linux-kernel - [PATCH 4.4 02/33] PM / devfreq: Propagate error from devfreq_add

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Message-Id: <20180221124409.695872290@linuxfoundation.org>
Date:   Wed, 21 Feb 2018 13:44:45 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Chanwoo Choi <cw00.choi@...sung.com>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        MyungJoo Ham <myungjoo.ham@...sung.com>
Subject: [PATCH 4.4 02/33] PM / devfreq: Propagate error from devfreq_add_device()

4.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Bjorn Andersson <bjorn.andersson@...aro.org>

commit d1bf2d30728f310f72296b54f0651ecdb09cbb12 upstream.

Propagate the error of devfreq_add_device() in devm_devfreq_add_device()
rather than statically returning ENOMEM. This makes it slightly faster
to pinpoint the cause of a returned error.

Fixes: 8cd84092d35e ("PM / devfreq: Add resource-managed function for devfreq device")
Cc: stable@...r.kernel.org
Acked-by: Chanwoo Choi <cw00.choi@...sung.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@...aro.org>
Signed-off-by: MyungJoo Ham <myungjoo.ham@...sung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/devfreq/devfreq.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/devfreq/devfreq.c
+++ b/drivers/devfreq/devfreq.c
@@ -583,7 +583,7 @@ struct devfreq *devm_devfreq_add_device(
 	devfreq = devfreq_add_device(dev, profile, governor_name, data);
 	if (IS_ERR(devfreq)) {
 		devres_free(ptr);
-		return ERR_PTR(-ENOMEM);
+		return devfreq;
 	}
 
 	*ptr = devfreq;