Commit 5ad7346b4ae2 ("cpufreq: kryo: Add module remove and exit") made
it possible to build the kyro cpufreq driver as a module, but it failed
to release all the resources, i.e. OPP tables, when the module is
unloaded.
This patch fixes it by releasing the OPP tables, by calling
dev_pm_opp_put_supported_hw() for them, from the
qcom_cpufreq_kryo_remove() routine. The array of pointers to the OPP
tables is also allocated dynamically now in qcom_cpufreq_kryo_probe(),
as the pointers will be required while releasing the resources.
Compile tested only.
Cc: 4.18+ <stable@xxxxxxxxxxxxxxx> # v4.18+
Fixes: 5ad7346b4ae2 ("cpufreq: kryo: Add module remove and exit")
Signed-off-by: Viresh Kumar <viresh.kumar@xxxxxxxxxx>
---
V1->V2:
- The previous version targeted a compile time issue of frame size but
this fixes a bug in the driver and needs to get applied to 4.18+
kernels.
- This may go in 5.0 release.
- Haven't included any Reviewed-by tags as there were many changes in
this version.
drivers/cpufreq/qcom-cpufreq-kryo.c | 20 ++++++++++++++++++--
1 file changed, 18 insertions(+), 2 deletions(-)
diff --git a/drivers/cpufreq/qcom-cpufreq-kryo.c b/drivers/cpufreq/qcom-cpufreq-kryo.c
index 2a3675c24032..65edbfd4d4a5 100644
--- a/drivers/cpufreq/qcom-cpufreq-kryo.c
+++ b/drivers/cpufreq/qcom-cpufreq-kryo.c
@@ -75,7 +75,7 @@ static enum _msm8996_version qcom_cpufreq_kryo_get_msm_id(void)
static int qcom_cpufreq_kryo_probe(struct platform_device *pdev)
{
- struct opp_table *opp_tables[NR_CPUS] = {0};
+ struct opp_table **opp_tables;
enum _msm8996_version msm8996_version;
struct nvmem_cell *speedbin_nvmem;
struct device_node *np;
@@ -133,6 +133,10 @@ static int qcom_cpufreq_kryo_probe(struct platform_device *pdev)
}
kfree(speedbin);
+ opp_tables = kcalloc(num_possible_cpus(), sizeof(*opp_tables), GFP_KERNEL);
+ if (!opp_tables)
+ return -ENOMEM;
+
for_each_possible_cpu(cpu) {
cpu_dev = get_cpu_device(cpu);
if (NULL == cpu_dev) {
@@ -151,8 +155,10 @@ static int qcom_cpufreq_kryo_probe(struct platform_device *pdev)
cpufreq_dt_pdev = platform_device_register_simple("cpufreq-dt", -1,
NULL, 0);
- if (!IS_ERR(cpufreq_dt_pdev))
+ if (!IS_ERR(cpufreq_dt_pdev)) {
+ platform_set_drvdata(pdev, opp_tables);
return 0;
+ }
ret = PTR_ERR(cpufreq_dt_pdev);
dev_err(cpu_dev, "Failed to register platform device\n");
@@ -163,13 +169,23 @@ static int qcom_cpufreq_kryo_probe(struct platform_device *pdev)
break;
dev_pm_opp_put_supported_hw(opp_tables[cpu]);
}
+ kfree(opp_tables);
return ret;
}
static int qcom_cpufreq_kryo_remove(struct platform_device *pdev)
{
+ struct opp_table **opp_tables = platform_get_drvdata(pdev);
+ unsigned cpu;
+
platform_device_unregister(cpufreq_dt_pdev);
+
+ for_each_possible_cpu(cpu)
+ dev_pm_opp_put_supported_hw(opp_tables[cpu]);
+
+ kfree(opp_tables);
+
return 0;
}
--
2.21.0.rc0.269.g1a574e7a288b
