On Hikey board all lima ip blocks are shared with one irq.
This patch avoids a NULL ptr deref crash on this platform
on startup. Tested with Weston and kmscube.
Signed-off-by: Peter Griffin <peter.grif...@linaro.org>
Cc: Rob Herring <r...@kernel.org>
Cc: Daniel Vetter <dan...@ffwll.ch>
Cc: Qiang Yu <yuq...@gmail.com>
---
drivers/gpu/drm/lima/lima_pp.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/lima/lima_pp.c b/drivers/gpu/drm/lima/lima_pp.c
index d29721e..8fef224 100644
--- a/drivers/gpu/drm/lima/lima_pp.c
+++ b/drivers/gpu/drm/lima/lima_pp.c
@@ -64,7 +64,13 @@ static irqreturn_t lima_pp_bcast_irq_handler(int irq, void
*data)
struct lima_ip *pp_bcast = data;
struct lima_device *dev = pp_bcast->dev;
struct lima_sched_pipe *pipe = dev->pipe + lima_pipe_pp;
- struct drm_lima_m450_pp_frame *frame = pipe->current_task->frame;
+ struct drm_lima_m450_pp_frame *frame;
+
+ /* for shared irq case */
+ if (!pipe->current_task)
+ return IRQ_NONE;
+
+ frame = pipe->current_task->frame;
for (i = 0; i < frame->num_pp; i++) {
struct lima_ip *ip = pipe->processor[i];
--
2.7.4
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