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| author | Peter Griffin <peter.griffin@linaro.org> | 2019-04-19 10:33:01 +0200 |
|---|---|---|
| committer | Qiang Yu <yuq825@gmail.com> | 2019-04-20 10:14:09 +0200 |
| commit | 409c53f07a81f8db122c461f3255c6f43558c881 (patch) | |
| tree | deb704b9cd1d646bdbd6c9475a624f2845d886f6 /drivers/gpu | |
| parent | drm: increase drm mmap_range size to 1TB (diff) | |
| download | linux-409c53f07a81f8db122c461f3255c6f43558c881.tar.xz linux-409c53f07a81f8db122c461f3255c6f43558c881.zip | |
drm/lima: handle shared irq case for lima_pp_bcast_irq_handler
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.griffin@linaro.org>
Cc: Rob Herring <robh@kernel.org>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: Qiang Yu <yuq825@gmail.com>
Signed-off-by: Qiang Yu <yuq825@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1555662781-22570-7-git-send-email-peter.griffin@linaro.org
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/lima/lima_pp.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/gpu/drm/lima/lima_pp.c b/drivers/gpu/drm/lima/lima_pp.c index d29721e177bf..8fef224b93c8 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]; |