remoteproc: k3: Call of_node_put(rmem_np) only once in three functions

[PATCH] remoteproc: k3: Call of_node_put(rmem_np) only once in three functions

Posted by Markus Elfring 1 year, 4 months ago

From: Markus Elfring <elfring@users.sourceforge.net>
Date: Tue, 24 Sep 2024 14:28:35 +0200

An of_node_put(rmem_np) call was immediately used after a pointer check
for a of_reserved_mem_lookup() call in three function implementations.
Thus call such a function only once instead directly before the checks.

This issue was transformed by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
---
 drivers/remoteproc/ti_k3_dsp_remoteproc.c | 6 ++----
 drivers/remoteproc/ti_k3_m4_remoteproc.c  | 6 ++----
 drivers/remoteproc/ti_k3_r5_remoteproc.c  | 3 +--
 3 files changed, 5 insertions(+), 10 deletions(-)

diff --git a/drivers/remoteproc/ti_k3_dsp_remoteproc.c b/drivers/remoteproc/ti_k3_dsp_remoteproc.c
index 8be3f631c192..d08a3a98ada1 100644
--- a/drivers/remoteproc/ti_k3_dsp_remoteproc.c
+++ b/drivers/remoteproc/ti_k3_dsp_remoteproc.c
@@ -576,11 +576,9 @@ static int k3_dsp_reserved_mem_init(struct k3_dsp_rproc *kproc)
 			return -EINVAL;

 		rmem = of_reserved_mem_lookup(rmem_np);
-		if (!rmem) {
-			of_node_put(rmem_np);
-			return -EINVAL;
-		}
 		of_node_put(rmem_np);
+		if (!rmem)
+			return -EINVAL;

 		kproc->rmem[i].bus_addr = rmem->base;
 		/* 64-bit address regions currently not supported */
diff --git a/drivers/remoteproc/ti_k3_m4_remoteproc.c b/drivers/remoteproc/ti_k3_m4_remoteproc.c
index 09f0484a90e1..a16fb165fced 100644
--- a/drivers/remoteproc/ti_k3_m4_remoteproc.c
+++ b/drivers/remoteproc/ti_k3_m4_remoteproc.c
@@ -433,11 +433,9 @@ static int k3_m4_reserved_mem_init(struct k3_m4_rproc *kproc)
 			return -EINVAL;

 		rmem = of_reserved_mem_lookup(rmem_np);
-		if (!rmem) {
-			of_node_put(rmem_np);
-			return -EINVAL;
-		}
 		of_node_put(rmem_np);
+		if (!rmem)
+			return -EINVAL;

 		kproc->rmem[i].bus_addr = rmem->base;
 		/* 64-bit address regions currently not supported */
diff --git a/drivers/remoteproc/ti_k3_r5_remoteproc.c b/drivers/remoteproc/ti_k3_r5_remoteproc.c
index 747ee467da88..d0ebdd5cfa70 100644
--- a/drivers/remoteproc/ti_k3_r5_remoteproc.c
+++ b/drivers/remoteproc/ti_k3_r5_remoteproc.c
@@ -1001,12 +1001,11 @@ static int k3_r5_reserved_mem_init(struct k3_r5_rproc *kproc)
 		}

 		rmem = of_reserved_mem_lookup(rmem_np);
+		of_node_put(rmem_np);
 		if (!rmem) {
-			of_node_put(rmem_np);
 			ret = -EINVAL;
 			goto unmap_rmem;
 		}
-		of_node_put(rmem_np);

 		kproc->rmem[i].bus_addr = rmem->base;
 		/*
--
2.46.1

Re: [PATCH] remoteproc: k3: Call of_node_put(rmem_np) only once in three functions

Posted by Mathieu Poirier 1 year, 4 months ago

On Tue, Sep 24, 2024 at 02:43:40PM +0200, Markus Elfring wrote:
> From: Markus Elfring <elfring@users.sourceforge.net>
> Date: Tue, 24 Sep 2024 14:28:35 +0200
> 
> An of_node_put(rmem_np) call was immediately used after a pointer check
> for a of_reserved_mem_lookup() call in three function implementations.
> Thus call such a function only once instead directly before the checks.
> 
> This issue was transformed by using the Coccinelle software.
> 
> Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
> ---
>  drivers/remoteproc/ti_k3_dsp_remoteproc.c | 6 ++----
>  drivers/remoteproc/ti_k3_m4_remoteproc.c  | 6 ++----
>  drivers/remoteproc/ti_k3_r5_remoteproc.c  | 3 +--
>  3 files changed, 5 insertions(+), 10 deletions(-)
>

Applied.

Thanks,
Mathieu

> diff --git a/drivers/remoteproc/ti_k3_dsp_remoteproc.c b/drivers/remoteproc/ti_k3_dsp_remoteproc.c
> index 8be3f631c192..d08a3a98ada1 100644
> --- a/drivers/remoteproc/ti_k3_dsp_remoteproc.c
> +++ b/drivers/remoteproc/ti_k3_dsp_remoteproc.c
> @@ -576,11 +576,9 @@ static int k3_dsp_reserved_mem_init(struct k3_dsp_rproc *kproc)
>  			return -EINVAL;
> 
>  		rmem = of_reserved_mem_lookup(rmem_np);
> -		if (!rmem) {
> -			of_node_put(rmem_np);
> -			return -EINVAL;
> -		}
>  		of_node_put(rmem_np);
> +		if (!rmem)
> +			return -EINVAL;
> 
>  		kproc->rmem[i].bus_addr = rmem->base;
>  		/* 64-bit address regions currently not supported */
> diff --git a/drivers/remoteproc/ti_k3_m4_remoteproc.c b/drivers/remoteproc/ti_k3_m4_remoteproc.c
> index 09f0484a90e1..a16fb165fced 100644
> --- a/drivers/remoteproc/ti_k3_m4_remoteproc.c
> +++ b/drivers/remoteproc/ti_k3_m4_remoteproc.c
> @@ -433,11 +433,9 @@ static int k3_m4_reserved_mem_init(struct k3_m4_rproc *kproc)
>  			return -EINVAL;
> 
>  		rmem = of_reserved_mem_lookup(rmem_np);
> -		if (!rmem) {
> -			of_node_put(rmem_np);
> -			return -EINVAL;
> -		}
>  		of_node_put(rmem_np);
> +		if (!rmem)
> +			return -EINVAL;
> 
>  		kproc->rmem[i].bus_addr = rmem->base;
>  		/* 64-bit address regions currently not supported */
> diff --git a/drivers/remoteproc/ti_k3_r5_remoteproc.c b/drivers/remoteproc/ti_k3_r5_remoteproc.c
> index 747ee467da88..d0ebdd5cfa70 100644
> --- a/drivers/remoteproc/ti_k3_r5_remoteproc.c
> +++ b/drivers/remoteproc/ti_k3_r5_remoteproc.c
> @@ -1001,12 +1001,11 @@ static int k3_r5_reserved_mem_init(struct k3_r5_rproc *kproc)
>  		}
> 
>  		rmem = of_reserved_mem_lookup(rmem_np);
> +		of_node_put(rmem_np);
>  		if (!rmem) {
> -			of_node_put(rmem_np);
>  			ret = -EINVAL;
>  			goto unmap_rmem;
>  		}
> -		of_node_put(rmem_np);
> 
>  		kproc->rmem[i].bus_addr = rmem->base;
>  		/*
> --
> 2.46.1
>

Re: [PATCH] remoteproc: k3: Call of_node_put(rmem_np) only once in three functions

Posted by Andrew Davis 1 year, 4 months ago

On 9/24/24 7:43 AM, Markus Elfring wrote:
> From: Markus Elfring <elfring@users.sourceforge.net>
> Date: Tue, 24 Sep 2024 14:28:35 +0200
> 
> An of_node_put(rmem_np) call was immediately used after a pointer check
> for a of_reserved_mem_lookup() call in three function implementations.
> Thus call such a function only once instead directly before the checks.
> 
> This issue was transformed by using the Coccinelle software.
> 

Quick check of all the users of of_reserved_mem_lookup(), they almost
all do the same thing, get the phandle, mem_lookup, then node_put.

Maybe a helper function like this:

struct reserved_mem *of_reserved_mem_region_lookup(const struct device_node *node, int index)
{
	struct device_node *np;
	struct reserved_mem *rmem;

	np = of_parse_phandle(node, "memory-region", index);
	if (!np)
		return ERR_PTR(-ENODEV);

	rmem = of_reserved_mem_lookup(np);
	of_node_put(np);
	if (!rmem)
		return ERR_PTR(-EINVAL);

	return rmem;
}

Added to of_reserved_mem.c would allow us to clean up these cases in
this patch, and then several more spots (and also help force standard
property name usage).

Andrew

> Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
> ---
>   drivers/remoteproc/ti_k3_dsp_remoteproc.c | 6 ++----
>   drivers/remoteproc/ti_k3_m4_remoteproc.c  | 6 ++----
>   drivers/remoteproc/ti_k3_r5_remoteproc.c  | 3 +--
>   3 files changed, 5 insertions(+), 10 deletions(-)
> 
> diff --git a/drivers/remoteproc/ti_k3_dsp_remoteproc.c b/drivers/remoteproc/ti_k3_dsp_remoteproc.c
> index 8be3f631c192..d08a3a98ada1 100644
> --- a/drivers/remoteproc/ti_k3_dsp_remoteproc.c
> +++ b/drivers/remoteproc/ti_k3_dsp_remoteproc.c
> @@ -576,11 +576,9 @@ static int k3_dsp_reserved_mem_init(struct k3_dsp_rproc *kproc)
>   			return -EINVAL;
> 
>   		rmem = of_reserved_mem_lookup(rmem_np);
> -		if (!rmem) {
> -			of_node_put(rmem_np);
> -			return -EINVAL;
> -		}
>   		of_node_put(rmem_np);
> +		if (!rmem)
> +			return -EINVAL;
> 
>   		kproc->rmem[i].bus_addr = rmem->base;
>   		/* 64-bit address regions currently not supported */
> diff --git a/drivers/remoteproc/ti_k3_m4_remoteproc.c b/drivers/remoteproc/ti_k3_m4_remoteproc.c
> index 09f0484a90e1..a16fb165fced 100644
> --- a/drivers/remoteproc/ti_k3_m4_remoteproc.c
> +++ b/drivers/remoteproc/ti_k3_m4_remoteproc.c
> @@ -433,11 +433,9 @@ static int k3_m4_reserved_mem_init(struct k3_m4_rproc *kproc)
>   			return -EINVAL;
> 
>   		rmem = of_reserved_mem_lookup(rmem_np);
> -		if (!rmem) {
> -			of_node_put(rmem_np);
> -			return -EINVAL;
> -		}
>   		of_node_put(rmem_np);
> +		if (!rmem)
> +			return -EINVAL;
> 
>   		kproc->rmem[i].bus_addr = rmem->base;
>   		/* 64-bit address regions currently not supported */
> diff --git a/drivers/remoteproc/ti_k3_r5_remoteproc.c b/drivers/remoteproc/ti_k3_r5_remoteproc.c
> index 747ee467da88..d0ebdd5cfa70 100644
> --- a/drivers/remoteproc/ti_k3_r5_remoteproc.c
> +++ b/drivers/remoteproc/ti_k3_r5_remoteproc.c
> @@ -1001,12 +1001,11 @@ static int k3_r5_reserved_mem_init(struct k3_r5_rproc *kproc)
>   		}
> 
>   		rmem = of_reserved_mem_lookup(rmem_np);
> +		of_node_put(rmem_np);
>   		if (!rmem) {
> -			of_node_put(rmem_np);
>   			ret = -EINVAL;
>   			goto unmap_rmem;
>   		}
> -		of_node_put(rmem_np);
> 
>   		kproc->rmem[i].bus_addr = rmem->base;
>   		/*
> --
> 2.46.1
>

Re: [PATCH] remoteproc: k3: Call of_node_put(rmem_np) only once in three functions

Posted by Martyn Welch 1 year, 4 months ago

On Tue, 2024-09-24 at 14:43 +0200, Markus Elfring wrote:
> From: Markus Elfring <elfring@users.sourceforge.net>
> Date: Tue, 24 Sep 2024 14:28:35 +0200
> 
> An of_node_put(rmem_np) call was immediately used after a pointer
> check
> for a of_reserved_mem_lookup() call in three function
> implementations.
> Thus call such a function only once instead directly before the
> checks.
> 
> This issue was transformed by using the Coccinelle software.
> 
> Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>

reviewed-by: Martyn Welch <martyn.welch@collabora.com>

> ---
>  drivers/remoteproc/ti_k3_dsp_remoteproc.c | 6 ++----
>  drivers/remoteproc/ti_k3_m4_remoteproc.c  | 6 ++----
>  drivers/remoteproc/ti_k3_r5_remoteproc.c  | 3 +--
>  3 files changed, 5 insertions(+), 10 deletions(-)
> 
> diff --git a/drivers/remoteproc/ti_k3_dsp_remoteproc.c
> b/drivers/remoteproc/ti_k3_dsp_remoteproc.c
> index 8be3f631c192..d08a3a98ada1 100644
> --- a/drivers/remoteproc/ti_k3_dsp_remoteproc.c
> +++ b/drivers/remoteproc/ti_k3_dsp_remoteproc.c
> @@ -576,11 +576,9 @@ static int k3_dsp_reserved_mem_init(struct
> k3_dsp_rproc *kproc)
>  			return -EINVAL;
> 
>  		rmem = of_reserved_mem_lookup(rmem_np);
> -		if (!rmem) {
> -			of_node_put(rmem_np);
> -			return -EINVAL;
> -		}
>  		of_node_put(rmem_np);
> +		if (!rmem)
> +			return -EINVAL;
> 
>  		kproc->rmem[i].bus_addr = rmem->base;
>  		/* 64-bit address regions currently not supported */
> diff --git a/drivers/remoteproc/ti_k3_m4_remoteproc.c
> b/drivers/remoteproc/ti_k3_m4_remoteproc.c
> index 09f0484a90e1..a16fb165fced 100644
> --- a/drivers/remoteproc/ti_k3_m4_remoteproc.c
> +++ b/drivers/remoteproc/ti_k3_m4_remoteproc.c
> @@ -433,11 +433,9 @@ static int k3_m4_reserved_mem_init(struct
> k3_m4_rproc *kproc)
>  			return -EINVAL;
> 
>  		rmem = of_reserved_mem_lookup(rmem_np);
> -		if (!rmem) {
> -			of_node_put(rmem_np);
> -			return -EINVAL;
> -		}
>  		of_node_put(rmem_np);
> +		if (!rmem)
> +			return -EINVAL;
> 
>  		kproc->rmem[i].bus_addr = rmem->base;
>  		/* 64-bit address regions currently not supported */
> diff --git a/drivers/remoteproc/ti_k3_r5_remoteproc.c
> b/drivers/remoteproc/ti_k3_r5_remoteproc.c
> index 747ee467da88..d0ebdd5cfa70 100644
> --- a/drivers/remoteproc/ti_k3_r5_remoteproc.c
> +++ b/drivers/remoteproc/ti_k3_r5_remoteproc.c
> @@ -1001,12 +1001,11 @@ static int k3_r5_reserved_mem_init(struct
> k3_r5_rproc *kproc)
>  		}
> 
>  		rmem = of_reserved_mem_lookup(rmem_np);
> +		of_node_put(rmem_np);
>  		if (!rmem) {
> -			of_node_put(rmem_np);
>  			ret = -EINVAL;
>  			goto unmap_rmem;
>  		}
> -		of_node_put(rmem_np);
> 
>  		kproc->rmem[i].bus_addr = rmem->base;
>  		/*
> --
> 2.46.1
>