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[62.78.225.252]) by smtp.gmail.com with ESMTPSA id x17-20020ac25dd1000000b004f155743899sm1386872lfq.92.2023.05.12.00.53.03 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 12 May 2023 00:53:04 -0700 (PDT) Date: Fri, 12 May 2023 10:53:00 +0300 From: Matti Vaittinen To: Matti Vaittinen , Matti Vaittinen Cc: Andy Shevchenko , Daniel Scally , Heikki Krogerus , Sakari Ailus , Greg Kroah-Hartman , "Rafael J. Wysocki" , Wolfram Sang , Matti Vaittinen , Jonathan Cameron , Lars-Peter Clausen , Akhil R , linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org, linux-i2c@vger.kernel.org, linux-iio@vger.kernel.org Subject: [PATCH v3 1/3] drivers: fwnode: fix fwnode_irq_get_byname() Message-ID: <9dd75817886fbb2a0cc58e2248dbba52d8a6d908.1683875389.git.mazziesaccount@gmail.com> References: MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FREEMAIL_FROM, RCVD_IN_DNSWL_NONE,SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1765674203501864608?= X-GMAIL-MSGID: =?utf-8?q?1765674203501864608?= The fwnode_irq_get_byname() does return 0 upon device-tree IRQ mapping failure. This is contradicting the function documentation and can potentially be a source of errors like: int probe(...) { ... irq = fwnode_irq_get_byname(); if (irq <= 0) return irq; ... } Here we do correctly check the return value from fwnode_irq_get_byname() but the driver probe will now return success. (There was already one such user in-tree). Change the fwnode_irq_get_byname() to work as documented and according to the common convention and abd always return a negative errno upon failure. Fixes: ca0acb511c21 ("device property: Add fwnode_irq_get_byname") Suggested-by: Sakari Ailus Reviewed-by: Sakari Ailus Reviewed-by: Andy Shevchenko Signed-off-by: Matti Vaittinen --- drivers/base/property.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/drivers/base/property.c b/drivers/base/property.c index f6117ec9805c..a3b95d2d781f 100644 --- a/drivers/base/property.c +++ b/drivers/base/property.c @@ -1011,7 +1011,7 @@ EXPORT_SYMBOL(fwnode_irq_get); */ int fwnode_irq_get_byname(const struct fwnode_handle *fwnode, const char *name) { - int index; + int index, ret; if (!name) return -EINVAL; @@ -1020,7 +1020,12 @@ int fwnode_irq_get_byname(const struct fwnode_handle *fwnode, const char *name) if (index < 0) return index; - return fwnode_irq_get(fwnode, index); + ret = fwnode_irq_get(fwnode, index); + /* We treat mapping errors as invalid case */ + if (ret == 0) + return -EINVAL; + + return ret; } EXPORT_SYMBOL(fwnode_irq_get_byname); From patchwork Fri May 12 07:53:25 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Matti Vaittinen X-Patchwork-Id: 92987 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a59:b0ea:0:b0:3b6:4342:cba0 with SMTP id b10csp4926372vqo; Fri, 12 May 2023 01:04:05 -0700 (PDT) X-Google-Smtp-Source: ACHHUZ4/fBXk6GW2gfHreBg6mDcgbiZgS98vEJADXqXB96QJxRqTeUprOm4p190ojl5uYWpKv5vb X-Received: by 2002:a05:6a20:7489:b0:f2:9378:814a with SMTP id p9-20020a056a20748900b000f29378814amr30384773pzd.49.1683878644768; Fri, 12 May 2023 01:04:04 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1683878644; cv=none; d=google.com; s=arc-20160816; b=tovY7svkLu5O0j/Z+Rn8sGRLmPgzgoO32qV+hfwXZiXpuaYgAMXWC0EsKyXsvkAtSY FMddbYOSwPWZjga2P15aTAPUhkHsn07lMTE+bbzXQ/zpOSJgtMyzJvpIXAiBjDu8uvVq 8ihceSoInLeJm+gS9zBSC0MHVQ193Q/iRCf4zsfbTnLuyLJ+34thrnC6RPNOwfQ/aM7L BTokbhn2OeS3s/TzM7TwId9qSUQiG3alWDbXEBkcG8bW5txZKcxxv2qbOY8wxxBKkHIZ dWReDl4CbZAZ7jx7f9u9hL2l4Qib9CsUUrWhBfdL3gIicuBPOPwMfX/BcaICOzLr2blw oojA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:in-reply-to:content-disposition:mime-version :references:message-id:subject:cc:to:from:date:dkim-signature; bh=r+fkvnw5qJK8Z9ZsEdDbVAibOHT/dgf1NL+n5A0kE4I=; b=o7EJjCgZ+edm16N8pMKcaoLaM1Zh3E010Ssr6oqUkn/+U93leGeH0sddC1a2u7+3Kf MezwdEGeYz9j39YC6LE8/Draajrz+Exps/tEC3kUJstL4dSBTnDAZzG53btqMr2i49wJ 6OVfko3H8YqHLzAGLVCG2fQ/08QrKyh3/5dqVDi0kMc3wX678sqrto7NSp5v78Yl/MOV 1f2TOXVTRnIINF2/FFWOSv0jYf73ozOrncqwVFVynjuHohklPL9bbPMiEg5PjJl7r32V jahJlOf/zOa2wljS0x0xS8L0xDDSmXB4TOMekEZ9BuVx0nHQwaAmszCQHIbuTa8IMrY2 rudA== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@gmail.com header.s=20221208 header.b=P2el5kc0; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com Received: from out1.vger.email (out1.vger.email. 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[62.78.225.252]) by smtp.gmail.com with ESMTPSA id l18-20020a05651c10d200b002aa4713b925sm2691194ljn.21.2023.05.12.00.53.28 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 12 May 2023 00:53:29 -0700 (PDT) Date: Fri, 12 May 2023 10:53:25 +0300 From: Matti Vaittinen To: Matti Vaittinen , Matti Vaittinen Cc: Andy Shevchenko , Daniel Scally , Heikki Krogerus , Sakari Ailus , Greg Kroah-Hartman , "Rafael J. Wysocki" , Wolfram Sang , Matti Vaittinen , Jonathan Cameron , Lars-Peter Clausen , Akhil R , linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org, linux-i2c@vger.kernel.org, linux-iio@vger.kernel.org Subject: [PATCH v3 2/3] i2c: i2c-smbus: fwnode_irq_get_byname() return value fix Message-ID: References: MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FREEMAIL_FROM, RCVD_IN_DNSWL_NONE,SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1765674733922941328?= X-GMAIL-MSGID: =?utf-8?q?1765674733922941328?= The fwnode_irq_get_byname() was changed to not return 0 upon failure so return value check can be adjusted to reflect the change. Reviewed-by: Sakari Ailus Reviewed-by: Andy Shevchenko Signed-off-by: Matti Vaittinen --- Depends on the mentioned return value change which is in patch 1/2. The return value change does also cause a functional change here. Eg. when IRQ mapping fails, the fwnode_irq_get_byname() no longer returns zero. This will cause also the probe here to return nonzero failure. I guess this is desired behaviour - but I would appreciate any confirmation. Please, see also previous discussion here: https://lore.kernel.org/all/fbd52f5f5253b382b8d7b3e8046134de29f965b8.1666710197.git.mazziesaccount@gmail.com/ Another suggestion has been to drop the check altogether. I am slightly reluctant on doing that unless it gets confirmed that is the "right thing to do". --- drivers/i2c/i2c-smbus.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/i2c/i2c-smbus.c b/drivers/i2c/i2c-smbus.c index 138c3f5e0093..893fe7cd3e41 100644 --- a/drivers/i2c/i2c-smbus.c +++ b/drivers/i2c/i2c-smbus.c @@ -129,7 +129,7 @@ static int smbalert_probe(struct i2c_client *ara) } else { irq = fwnode_irq_get_byname(dev_fwnode(adapter->dev.parent), "smbus_alert"); - if (irq <= 0) + if (irq < 0) return irq; } From patchwork Fri May 12 07:53:41 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Matti Vaittinen X-Patchwork-Id: 92986 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a59:b0ea:0:b0:3b6:4342:cba0 with SMTP id b10csp4922496vqo; Fri, 12 May 2023 00:55:57 -0700 (PDT) X-Google-Smtp-Source: ACHHUZ6FoAk3zIH5H6puFOoAoEedXQ9yrhVhoagKZpcuC73v8V+5YAE6Y12bQX/S86wimauRLMLz X-Received: by 2002:a05:6a20:9191:b0:f5:e534:3e52 with SMTP id v17-20020a056a20919100b000f5e5343e52mr33120101pzd.37.1683878156744; Fri, 12 May 2023 00:55:56 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1683878156; cv=none; d=google.com; s=arc-20160816; b=DQML7Hb6UyKrfy9KvGfaoFYHW+3e6w/H/YEkIh7O6JX3uS9xwONWdygi4NJRM6I0Uc dZpuXFAfqAvieIicfwYTpaiMLmPiPtqVNjLBukAkWfU6RrThWUU73n+KY+GpR1YusxIX 5X+mwEU1nu4sC2dvM3mnvtPbIaDu3M1s7tteGycnHMhTtgx2lmBMceaVTLzf2HsIYWg5 QlbagVMGLIUjy8DcskFoZJhcUgikZYwqgFpvdmd4dyWbhkUVCIDrz8dT4Y9AHL1lr40k 6mcjqAZcjxU0M65xG4QizWJpdL10j7AdBLUuffOsQB55Y2AAR4zd9F9kAySaPI650486 i7IA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:in-reply-to:content-disposition:mime-version :references:message-id:subject:cc:to:from:date:dkim-signature; bh=UamIyRZFBw0Clb1Qm1i1FDtoVxcrvBBxLqTrmWJ4kUM=; b=N1+nkWvgO16ZRSaJzO8xOzVPdBGymx6eXS2GJe3HU4u1QmqNBaqI0EqiC9yWEMLvj/ t/uRGlKlDJG7KHutdqWul9YypdZZp8mqouu2YQgumo83NMuhn5ufb8xsg3QdCASu4IHw fNX1pfa8/diFz56/zBHl/oRxa1bQvtxkrriqAD5R9Q6U0I4Ss4+GoAIjypnQ3LTsmBWC xmxpo4BOocGY9Nfp9arJrNvI7C9Nuih3A+Uec9iU1lgRYPV1Ftgojynx3K9vJpAD4K5g sqdDKn0/zUKyGvd+cjzzYbzpVSXaK0GXLY/shcvyfnioGewcZJ+X2NLJKGJPvjFobg9g 2AqQ== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@gmail.com header.s=20221208 header.b=D8Nfc850; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com Received: from out1.vger.email (out1.vger.email. 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[62.78.225.252]) by smtp.gmail.com with ESMTPSA id z12-20020a19f70c000000b004db3d57c3a8sm1383610lfe.96.2023.05.12.00.53.43 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 12 May 2023 00:53:44 -0700 (PDT) Date: Fri, 12 May 2023 10:53:41 +0300 From: Matti Vaittinen To: Matti Vaittinen , Matti Vaittinen Cc: Andy Shevchenko , Daniel Scally , Heikki Krogerus , Sakari Ailus , Greg Kroah-Hartman , "Rafael J. Wysocki" , Wolfram Sang , Matti Vaittinen , Jonathan Cameron , Lars-Peter Clausen , Akhil R , linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org, linux-i2c@vger.kernel.org, linux-iio@vger.kernel.org Subject: [PATCH v3 3/3] iio: kx022a fix irq getting Message-ID: References: MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FREEMAIL_FROM, RCVD_IN_DNSWL_NONE,SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1765674221650391718?= X-GMAIL-MSGID: =?utf-8?q?1765674221650391718?= The fwnode_irq_get_byname() was returning 0 at device-tree mapping error. If this occurred, the KX022A driver did abort the probe but errorneously directly returned the return value from fwnode_irq_get_byname() from probe. In case of a device-tree mapping error this indicated success. The fwnode_irq_get_byname() has since been fixed to not return zero on error so the check for fwnode_irq_get_byname() can be relaxed to only treat negative values as errors. This will also do decent fix even when backported to branches where fwnode_irq_get_byname() can still return zero on error because KX022A probe should later fail at IRQ requesting and a prober error handling should follow. Relax the return value check for fwnode_irq_get_byname() to only treat negative values as errors. Reported-by: kernel test robot Reported-by: Dan Carpenter Closes: https://lore.kernel.org/r/202305110245.MFxC9bUj-lkp@intel.com/ Link: https://lore.kernel.org/r/202305110245.MFxC9bUj-lkp@intel.com/ Signed-off-by: Matti Vaittinen Fixes: 7c1d1677b322 ("iio: accel: Support Kionix/ROHM KX022A accelerometer") --- drivers/iio/accel/kionix-kx022a.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/iio/accel/kionix-kx022a.c b/drivers/iio/accel/kionix-kx022a.c index f98393d74666..b8636fa8eaeb 100644 --- a/drivers/iio/accel/kionix-kx022a.c +++ b/drivers/iio/accel/kionix-kx022a.c @@ -1048,7 +1048,7 @@ int kx022a_probe_internal(struct device *dev) data->ien_reg = KX022A_REG_INC4; } else { irq = fwnode_irq_get_byname(fwnode, "INT2"); - if (irq <= 0) + if (irq < 0) return dev_err_probe(dev, irq, "No suitable IRQ\n"); data->inc_reg = KX022A_REG_INC5;