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Message-Id: <20240628-mtk-cpufreq-dvfs-fail-init-err-v1-1-19c55db23011@collabora.com>
Date: Fri, 28 Jun 2024 15:48:23 -0400
From: Nícolas F. R. A. Prado <nfraprado@...labora.com>
To: "Rafael J. Wysocki" <rafael@...nel.org>,
Viresh Kumar <viresh.kumar@...aro.org>,
Matthias Brugger <matthias.bgg@...il.com>,
AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
Cc: kernel@...labora.com, linux-pm@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
linux-mediatek@...ts.infradead.org,
Nícolas F. R. A. Prado <nfraprado@...labora.com>
Subject: [PATCH] cpufreq: mediatek: Use dev_err_probe in every error path
in probe
Use the dev_err_probe() helper to log the errors on every error path in
the probe function and its sub-functions. This includes
* adding error messages where there was none
* converting over dev_err/dev_warn
* removing the top-level error message after mtk_cpu_dvfs_info_init() is
called, since every error path inside that function already logs the
error reason. This gets rid of the misleading error message when probe
is deferred:
mtk-cpufreq mtk-cpufreq: failed to initialize dvfs info for cpu0
Signed-off-by: Nícolas F. R. A. Prado <nfraprado@...labora.com>
---
drivers/cpufreq/mediatek-cpufreq.c | 66 ++++++++++++++++++--------------------
1 file changed, 31 insertions(+), 35 deletions(-)
diff --git a/drivers/cpufreq/mediatek-cpufreq.c b/drivers/cpufreq/mediatek-cpufreq.c
index 518606adf14e..b21425bb83be 100644
--- a/drivers/cpufreq/mediatek-cpufreq.c
+++ b/drivers/cpufreq/mediatek-cpufreq.c
@@ -390,28 +390,23 @@ static int mtk_cpu_dvfs_info_init(struct mtk_cpu_dvfs_info *info, int cpu)
int ret;
cpu_dev = get_cpu_device(cpu);
- if (!cpu_dev) {
- dev_err(cpu_dev, "failed to get cpu%d device\n", cpu);
- return -ENODEV;
- }
+ if (!cpu_dev)
+ return dev_err_probe(cpu_dev, -ENODEV, "failed to get cpu%d device\n", cpu);
info->cpu_dev = cpu_dev;
info->ccifreq_bound = false;
if (info->soc_data->ccifreq_supported) {
info->cci_dev = of_get_cci(info->cpu_dev);
- if (IS_ERR(info->cci_dev)) {
- ret = PTR_ERR(info->cci_dev);
- dev_err(cpu_dev, "cpu%d: failed to get cci device\n", cpu);
- return -ENODEV;
- }
+ if (IS_ERR(info->cci_dev))
+ return dev_err_probe(cpu_dev, PTR_ERR(info->cci_dev),
+ "cpu%d: failed to get cci device\n",
+ cpu);
}
info->cpu_clk = clk_get(cpu_dev, "cpu");
- if (IS_ERR(info->cpu_clk)) {
- ret = PTR_ERR(info->cpu_clk);
- return dev_err_probe(cpu_dev, ret,
+ if (IS_ERR(info->cpu_clk))
+ return dev_err_probe(cpu_dev, PTR_ERR(info->cpu_clk),
"cpu%d: failed to get cpu clk\n", cpu);
- }
info->inter_clk = clk_get(cpu_dev, "intermediate");
if (IS_ERR(info->inter_clk)) {
@@ -431,7 +426,7 @@ static int mtk_cpu_dvfs_info_init(struct mtk_cpu_dvfs_info *info, int cpu)
ret = regulator_enable(info->proc_reg);
if (ret) {
- dev_warn(cpu_dev, "cpu%d: failed to enable vproc\n", cpu);
+ dev_err_probe(cpu_dev, ret, "cpu%d: failed to enable vproc\n", cpu);
goto out_free_proc_reg;
}
@@ -439,14 +434,17 @@ static int mtk_cpu_dvfs_info_init(struct mtk_cpu_dvfs_info *info, int cpu)
info->sram_reg = regulator_get_optional(cpu_dev, "sram");
if (IS_ERR(info->sram_reg)) {
ret = PTR_ERR(info->sram_reg);
- if (ret == -EPROBE_DEFER)
+ if (ret == -EPROBE_DEFER) {
+ dev_err_probe(cpu_dev, ret,
+ "cpu%d: Failed to get sram regulator\n", cpu);
goto out_disable_proc_reg;
+ }
info->sram_reg = NULL;
} else {
ret = regulator_enable(info->sram_reg);
if (ret) {
- dev_warn(cpu_dev, "cpu%d: failed to enable vsram\n", cpu);
+ dev_err_probe(cpu_dev, ret, "cpu%d: failed to enable vsram\n", cpu);
goto out_free_sram_reg;
}
}
@@ -454,31 +452,34 @@ static int mtk_cpu_dvfs_info_init(struct mtk_cpu_dvfs_info *info, int cpu)
/* Get OPP-sharing information from "operating-points-v2" bindings */
ret = dev_pm_opp_of_get_sharing_cpus(cpu_dev, &info->cpus);
if (ret) {
- dev_err(cpu_dev,
+ dev_err_probe(cpu_dev, ret,
"cpu%d: failed to get OPP-sharing information\n", cpu);
goto out_disable_sram_reg;
}
ret = dev_pm_opp_of_cpumask_add_table(&info->cpus);
if (ret) {
- dev_warn(cpu_dev, "cpu%d: no OPP table\n", cpu);
+ dev_err_probe(cpu_dev, ret, "cpu%d: no OPP table\n", cpu);
goto out_disable_sram_reg;
}
ret = clk_prepare_enable(info->cpu_clk);
- if (ret)
+ if (ret) {
+ dev_err_probe(cpu_dev, ret, "cpu%d: failed to enable cpu clk\n", cpu);
goto out_free_opp_table;
+ }
ret = clk_prepare_enable(info->inter_clk);
- if (ret)
+ if (ret) {
+ dev_err_probe(cpu_dev, ret, "cpu%d: failed to enable inter clk\n", cpu);
goto out_disable_mux_clock;
+ }
if (info->soc_data->ccifreq_supported) {
info->vproc_on_boot = regulator_get_voltage(info->proc_reg);
if (info->vproc_on_boot < 0) {
ret = info->vproc_on_boot;
- dev_err(info->cpu_dev,
- "invalid Vproc value: %d\n", info->vproc_on_boot);
+ dev_err_probe(info->cpu_dev, ret, "invalid Vproc value\n");
goto out_disable_inter_clock;
}
}
@@ -487,7 +488,7 @@ static int mtk_cpu_dvfs_info_init(struct mtk_cpu_dvfs_info *info, int cpu)
rate = clk_get_rate(info->inter_clk);
opp = dev_pm_opp_find_freq_ceil(cpu_dev, &rate);
if (IS_ERR(opp)) {
- dev_err(cpu_dev, "cpu%d: failed to get intermediate opp\n", cpu);
+ dev_err_probe(cpu_dev, ret, "cpu%d: failed to get intermediate opp\n", cpu);
ret = PTR_ERR(opp);
goto out_disable_inter_clock;
}
@@ -501,7 +502,7 @@ static int mtk_cpu_dvfs_info_init(struct mtk_cpu_dvfs_info *info, int cpu)
info->opp_nb.notifier_call = mtk_cpufreq_opp_notifier;
ret = dev_pm_opp_register_notifier(cpu_dev, &info->opp_nb);
if (ret) {
- dev_err(cpu_dev, "cpu%d: failed to register opp notifier\n", cpu);
+ dev_err_probe(cpu_dev, ret, "cpu%d: failed to register opp notifier\n", cpu);
goto out_disable_inter_clock;
}
@@ -629,11 +630,9 @@ static int mtk_cpufreq_probe(struct platform_device *pdev)
int cpu, ret;
data = dev_get_platdata(&pdev->dev);
- if (!data) {
- dev_err(&pdev->dev,
- "failed to get mtk cpufreq platform data\n");
- return -ENODEV;
- }
+ if (!data)
+ return dev_err_probe(&pdev->dev, -ENODEV,
+ "failed to get mtk cpufreq platform data\n");
for_each_possible_cpu(cpu) {
info = mtk_cpu_dvfs_info_lookup(cpu);
@@ -643,24 +642,21 @@ static int mtk_cpufreq_probe(struct platform_device *pdev)
info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
if (!info) {
ret = -ENOMEM;
+ dev_err_probe(&pdev->dev, ret, "Failed to allocate dvfs_info\n");
goto release_dvfs_info_list;
}
info->soc_data = data;
ret = mtk_cpu_dvfs_info_init(info, cpu);
- if (ret) {
- dev_err(&pdev->dev,
- "failed to initialize dvfs info for cpu%d\n",
- cpu);
+ if (ret)
goto release_dvfs_info_list;
- }
list_add(&info->list_head, &dvfs_info_list);
}
ret = cpufreq_register_driver(&mtk_cpufreq_driver);
if (ret) {
- dev_err(&pdev->dev, "failed to register mtk cpufreq driver\n");
+ dev_err_probe(&pdev->dev, ret, "failed to register mtk cpufreq driver\n");
goto release_dvfs_info_list;
}
---
base-commit: 0fc4bfab2cd45f9acb86c4f04b5191e114e901ed
change-id: 20240627-mtk-cpufreq-dvfs-fail-init-err-0a662ca72de2
Best regards,
--
Nícolas F. R. A. Prado <nfraprado@...labora.com>
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