* [PATCH V2] cpufreq: kyro: Release OPP tables on module removal
@ 2019-02-27 10:04 Viresh Kumar
2019-02-27 13:10 ` Georgi Djakov
2019-02-28 4:10 ` [PATCH V3] cpufreq: kryo: " Viresh Kumar
0 siblings, 2 replies; 3+ messages in thread
From: Viresh Kumar @ 2019-02-27 10:04 UTC (permalink / raw)
To: Rafael Wysocki, Ilia Lin
Cc: Viresh Kumar, linux-pm, Vincent Guittot, Arnd Bergmann,
amit.kucheria, 4 . 18+,
linux-kernel
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@vger.kernel.org> # v4.18+
Fixes: 5ad7346b4ae2 ("cpufreq: kryo: Add module remove and exit")
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
---
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
^ permalink raw reply related [flat|nested] 3+ messages in thread* Re: [PATCH V2] cpufreq: kyro: Release OPP tables on module removal
2019-02-27 10:04 [PATCH V2] cpufreq: kyro: Release OPP tables on module removal Viresh Kumar
@ 2019-02-27 13:10 ` Georgi Djakov
2019-02-28 4:10 ` [PATCH V3] cpufreq: kryo: " Viresh Kumar
1 sibling, 0 replies; 3+ messages in thread
From: Georgi Djakov @ 2019-02-27 13:10 UTC (permalink / raw)
To: Viresh Kumar
Cc: Rafael Wysocki, Ilia Lin, linux-pm, Vincent Guittot,
Arnd Bergmann, amit.kucheria, stable, linux-kernel
On 2/27/19 12:04, Viresh Kumar wrote:
> Commit 5ad7346b4ae2 ("cpufreq: kryo: Add module remove and exit") made
> it possible to build the kyro cpufreq driver as a module, but it failed
Nit: s/kyro/kryo/ above and in the subject
> 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@vger.kernel.org> # v4.18+
> Fixes: 5ad7346b4ae2 ("cpufreq: kryo: Add module remove and exit")
> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
> ---
> 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;
Nit: unsigned int
> +
> 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;
> }
>
Reviewed-by: Georgi Djakov <georgi.djakov@linaro.org>
Thanks,
Georgi
^ permalink raw reply [flat|nested] 3+ messages in thread* [PATCH V3] cpufreq: kryo: Release OPP tables on module removal
2019-02-27 10:04 [PATCH V2] cpufreq: kyro: Release OPP tables on module removal Viresh Kumar
2019-02-27 13:10 ` Georgi Djakov
@ 2019-02-28 4:10 ` Viresh Kumar
1 sibling, 0 replies; 3+ messages in thread
From: Viresh Kumar @ 2019-02-28 4:10 UTC (permalink / raw)
To: Rafael Wysocki, Ilia Lin
Cc: Viresh Kumar, linux-pm, Vincent Guittot, Arnd Bergmann,
amit.kucheria, georgi.djakov, 4 . 18+,
linux-kernel
Commit 5ad7346b4ae2 ("cpufreq: kryo: Add module remove and exit") made
it possible to build the kryo 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@vger.kernel.org> # v4.18+
Fixes: 5ad7346b4ae2 ("cpufreq: kryo: Add module remove and exit")
Reviewed-by: Georgi Djakov <georgi.djakov@linaro.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
---
V2->V3:
- s/kyro/kryo/
- s/unsigned/unsigned int/
- Added Reviewed-by tag
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..a472b814058f 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 int 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
^ permalink raw reply related [flat|nested] 3+ messages in thread
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2019-02-27 10:04 [PATCH V2] cpufreq: kyro: Release OPP tables on module removal Viresh Kumar
2019-02-27 13:10 ` Georgi Djakov
2019-02-28 4:10 ` [PATCH V3] cpufreq: kryo: " Viresh Kumar
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