soc: qcom: aoss: Tidy up qmp_send() callers

With qmp_send() handling variable length messages and string formatting
he callers of qmp_send() can be cleaned up to not care about these
things.

Drop the QMP_MSG_LEN sized buffers and use the message formatting, as
appropriate.

Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Bjorn Andersson <quic_bjorande@quicinc.com>
Link: https://lore.kernel.org/r/20230811205839.727373-5-quic_bjorande@quicinc.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>

Author: quic-bjorande

drivers/net/ipa/ipa_power.c

@@ -324,15 +324,12 @@ void ipa_power_retention(struct ipa *ipa, bool enable)
 {
 	static const char fmt[] = "{ class: bcm, res: ipa_pc, val: %c }";
 	struct ipa_power *power = ipa->power;
-	char buf[36];	/* Exactly enough for fmt[]; size a multiple of 4 */
 	int ret;
 
 	if (!power->qmp)
 		return;		/* Not needed on this platform */
 
-	(void)snprintf(buf, sizeof(buf), fmt, enable ? '1' : '0');
-
-	ret = qmp_send(power->qmp, buf);
+	ret = qmp_send(power->qmp, fmt, enable ? '1' : '0');
 	if (ret)
 		dev_err(power->dev, "error %d sending QMP %sable request\n",
 			ret, enable ? "en" : "dis");

drivers/remoteproc/qcom_q6v5.c

@@ -23,19 +23,13 @@
 
 static int q6v5_load_state_toggle(struct qcom_q6v5 *q6v5, bool enable)
 {
-	char buf[Q6V5_LOAD_STATE_MSG_LEN];
 	int ret;
 
 	if (!q6v5->qmp)
 		return 0;
 
-	ret = snprintf(buf, sizeof(buf),
-		       "{class: image, res: load_state, name: %s, val: %s}",
+	ret = qmp_send(q6v5->qmp, "{class: image, res: load_state, name: %s, val: %s}",
 		       q6v5->load_state, enable ? "on" : "off");
-
-	WARN_ON(ret >= Q6V5_LOAD_STATE_MSG_LEN);
-
-	ret = qmp_send(q6v5->qmp, buf);
 	if (ret)
 		dev_err(q6v5->dev, "failed to toggle load state\n");
 

drivers/soc/qcom/qcom_aoss.c

@@ -264,15 +264,15 @@ EXPORT_SYMBOL(qmp_send);
 
 static int qmp_qdss_clk_prepare(struct clk_hw *hw)
 {
-	static const char buf[QMP_MSG_LEN] = "{class: clock, res: qdss, val: 1}";
+	static const char *buf = "{class: clock, res: qdss, val: 1}";
 	struct qmp *qmp = container_of(hw, struct qmp, qdss_clk);
 
 	return qmp_send(qmp, buf);
 }
 
 static void qmp_qdss_clk_unprepare(struct clk_hw *hw)
 {
-	static const char buf[QMP_MSG_LEN] = "{class: clock, res: qdss, val: 0}";
+	static const char *buf = "{class: clock, res: qdss, val: 0}";
 	struct qmp *qmp = container_of(hw, struct qmp, qdss_clk);
 
 	qmp_send(qmp, buf);
@@ -334,7 +334,6 @@ static int qmp_cdev_set_cur_state(struct thermal_cooling_device *cdev,
 				  unsigned long state)
 {
 	struct qmp_cooling_device *qmp_cdev = cdev->devdata;
-	char buf[QMP_MSG_LEN] = {};
 	bool cdev_state;
 	int ret;
 
@@ -344,13 +343,8 @@ static int qmp_cdev_set_cur_state(struct thermal_cooling_device *cdev,
 	if (qmp_cdev->state == state)
 		return 0;
 
-	snprintf(buf, sizeof(buf),
-		 "{class: volt_flr, event:zero_temp, res:%s, value:%s}",
-			qmp_cdev->name,
-			cdev_state ? "on" : "off");
-
-	ret = qmp_send(qmp_cdev->qmp, buf);
-
+	ret = qmp_send(qmp_cdev->qmp, "{class: volt_flr, event:zero_temp, res:%s, value:%s}",
+		       qmp_cdev->name, cdev_state ? "on" : "off");
 	if (!ret)
 		qmp_cdev->state = cdev_state;