linux-kernel - [PATCH 1/2] clk: qcom: rpmh: Simplify clk_rpmh_bcm_send

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Date:   Mon,  9 Mar 2020 15:12:31 -0700
From:   Stephen Boyd <sboyd@...nel.org>
To:     Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>
Cc:     linux-kernel@...r.kernel.org, linux-clk@...r.kernel.org,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Taniya Das <tdas@...eaurora.org>
Subject: [PATCH 1/2] clk: qcom: rpmh: Simplify clk_rpmh_bcm_send_cmd()

This function has some duplication in unlocking a mutex and returns in a
few different places. Let's use some if statements to consolidate code
and make this a bit easier to read.

Cc: Bjorn Andersson <bjorn.andersson@...aro.org>
CC: Taniya Das <tdas@...eaurora.org>
Signed-off-by: Stephen Boyd <sboyd@...nel.org>
---
 drivers/clk/qcom/clk-rpmh.c | 33 ++++++++++++++-------------------
 1 file changed, 14 insertions(+), 19 deletions(-)

diff --git a/drivers/clk/qcom/clk-rpmh.c b/drivers/clk/qcom/clk-rpmh.c
index bfc29aec3a78..b1b277b55682 100644
--- a/drivers/clk/qcom/clk-rpmh.c
+++ b/drivers/clk/qcom/clk-rpmh.c
@@ -259,38 +259,33 @@ static int clk_rpmh_bcm_send_cmd(struct clk_rpmh *c, bool enable)
 {
 	struct tcs_cmd cmd = { 0 };
 	u32 cmd_state;
-	int ret;
+	int ret = 0;
 
 	mutex_lock(&rpmh_clk_lock);
-
-	cmd_state = 0;
 	if (enable) {
 		cmd_state = 1;
 		if (c->aggr_state)
 			cmd_state = c->aggr_state;
+	} else {
+		cmd_state = 0;
 	}
 
-	if (c->last_sent_aggr_state == cmd_state) {
-		mutex_unlock(&rpmh_clk_lock);
-		return 0;
-	}
-
-	cmd.addr = c->res_addr;
-	cmd.data = BCM_TCS_CMD(1, enable, 0, cmd_state);
+	if (c->last_sent_aggr_state != cmd_state) {
+		cmd.addr = c->res_addr;
+		cmd.data = BCM_TCS_CMD(1, enable, 0, cmd_state);
 
-	ret = clk_rpmh_send(c, RPMH_ACTIVE_ONLY_STATE, &cmd, enable);
-	if (ret) {
-		dev_err(c->dev, "set active state of %s failed: (%d)\n",
-			c->res_name, ret);
-		mutex_unlock(&rpmh_clk_lock);
-		return ret;
+		ret = clk_rpmh_send(c, RPMH_ACTIVE_ONLY_STATE, &cmd, enable);
+		if (ret) {
+			dev_err(c->dev, "set active state of %s failed: (%d)\n",
+				c->res_name, ret);
+		} else {
+			c->last_sent_aggr_state = cmd_state;
+		}
 	}
 
-	c->last_sent_aggr_state = cmd_state;
-
 	mutex_unlock(&rpmh_clk_lock);
 
-	return 0;
+	return ret;
 }
 
 static int clk_rpmh_bcm_prepare(struct clk_hw *hw)
-- 
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