drm/msm/dpu: Add callback function pointer check before its call

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[ Upstream commit 530f272053 ]

In dpu_core_irq_callback_handler() callback function pointer is compared to NULL,
but then callback function is unconditionally called by this pointer.
Fix this bug by adding conditional return.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Fixes: c929ac60b3 ("drm/msm/dpu: allow just single IRQ callback")
Signed-off-by: Aleksandr Mishin <amishin@t-argos.ru>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/588237/
Link: https://lore.kernel.org/r/20240408085523.12231-1-amishin@t-argos.ru
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Aleksandr Mishin 2024-04-08 11:55:23 +03:00 • committed by Greg Kroah-Hartman

parent 04c2fca455

commit 873f676991

1 changed files with 3 additions and 1 deletions

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drivers/gpu/drm/msm/disp/dpu1/dpu_hw_interrupts.c

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