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Mon, 23 Dec 2019 11:19:24 -0800 (PST) From: Yangtao Li To: cw00.choi@samsung.com, myungjoo.ham@samsung.com, kyungmin.park@samsung.com, kgene@kernel.org, krzk@kernel.org Subject: [PATCH] PM / devfreq: exynos-bus: Add error log when get event fails Date: Mon, 23 Dec 2019 19:19:23 +0000 Message-Id: <20191223191923.10450-1-tiny.windzz@gmail.com> X-Mailer: git-send-email 2.17.1 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191223_111926_431079_DA271D81 X-CRM114-Status: GOOD ( 12.25 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Yangtao Li , linux-samsung-soc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-pm@vger.kernel.org MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org Adding an error log makes it easier to trace the function's error path. Because the error code may be rewritten on return, print error code here. Signed-off-by: Yangtao Li --- drivers/devfreq/exynos-bus.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/devfreq/exynos-bus.c b/drivers/devfreq/exynos-bus.c index 948e9340f91c..634d63fd00ea 100644 --- a/drivers/devfreq/exynos-bus.c +++ b/drivers/devfreq/exynos-bus.c @@ -126,6 +126,8 @@ static int exynos_bus_get_dev_status(struct device *dev, ret = exynos_bus_get_event(bus, &edata); if (ret < 0) { + dev_err(dev, "failed to get event from devfreq-event devices %d\n", + ret); stat->total_time = stat->busy_time = 0; goto err; } -- 2.17.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel