linux-kernel - [PATCH 3/3] firmware: qcom: scm: Return PTR_ERR when devm_clk

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Message-Id: <1477699729-18451-4-git-send-email-spjoshi@codeaurora.org>
Date:   Fri, 28 Oct 2016 17:08:49 -0700
From:   Sarangdhar Joshi <spjoshi@...eaurora.org>
To:     Andy Gross <andy.gross@...aro.org>,
        David Brown <david.brown@...aro.org>
Cc:     Sarangdhar Joshi <spjoshi@...eaurora.org>,
        linux-arm-msm@...r.kernel.org, linux-soc@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Jordan Crouse <jcrouse@...eaurora.org>,
        Stephen Boyd <sboyd@...eaurora.org>,
        Trilok Soni <tsoni@...eaurora.org>
Subject: [PATCH 3/3] firmware: qcom: scm: Return PTR_ERR when devm_clk_get fails

When devm_clk_get fails for core clock, the failure was ignored
and the core_clk was explicitly set to NULL so that other
remaining clocks can be queried. However, now that we have a
clean way of expressing the clock dependency, return failure when
devm_clk_get fails for core clock.

Signed-off-by: Sarangdhar Joshi <spjoshi@...eaurora.org>
---
 drivers/firmware/qcom_scm.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/firmware/qcom_scm.c b/drivers/firmware/qcom_scm.c
index 010a350..5c472da 100644
--- a/drivers/firmware/qcom_scm.c
+++ b/drivers/firmware/qcom_scm.c
@@ -395,10 +395,10 @@ static int qcom_scm_probe(struct platform_device *pdev)
 	if (clks & SCM_HAS_CORE_CLK) {
 		scm->core_clk = devm_clk_get(&pdev->dev, "core");
 		if (IS_ERR(scm->core_clk)) {
-			if (PTR_ERR(scm->core_clk) == -EPROBE_DEFER)
-				return PTR_ERR(scm->core_clk);
-
-			scm->core_clk = NULL;
+			if (PTR_ERR(scm->core_clk) != -EPROBE_DEFER)
+				dev_err(&pdev->dev,
+					"failed to acquire core clk\n");
+			return PTR_ERR(scm->core_clk);
 		}
 	}
 
-- 
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