5FNhGFhSscUog2lWYl3FASzqduyDI34H2JLrpvWnB0y98EBoEcAWpfDfwvR+EFg+OlqXihUHIK9OC4NN/IzlheWVhEAARrK6dH+cU6PTUP1gFwLamanKiX5cNnqj7kLtUONapS5m8GUnW4VUvSvbDthwJko/Oybg3n0DuAtylGuBsnh+xz4TV3y1zIRO9tVqFYe3HnjOgGEOGCCSEYO7Mf/7y/LSXKx/wb+SrLEBqUzQsWL+x/SGGVCEEZtOQWgqopzCl3eCI7tnzpaLscZiOFB0xkKvehcu+SRzhzjG8WzvL1Utpz8GhnLjEnI6xmPK2d23T319e4OEUkqp8NImaUqseW3qdoQ2aS4jV+Vzv2ozHQRegUe7IMlwiL5CqKVMmD3s3PeyPBnnJ5ZonpNhp4TMgDHF3QIFrw7Wlsn3WYUKQqSQhUx7lfKA7OhQvb9f6H2n7gcmQPP62Ai5hnoU+38wUFYehZ5P3VWjNoFFI3i8wEgBYvwqPMC40d10n X-OriginatorOrg: vivo.com X-MS-Exchange-CrossTenant-Network-Message-Id: cb4debbc-50ed-40a1-e24a-08db7ba4a024 X-MS-Exchange-CrossTenant-AuthSource: SEZPR06MB5269.apcprd06.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 03 Jul 2023 09:05:19.6754 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 923e42dc-48d5-4cbe-b582-1a797a6412ed X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: jaTWDdYIbLZPEIKG6nobFYOCDku0KWUF+xio7zu9TMvU9HeePauAqDou/SbhN8HR1qJIQiW+O5Rjdv7S3VqLhw== X-MS-Exchange-Transport-CrossTenantHeadersStamped: PUZPR06MB5850 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org There are more than 700 calls to the devm_request_threaded_irq method. Most drivers only request one interrupt resource, and these error messages are basically the same. If error messages are printed everywhere, more than 1000 lines of code can be saved by removing the msg in the driver. And tglx point out that: If we actually look at the call sites of devm_request_threaded_irq() then the vast majority of them print more or less lousy error messages. A quick grep/sed/awk/sort/uniq revealed 519 messages total (there are probably more) 352 unique messages 323 unique messages after lower casing Those 323 are mostly just variants of the same patterns with slight modifications in formatting and information provided. 186 of these messages do not deliver any useful information, e.g. "no irq", " The most useful one of all is: "could request wakeup irq: %d" So there is certainly an argument to be made that this particular function should print a well formatted and informative error message. It's not a general allocator like kmalloc(). It's specialized and in the vast majority of cases failing to request the interrupt causes the device probe to fail. So having proper and consistent information why the device cannot be used _is_ useful. Let's use devm_request_threaded_irq_emsg(), which ensure that all error handling branches print error information. In this way, when this function fails, the upper-layer functions can directly return an error code without missing debugging information. Otherwise, the error message will be printed redundantly or missing. Cc: Thomas Gleixner Signed-off-by: Yangtao Li --- drivers/thermal/broadcom/brcmstb_thermal.c | 12 +++++------- 1 file changed, 5 insertions(+), 7 deletions(-) diff --git a/drivers/thermal/broadcom/brcmstb_thermal.c b/drivers/thermal/broadcom/brcmstb_thermal.c index 72d1dbe60b8f..b922f8278f62 100644 --- a/drivers/thermal/broadcom/brcmstb_thermal.c +++ b/drivers/thermal/broadcom/brcmstb_thermal.c @@ -349,14 +349,12 @@ static int brcmstb_thermal_probe(struct platform_device *pdev) irq = platform_get_irq_optional(pdev, 0); if (irq >= 0) { - ret = devm_request_threaded_irq(&pdev->dev, irq, NULL, - brcmstb_tmon_irq_thread, - IRQF_ONESHOT, - DRV_NAME, priv); - if (ret < 0) { - dev_err(&pdev->dev, "could not request IRQ: %d\n", ret); + ret = devm_request_threaded_irq_emsg(&pdev->dev, irq, NULL, + brcmstb_tmon_irq_thread, + IRQF_ONESHOT, + DRV_NAME, priv, NULL); + if (ret < 0) return ret; - } } dev_info(&pdev->dev, "registered AVS TMON of-sensor driver\n"); From patchwork Mon Jul 3 09:04:53 2023 Content-Type: text/plain; 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Mon, 3 Jul 2023 09:05:23 +0000 Received: from SEZPR06MB5269.apcprd06.prod.outlook.com ([fe80::fa0e:6c06:7474:285c]) by SEZPR06MB5269.apcprd06.prod.outlook.com ([fe80::fa0e:6c06:7474:285c%5]) with mapi id 15.20.6544.024; Mon, 3 Jul 2023 09:05:23 +0000 From: Yangtao Li To: miquel.raynal@bootlin.com, rafael@kernel.org, daniel.lezcano@linaro.org, amitk@kernel.org, rui.zhang@intel.com, mmayer@broadcom.com, bcm-kernel-feedback-list@broadcom.com, florian.fainelli@broadcom.com, tglx@linutronix.de, matthias.bgg@gmail.com, angelogioacchino.delregno@collabora.com, bchihi@baylibre.com, frank.li@vivo.com, wenst@chromium.org Cc: linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org Subject: [PATCH v3 4/5] thermal/drivers/db8500: convert to use devm_request_threaded_irq_emsg() Date: Mon, 3 Jul 2023 17:04:53 +0800 Message-Id: <20230703090455.62101-5-frank.li@vivo.com> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230703090455.62101-1-frank.li@vivo.com> References: <20230703090455.62101-1-frank.li@vivo.com> X-ClientProxiedBy: SI1PR02CA0012.apcprd02.prod.outlook.com (2603:1096:4:1f7::8) To SEZPR06MB5269.apcprd06.prod.outlook.com (2603:1096:101:78::6) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SEZPR06MB5269:EE_|PUZPR06MB5850:EE_ X-MS-Office365-Filtering-Correlation-Id: e3b6ce06-857e-4cf1-3656-08db7ba4a25c X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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DIR:OUT; SFP:1102; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: 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 X-OriginatorOrg: vivo.com X-MS-Exchange-CrossTenant-Network-Message-Id: e3b6ce06-857e-4cf1-3656-08db7ba4a25c X-MS-Exchange-CrossTenant-AuthSource: SEZPR06MB5269.apcprd06.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 03 Jul 2023 09:05:23.3811 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 923e42dc-48d5-4cbe-b582-1a797a6412ed X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: Ia5KjdP2DcibX+OQfXajaZcmbnsMZSWQoZSALUqh9pSzt8xMLisDOSUv96O6PHdm4/P2vSkID24pOLMK6AuqfQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: PUZPR06MB5850 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org There are more than 700 calls to the devm_request_threaded_irq method. Most drivers only request one interrupt resource, and these error messages are basically the same. If error messages are printed everywhere, more than 1000 lines of code can be saved by removing the msg in the driver. And tglx point out that: If we actually look at the call sites of devm_request_threaded_irq() then the vast majority of them print more or less lousy error messages. A quick grep/sed/awk/sort/uniq revealed 519 messages total (there are probably more) 352 unique messages 323 unique messages after lower casing Those 323 are mostly just variants of the same patterns with slight modifications in formatting and information provided. 186 of these messages do not deliver any useful information, e.g. "no irq", " The most useful one of all is: "could request wakeup irq: %d" So there is certainly an argument to be made that this particular function should print a well formatted and informative error message. It's not a general allocator like kmalloc(). It's specialized and in the vast majority of cases failing to request the interrupt causes the device probe to fail. So having proper and consistent information why the device cannot be used _is_ useful. Let's use devm_request_threaded_irq_emsg(), which ensure that all error handling branches print error information. In this way, when this function fails, the upper-layer functions can directly return an error code without missing debugging information. Otherwise, the error message will be printed redundantly or missing. Cc: Thomas Gleixner Signed-off-by: Yangtao Li --- drivers/thermal/db8500_thermal.c | 16 ++++++---------- 1 file changed, 6 insertions(+), 10 deletions(-) diff --git a/drivers/thermal/db8500_thermal.c b/drivers/thermal/db8500_thermal.c index fca5c2c93bf9..195caf954aca 100644 --- a/drivers/thermal/db8500_thermal.c +++ b/drivers/thermal/db8500_thermal.c @@ -164,25 +164,21 @@ static int db8500_thermal_probe(struct platform_device *pdev) if (low_irq < 0) return low_irq; - ret = devm_request_threaded_irq(dev, low_irq, NULL, + ret = devm_request_threaded_irq_emsg(dev, low_irq, NULL, prcmu_low_irq_handler, IRQF_NO_SUSPEND | IRQF_ONESHOT, - "dbx500_temp_low", th); - if (ret < 0) { - dev_err(dev, "failed to allocate temp low irq\n"); + "dbx500_temp_low", th, "temp low"); + if (ret < 0) return ret; - } high_irq = platform_get_irq_byname(pdev, "IRQ_HOTMON_HIGH"); if (high_irq < 0) return high_irq; - ret = devm_request_threaded_irq(dev, high_irq, NULL, + ret = devm_request_threaded_irq_emsg(dev, high_irq, NULL, prcmu_high_irq_handler, IRQF_NO_SUSPEND | IRQF_ONESHOT, - "dbx500_temp_high", th); - if (ret < 0) { - dev_err(dev, "failed to allocate temp high irq\n"); + "dbx500_temp_high", th, "temp high"); + if (ret < 0) return ret; - } /* register of thermal sensor and get info from DT */ th->tz = devm_thermal_of_zone_register(dev, 0, th, &thdev_ops); From patchwork Mon Jul 3 09:04:54 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?b?5p2O5oms6Z+s?= X-Patchwork-Id: 699510 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id CB828EB64DC for ; Mon, 3 Jul 2023 09:05:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230465AbjGCJFu (ORCPT ); Mon, 3 Jul 2023 05:05:50 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53464 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231167AbjGCJFr (ORCPT ); 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Received: from SEZPR06MB5269.apcprd06.prod.outlook.com (2603:1096:101:78::6) by KL1PR0601MB4003.apcprd06.prod.outlook.com (2603:1096:820:26::6) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6544.24; Mon, 3 Jul 2023 09:05:27 +0000 Received: from SEZPR06MB5269.apcprd06.prod.outlook.com ([fe80::fa0e:6c06:7474:285c]) by SEZPR06MB5269.apcprd06.prod.outlook.com ([fe80::fa0e:6c06:7474:285c%5]) with mapi id 15.20.6544.024; Mon, 3 Jul 2023 09:05:26 +0000 From: Yangtao Li To: miquel.raynal@bootlin.com, rafael@kernel.org, daniel.lezcano@linaro.org, amitk@kernel.org, rui.zhang@intel.com, mmayer@broadcom.com, bcm-kernel-feedback-list@broadcom.com, florian.fainelli@broadcom.com, tglx@linutronix.de, matthias.bgg@gmail.com, angelogioacchino.delregno@collabora.com, bchihi@baylibre.com, frank.li@vivo.com, wenst@chromium.org Cc: linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org Subject: [PATCH v3 5/5] thermal/drivers/mediatek/lvts_thermal: convert to use devm_request_threaded_irq_emsg() Date: Mon, 3 Jul 2023 17:04:54 +0800 Message-Id: <20230703090455.62101-6-frank.li@vivo.com> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230703090455.62101-1-frank.li@vivo.com> References: <20230703090455.62101-1-frank.li@vivo.com> X-ClientProxiedBy: SI1PR02CA0012.apcprd02.prod.outlook.com (2603:1096:4:1f7::8) To SEZPR06MB5269.apcprd06.prod.outlook.com (2603:1096:101:78::6) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SEZPR06MB5269:EE_|KL1PR0601MB4003:EE_ X-MS-Office365-Filtering-Correlation-Id: 48f740ee-ed59-4742-b9e8-08db7ba4a43d X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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DIR:OUT; SFP:1102; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: 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 X-OriginatorOrg: vivo.com X-MS-Exchange-CrossTenant-Network-Message-Id: 48f740ee-ed59-4742-b9e8-08db7ba4a43d X-MS-Exchange-CrossTenant-AuthSource: SEZPR06MB5269.apcprd06.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 03 Jul 2023 09:05:26.4851 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 923e42dc-48d5-4cbe-b582-1a797a6412ed X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: m2rcRdXB5EyvNvlrVkT4GGC42c2jeCicjYzruu3+zMsy0AFDjdSPTPfQL4Ep46p5/iYPGhL6EaqFoXP5N6bA+w== X-MS-Exchange-Transport-CrossTenantHeadersStamped: KL1PR0601MB4003 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org There are more than 700 calls to the devm_request_threaded_irq method. Most drivers only request one interrupt resource, and these error messages are basically the same. If error messages are printed everywhere, more than 1000 lines of code can be saved by removing the msg in the driver. And tglx point out that: If we actually look at the call sites of devm_request_threaded_irq() then the vast majority of them print more or less lousy error messages. A quick grep/sed/awk/sort/uniq revealed 519 messages total (there are probably more) 352 unique messages 323 unique messages after lower casing Those 323 are mostly just variants of the same patterns with slight modifications in formatting and information provided. 186 of these messages do not deliver any useful information, e.g. "no irq", " The most useful one of all is: "could request wakeup irq: %d" So there is certainly an argument to be made that this particular function should print a well formatted and informative error message. It's not a general allocator like kmalloc(). It's specialized and in the vast majority of cases failing to request the interrupt causes the device probe to fail. So having proper and consistent information why the device cannot be used _is_ useful. Let's use devm_request_threaded_irq_emsg(), which ensure that all error handling branches print error information. In this way, when this function fails, the upper-layer functions can directly return an error code without missing debugging information. Otherwise, the error message will be printed redundantly or missing. Cc: Thomas Gleixner Signed-off-by: Yangtao Li --- drivers/thermal/mediatek/lvts_thermal.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/thermal/mediatek/lvts_thermal.c b/drivers/thermal/mediatek/lvts_thermal.c index b693fac2d677..b6403bf2300f 100644 --- a/drivers/thermal/mediatek/lvts_thermal.c +++ b/drivers/thermal/mediatek/lvts_thermal.c @@ -1148,10 +1148,10 @@ static int lvts_probe(struct platform_device *pdev) * At this point the LVTS is initialized and enabled. We can * safely enable the interrupt. */ - ret = devm_request_threaded_irq(dev, irq, NULL, lvts_irq_handler, - IRQF_ONESHOT, dev_name(dev), lvts_td); + ret = devm_request_threaded_irq_emsg(dev, irq, NULL, lvts_irq_handler, + IRQF_ONESHOT, dev_name(dev), lvts_td, NULL); if (ret) - return dev_err_probe(dev, ret, "Failed to request interrupt\n"); + return ret; platform_set_drvdata(pdev, lvts_td);