Patch "cpufreq: imx6q: don't warn for disabling a non-existing frequency" has been added to the 5.15-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    cpufreq: imx6q: don't warn for disabling a non-existing frequency

to the 5.15-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     cpufreq-imx6q-don-t-warn-for-disabling-a-non-existin.patch
and it can be found in the queue-5.15 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit f0041e826bf3e7cd2dd219b3c2c9ac0326946ac2
Author: Christoph Niedermaier <cniedermaier@xxxxxxxxxxxxxxxxxx>
Date:   Fri May 12 17:07:11 2023 +0200

    cpufreq: imx6q: don't warn for disabling a non-existing frequency
    
    [ Upstream commit 11a3b0ac33d95aa84be426e801f800997262a225 ]
    
    It is confusing if a warning is given for disabling a non-existent
    frequency of the operating performance points (OPP). In this case
    the function dev_pm_opp_disable() returns -ENODEV. Check the return
    value and avoid the output of a warning in this case. Avoid code
    duplication by using a separate function.
    
    Signed-off-by: Christoph Niedermaier <cniedermaier@xxxxxxxxxxxxxxxxxx>
    [ Viresh : Updated commit subject ]
    Signed-off-by: Viresh Kumar <viresh.kumar@xxxxxxxxxx>
    Stable-dep-of: 2e4e0984c7d6 ("cpufreq: imx6q: Don't disable 792 Mhz OPP unnecessarily")
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/cpufreq/imx6q-cpufreq.c b/drivers/cpufreq/imx6q-cpufreq.c
index 90beb26ed34e9..37d30fa2df5fa 100644
--- a/drivers/cpufreq/imx6q-cpufreq.c
+++ b/drivers/cpufreq/imx6q-cpufreq.c
@@ -209,6 +209,14 @@ static struct cpufreq_driver imx6q_cpufreq_driver = {
 	.suspend = cpufreq_generic_suspend,
 };
 
+static void imx6x_disable_freq_in_opp(struct device *dev, unsigned long freq)
+{
+	int ret = dev_pm_opp_disable(dev, freq);
+
+	if (ret < 0 && ret != -ENODEV)
+		dev_warn(dev, "failed to disable %ldMHz OPP\n", freq / 1000000);
+}
+
 #define OCOTP_CFG3			0x440
 #define OCOTP_CFG3_SPEED_SHIFT		16
 #define OCOTP_CFG3_SPEED_1P2GHZ		0x3
@@ -254,17 +262,15 @@ static int imx6q_opp_check_speed_grading(struct device *dev)
 	val &= 0x3;
 
 	if (val < OCOTP_CFG3_SPEED_996MHZ)
-		if (dev_pm_opp_disable(dev, 996000000))
-			dev_warn(dev, "failed to disable 996MHz OPP\n");
+		imx6x_disable_freq_in_opp(dev, 996000000);
 
 	if (of_machine_is_compatible("fsl,imx6q") ||
 	    of_machine_is_compatible("fsl,imx6qp")) {
 		if (val != OCOTP_CFG3_SPEED_852MHZ)
-			if (dev_pm_opp_disable(dev, 852000000))
-				dev_warn(dev, "failed to disable 852MHz OPP\n");
+			imx6x_disable_freq_in_opp(dev, 852000000);
+
 		if (val != OCOTP_CFG3_SPEED_1P2GHZ)
-			if (dev_pm_opp_disable(dev, 1200000000))
-				dev_warn(dev, "failed to disable 1.2GHz OPP\n");
+			imx6x_disable_freq_in_opp(dev, 1200000000);
 	}
 
 	return 0;
@@ -316,20 +322,16 @@ static int imx6ul_opp_check_speed_grading(struct device *dev)
 	val >>= OCOTP_CFG3_SPEED_SHIFT;
 	val &= 0x3;
 
-	if (of_machine_is_compatible("fsl,imx6ul")) {
+	if (of_machine_is_compatible("fsl,imx6ul"))
 		if (val != OCOTP_CFG3_6UL_SPEED_696MHZ)
-			if (dev_pm_opp_disable(dev, 696000000))
-				dev_warn(dev, "failed to disable 696MHz OPP\n");
-	}
+			imx6x_disable_freq_in_opp(dev, 696000000);
 
 	if (of_machine_is_compatible("fsl,imx6ull")) {
 		if (val != OCOTP_CFG3_6ULL_SPEED_792MHZ)
-			if (dev_pm_opp_disable(dev, 792000000))
-				dev_warn(dev, "failed to disable 792MHz OPP\n");
+			imx6x_disable_freq_in_opp(dev, 792000000);
 
 		if (val != OCOTP_CFG3_6ULL_SPEED_900MHZ)
-			if (dev_pm_opp_disable(dev, 900000000))
-				dev_warn(dev, "failed to disable 900MHz OPP\n");
+			imx6x_disable_freq_in_opp(dev, 900000000);
 	}
 
 	return ret;