diff mbox series

cpufreq: tegra194: Fix an error handling path in tegra194_cpufreq_probe()

Message ID 30b17e2219abc3a9a137d28bb51e53732bba5103.1682428267.git.christophe.jaillet@wanadoo.fr
State New
Headers
Series cpufreq: tegra194: Fix an error handling path in tegra194_cpufreq_probe() |

Commit Message

Christophe JAILLET April 25, 2023, 1:11 p.m. UTC 
  If the probe needs to be deferred, some resources still need to be
released. So branch to the error handling path instead of returning
directly.

Fixes: f41e1442ac5b ("cpufreq: tegra194: add OPP support and set bandwidth")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
---
Compile tested-only
---
 drivers/cpufreq/tegra194-cpufreq.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

Comments

Sumit Gupta April 28, 2023, 11:34 a.m. UTC | #1 
On 25/04/23 18:41, Christophe JAILLET wrote:
> External email: Use caution opening links or attachments
> 
> 
> If the probe needs to be deferred, some resources still need to be
> released. So branch to the error handling path instead of returning
> directly.
> 
> Fixes: f41e1442ac5b ("cpufreq: tegra194: add OPP support and set bandwidth")
> Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>

Reviewed-by: Sumit Gupta <sumitg@nvidia.com>

> ---
> Compile tested-only
> ---
>   drivers/cpufreq/tegra194-cpufreq.c | 6 ++++--
>   1 file changed, 4 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/cpufreq/tegra194-cpufreq.c b/drivers/cpufreq/tegra194-cpufreq.c
> index c8d03346068a..36dad5ea5947 100644
> --- a/drivers/cpufreq/tegra194-cpufreq.c
> +++ b/drivers/cpufreq/tegra194-cpufreq.c
> @@ -686,8 +686,10 @@ static int tegra194_cpufreq_probe(struct platform_device *pdev)
> 
>          /* Check for optional OPPv2 and interconnect paths on CPU0 to enable ICC scaling */
>          cpu_dev = get_cpu_device(0);
> -       if (!cpu_dev)
> -               return -EPROBE_DEFER;
> +       if (!cpu_dev) {
> +               err = -EPROBE_DEFER;
> +               goto err_free_res;
> +       }
> 
>          if (dev_pm_opp_of_get_opp_desc_node(cpu_dev)) {
>                  err = dev_pm_opp_of_find_icc_paths(cpu_dev, NULL);
> --
> 2.34.1
>
Thierry Reding May 2, 2023, 10:30 a.m. UTC | #2 
On Tue, Apr 25, 2023 at 03:11:19PM +0200, Christophe JAILLET wrote:
> If the probe needs to be deferred, some resources still need to be
> released. So branch to the error handling path instead of returning
> directly.
> 
> Fixes: f41e1442ac5b ("cpufreq: tegra194: add OPP support and set bandwidth")
> Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
> ---
> Compile tested-only
> ---
>  drivers/cpufreq/tegra194-cpufreq.c | 6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/cpufreq/tegra194-cpufreq.c b/drivers/cpufreq/tegra194-cpufreq.c
> index c8d03346068a..36dad5ea5947 100644
> --- a/drivers/cpufreq/tegra194-cpufreq.c
> +++ b/drivers/cpufreq/tegra194-cpufreq.c
> @@ -686,8 +686,10 @@ static int tegra194_cpufreq_probe(struct platform_device *pdev)
>  
>  	/* Check for optional OPPv2 and interconnect paths on CPU0 to enable ICC scaling */
>  	cpu_dev = get_cpu_device(0);
> -	if (!cpu_dev)
> -		return -EPROBE_DEFER;
> +	if (!cpu_dev) {
> +		err = -EPROBE_DEFER;
> +		goto err_free_res;
> +	}

I think ultimately it'd be better to try get_cpu_device(0) earlier so
that we don't do all that work upfront before we fail. However, it looks
like there's some other improvements that could be done in that area, so
this looks like a good fix in the meantime:

Acked-by: Thierry Reding <treding@nvidia.com>
Viresh Kumar May 11, 2023, 9:03 a.m. UTC | #3 
On 25-04-23, 15:11, Christophe JAILLET wrote:
> If the probe needs to be deferred, some resources still need to be
> released. So branch to the error handling path instead of returning
> directly.
> 
> Fixes: f41e1442ac5b ("cpufreq: tegra194: add OPP support and set bandwidth")
> Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
> ---
> Compile tested-only
> ---
>  drivers/cpufreq/tegra194-cpufreq.c | 6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/cpufreq/tegra194-cpufreq.c b/drivers/cpufreq/tegra194-cpufreq.c
> index c8d03346068a..36dad5ea5947 100644
> --- a/drivers/cpufreq/tegra194-cpufreq.c
> +++ b/drivers/cpufreq/tegra194-cpufreq.c
> @@ -686,8 +686,10 @@ static int tegra194_cpufreq_probe(struct platform_device *pdev)
>  
>  	/* Check for optional OPPv2 and interconnect paths on CPU0 to enable ICC scaling */
>  	cpu_dev = get_cpu_device(0);
> -	if (!cpu_dev)
> -		return -EPROBE_DEFER;
> +	if (!cpu_dev) {
> +		err = -EPROBE_DEFER;
> +		goto err_free_res;
> +	}
>  
>  	if (dev_pm_opp_of_get_opp_desc_node(cpu_dev)) {
>  		err = dev_pm_opp_of_find_icc_paths(cpu_dev, NULL);

Applied. Thanks.
diff mbox series

Patch

diff --git a/drivers/cpufreq/tegra194-cpufreq.c b/drivers/cpufreq/tegra194-cpufreq.c
index c8d03346068a..36dad5ea5947 100644
--- a/drivers/cpufreq/tegra194-cpufreq.c
+++ b/drivers/cpufreq/tegra194-cpufreq.c
@@ -686,8 +686,10 @@  static int tegra194_cpufreq_probe(struct platform_device *pdev)
 
 	/* Check for optional OPPv2 and interconnect paths on CPU0 to enable ICC scaling */
 	cpu_dev = get_cpu_device(0);
-	if (!cpu_dev)
-		return -EPROBE_DEFER;
+	if (!cpu_dev) {
+		err = -EPROBE_DEFER;
+		goto err_free_res;
+	}
 
 	if (dev_pm_opp_of_get_opp_desc_node(cpu_dev)) {
 		err = dev_pm_opp_of_find_icc_paths(cpu_dev, NULL);