[v1] drm: xlnx: zynqmp_disp: layer may be null while releasing

[PATCH] drm: xlnx: zynqmp_disp: layer may be null while releasing

Posted by Steffen Dirkwinkel 1 month ago

From: Steffen Dirkwinkel <s.dirkwinkel@beckhoff.com>

layer->info can be null if we have an error on the first layer in
zynqmp_disp_create_layers

Signed-off-by: Steffen Dirkwinkel <s.dirkwinkel@beckhoff.com>
---
 drivers/gpu/drm/xlnx/zynqmp_disp.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/xlnx/zynqmp_disp.c b/drivers/gpu/drm/xlnx/zynqmp_disp.c
index 9368acf56eaf..e4e0e299e8a7 100644
--- a/drivers/gpu/drm/xlnx/zynqmp_disp.c
+++ b/drivers/gpu/drm/xlnx/zynqmp_disp.c
@@ -1200,6 +1200,9 @@ static void zynqmp_disp_layer_release_dma(struct zynqmp_disp *disp,
 {
 	unsigned int i;
 
+	if (!layer->info)
+		return;
+
 	for (i = 0; i < layer->info->num_channels; i++) {
 		struct zynqmp_disp_layer_dma *dma = &layer->dmas[i];
 
-- 
2.47.0

Re: [PATCH] drm: xlnx: zynqmp_disp: layer may be null while releasing

Posted by Tomi Valkeinen 1 month ago

Hi,

On 21/10/2024 16:51, Steffen Dirkwinkel wrote:
> From: Steffen Dirkwinkel <s.dirkwinkel@beckhoff.com>
> 
> layer->info can be null if we have an error on the first layer in
> zynqmp_disp_create_layers
> 
> Signed-off-by: Steffen Dirkwinkel <s.dirkwinkel@beckhoff.com>
> ---
>   drivers/gpu/drm/xlnx/zynqmp_disp.c | 3 +++
>   1 file changed, 3 insertions(+)
> 
> diff --git a/drivers/gpu/drm/xlnx/zynqmp_disp.c b/drivers/gpu/drm/xlnx/zynqmp_disp.c
> index 9368acf56eaf..e4e0e299e8a7 100644
> --- a/drivers/gpu/drm/xlnx/zynqmp_disp.c
> +++ b/drivers/gpu/drm/xlnx/zynqmp_disp.c
> @@ -1200,6 +1200,9 @@ static void zynqmp_disp_layer_release_dma(struct zynqmp_disp *disp,
>   {
>   	unsigned int i;
>   
> +	if (!layer->info)
> +		return;
> +
>   	for (i = 0; i < layer->info->num_channels; i++) {
>   		struct zynqmp_disp_layer_dma *dma = &layer->dmas[i];
>   

I think this should also have the Fixes tag, but probably not stable 
material.

  Tomi

[PATCH v2] drm: xlnx: zynqmp_disp: layer may be null while releasing

Posted by Steffen Dirkwinkel 4 weeks ago

From: Steffen Dirkwinkel <s.dirkwinkel@beckhoff.com>

layer->info can be null if we have an error on the first layer in
zynqmp_disp_create_layers

Fixes: 1836fd5ed98d ("drm: xlnx: zynqmp_dpsub: Minimize usage of global flag")
Signed-off-by: Steffen Dirkwinkel <s.dirkwinkel@beckhoff.com>
---
 drivers/gpu/drm/xlnx/zynqmp_disp.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/xlnx/zynqmp_disp.c b/drivers/gpu/drm/xlnx/zynqmp_disp.c
index 9368acf56eaf..e4e0e299e8a7 100644
--- a/drivers/gpu/drm/xlnx/zynqmp_disp.c
+++ b/drivers/gpu/drm/xlnx/zynqmp_disp.c
@@ -1200,6 +1200,9 @@ static void zynqmp_disp_layer_release_dma(struct zynqmp_disp *disp,
 {
 	unsigned int i;
 
+	if (!layer->info)
+		return;
+
 	for (i = 0; i < layer->info->num_channels; i++) {
 		struct zynqmp_disp_layer_dma *dma = &layer->dmas[i];
 
-- 
2.47.0

Re: [PATCH v2] drm: xlnx: zynqmp_disp: layer may be null while releasing

Posted by Tomi Valkeinen 3 weeks, 5 days ago

Hi,

On 28/10/2024 15:39, Steffen Dirkwinkel wrote:
> From: Steffen Dirkwinkel <s.dirkwinkel@beckhoff.com>
> 
> layer->info can be null if we have an error on the first layer in
> zynqmp_disp_create_layers
> 
> Fixes: 1836fd5ed98d ("drm: xlnx: zynqmp_dpsub: Minimize usage of global flag")
> Signed-off-by: Steffen Dirkwinkel <s.dirkwinkel@beckhoff.com>
> ---
>   drivers/gpu/drm/xlnx/zynqmp_disp.c | 3 +++
>   1 file changed, 3 insertions(+)
> 
> diff --git a/drivers/gpu/drm/xlnx/zynqmp_disp.c b/drivers/gpu/drm/xlnx/zynqmp_disp.c
> index 9368acf56eaf..e4e0e299e8a7 100644
> --- a/drivers/gpu/drm/xlnx/zynqmp_disp.c
> +++ b/drivers/gpu/drm/xlnx/zynqmp_disp.c
> @@ -1200,6 +1200,9 @@ static void zynqmp_disp_layer_release_dma(struct zynqmp_disp *disp,
>   {
>   	unsigned int i;
>   
> +	if (!layer->info)
> +		return;
> +
>   	for (i = 0; i < layer->info->num_channels; i++) {
>   		struct zynqmp_disp_layer_dma *dma = &layer->dmas[i];
>   


Thanks, will apply to drm-misc-next.

  Tomi