| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <20220408045908.21671-4-rex-bc.chen@mediatek.com>
Date: Fri, 8 Apr 2022 12:58:56 +0800
From: Rex-BC Chen <rex-bc.chen@...iatek.com>
To: <rafael@...nel.org>, <viresh.kumar@...aro.org>,
<robh+dt@...nel.org>, <krzk+dt@...nel.org>
CC: <matthias.bgg@...il.com>, <jia-wei.chang@...iatek.com>,
<roger.lu@...iatek.com>, <hsinyi@...gle.com>,
<linux-pm@...r.kernel.org>, <devicetree@...r.kernel.org>,
<linux-kernel@...r.kernel.org>,
<linux-arm-kernel@...ts.infradead.org>,
<linux-mediatek@...ts.infradead.org>,
<Project_Global_Chrome_Upstream_Group@...iatek.com>,
Rex-BC Chen <rex-bc.chen@...iatek.com>
Subject: [PATCH V2 03/15] cpufreq: mediatek: Cleanup variables and error handling in mtk_cpu_dvfs_info_init()
From: Jia-Wei Chang <jia-wei.chang@...iatek.com>
- Remove several unnecessary varaibles in mtk_cpu_dvfs_info_init().
- Unify error message format and use dev_err_probe() if possible.
Signed-off-by: Jia-Wei Chang <jia-wei.chang@...iatek.com>
Signed-off-by: Rex-BC Chen <rex-bc.chen@...iatek.com>
---
drivers/cpufreq/mediatek-cpufreq.c | 89 ++++++++++++------------------
1 file changed, 34 insertions(+), 55 deletions(-)
diff --git a/drivers/cpufreq/mediatek-cpufreq.c b/drivers/cpufreq/mediatek-cpufreq.c
index 9d7d9c8dc184..e0545aca7e41 100644
--- a/drivers/cpufreq/mediatek-cpufreq.c
+++ b/drivers/cpufreq/mediatek-cpufreq.c
@@ -300,96 +300,75 @@ static int mtk_cpufreq_set_target(struct cpufreq_policy *policy,
static int mtk_cpu_dvfs_info_init(struct mtk_cpu_dvfs_info *info, int cpu)
{
struct device *cpu_dev;
- struct regulator *proc_reg = ERR_PTR(-ENODEV);
- struct regulator *sram_reg = ERR_PTR(-ENODEV);
- struct clk *cpu_clk = ERR_PTR(-ENODEV);
- struct clk *inter_clk = ERR_PTR(-ENODEV);
struct dev_pm_opp *opp;
unsigned long rate;
int ret;
cpu_dev = get_cpu_device(cpu);
if (!cpu_dev) {
- pr_err("failed to get cpu%d device\n", cpu);
+ dev_err(cpu_dev, "failed to get cpu%d device\n", cpu);
return -ENODEV;
}
+ info->cpu_dev = cpu_dev;
- cpu_clk = clk_get(cpu_dev, "cpu");
- if (IS_ERR(cpu_clk)) {
- if (PTR_ERR(cpu_clk) == -EPROBE_DEFER)
- pr_warn("cpu clk for cpu%d not ready, retry.\n", cpu);
- else
- pr_err("failed to get cpu clk for cpu%d\n", cpu);
-
- ret = PTR_ERR(cpu_clk);
- return ret;
+ 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,
+ "cpu%d: failed to get cpu clk\n", cpu);
}
- inter_clk = clk_get(cpu_dev, "intermediate");
- if (IS_ERR(inter_clk)) {
- if (PTR_ERR(inter_clk) == -EPROBE_DEFER)
- pr_warn("intermediate clk for cpu%d not ready, retry.\n",
- cpu);
- else
- pr_err("failed to get intermediate clk for cpu%d\n",
- cpu);
-
- ret = PTR_ERR(inter_clk);
+ info->inter_clk = clk_get(cpu_dev, "intermediate");
+ if (IS_ERR(info->inter_clk)) {
+ ret = PTR_ERR(info->inter_clk);
+ dev_err_probe(cpu_dev, ret,
+ "cpu%d: failed to get intermediate clk\n", cpu);
goto out_free_resources;
}
- proc_reg = regulator_get_optional(cpu_dev, "proc");
- if (IS_ERR(proc_reg)) {
- if (PTR_ERR(proc_reg) == -EPROBE_DEFER)
- pr_warn("proc regulator for cpu%d not ready, retry.\n",
- cpu);
- else
- pr_err("failed to get proc regulator for cpu%d\n",
- cpu);
-
- ret = PTR_ERR(proc_reg);
+ info->proc_reg = regulator_get_optional(cpu_dev, "proc");
+ if (IS_ERR(info->proc_reg)) {
+ ret = PTR_ERR(info->proc_reg);
+ dev_err_probe(cpu_dev, ret,
+ "cpu%d: failed to get proc regulator\n", cpu);
goto out_free_resources;
}
/* Both presence and absence of sram regulator are valid cases. */
- sram_reg = regulator_get_exclusive(cpu_dev, "sram");
+ info->sram_reg = regulator_get_exclusive(cpu_dev, "sram");
+ if (IS_ERR(info->sram_reg))
+ info->sram_reg = NULL;
/* Get OPP-sharing information from "operating-points-v2" bindings */
ret = dev_pm_opp_of_get_sharing_cpus(cpu_dev, &info->cpus);
if (ret) {
- pr_err("failed to get OPP-sharing information for cpu%d\n",
- cpu);
+ dev_err(cpu_dev,
+ "cpu%d: failed to get OPP-sharing information\n", cpu);
goto out_free_resources;
}
ret = dev_pm_opp_of_cpumask_add_table(&info->cpus);
if (ret) {
- pr_warn("no OPP table for cpu%d\n", cpu);
+ dev_warn(cpu_dev, "cpu%d: no OPP table\n", cpu);
goto out_free_resources;
}
/* Search a safe voltage for intermediate frequency. */
- rate = clk_get_rate(inter_clk);
+ rate = clk_get_rate(info->inter_clk);
opp = dev_pm_opp_find_freq_ceil(cpu_dev, &rate);
if (IS_ERR(opp)) {
- pr_err("failed to get intermediate opp for cpu%d\n", cpu);
+ dev_err(cpu_dev, "cpu%d: failed to get intermediate opp\n", cpu);
ret = PTR_ERR(opp);
goto out_free_opp_table;
}
info->intermediate_voltage = dev_pm_opp_get_voltage(opp);
dev_pm_opp_put(opp);
- info->cpu_dev = cpu_dev;
- info->proc_reg = proc_reg;
- info->sram_reg = IS_ERR(sram_reg) ? NULL : sram_reg;
- info->cpu_clk = cpu_clk;
- info->inter_clk = inter_clk;
-
/*
* If SRAM regulator is present, software "voltage tracking" is needed
* for this CPU power domain.
*/
- info->need_voltage_tracking = !IS_ERR(sram_reg);
+ info->need_voltage_tracking = (info->sram_reg != NULL);
return 0;
@@ -397,14 +376,14 @@ static int mtk_cpu_dvfs_info_init(struct mtk_cpu_dvfs_info *info, int cpu)
dev_pm_opp_of_cpumask_remove_table(&info->cpus);
out_free_resources:
- if (!IS_ERR(proc_reg))
- regulator_put(proc_reg);
- if (!IS_ERR(sram_reg))
- regulator_put(sram_reg);
- if (!IS_ERR(cpu_clk))
- clk_put(cpu_clk);
- if (!IS_ERR(inter_clk))
- clk_put(inter_clk);
+ if (!IS_ERR(info->proc_reg))
+ regulator_put(info->proc_reg);
+ if (!IS_ERR(info->sram_reg))
+ regulator_put(info->sram_reg);
+ if (!IS_ERR(info->cpu_clk))
+ clk_put(info->cpu_clk);
+ if (!IS_ERR(info->inter_clk))
+ clk_put(info->inter_clk);
return ret;
}
--
2.18.0
Powered by blists - more mailing lists