4.14-stable review patch. If anyone has any objections, please let me know.
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From: Kieran Bingham kieran.bingham@ideasonboard.com
commit 639fa43d59e5a41ca8c55592cd5c1021fea2ab83 upstream.
When a BRx is provided by a pipeline, the WPF must determine the master layer. Currently the condition to check this identifies pipe->bru || pipe->num_inputs > 1.
The code then moves on to dereference pipe->bru, thus the check fails static analysers on the possibility that pipe->num_inputs could be greater than 1 without pipe->bru being set.
The reality is that the pipeline must have a BRx to support more than one input, thus this could never cause a fault - however it also identifies that the num_inputs > 1 check is redundant.
Remove the redundant check - and always configure the master layer appropriately when we have a BRx configured in our pipeline.
Fixes: 6134148f6098 ("v4l: vsp1: Add support for the BRS entity")
Cc: stable@vger.kernel.org Suggested-by: Mauro Carvalho Chehab mchehab@s-opensource.com Signed-off-by: Kieran Bingham kieran.bingham+renesas@ideasonboard.com Reviewed-by: Laurent Pinchart laurent.pinchart@ideasonboard.com Signed-off-by: Mauro Carvalho Chehab mchehab@s-opensource.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/media/platform/vsp1/vsp1_wpf.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/media/platform/vsp1/vsp1_wpf.c +++ b/drivers/media/platform/vsp1/vsp1_wpf.c @@ -452,7 +452,7 @@ static void wpf_configure(struct vsp1_en : VI6_WPF_SRCRPF_RPF_ACT_SUB(input->entity.index); }
- if (pipe->bru || pipe->num_inputs > 1) + if (pipe->bru) srcrpf |= pipe->bru->type == VSP1_ENTITY_BRU ? VI6_WPF_SRCRPF_VIRACT_MST : VI6_WPF_SRCRPF_VIRACT2_MST;