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drm/msm: fix NULL-deref on irq uninstall

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In case of early initialisation errors and on platforms that do not use
the DPU controller, the deinitilisation code can be called with the kms
pointer set to NULL.

Fixes: f026e431cf ("drm/msm: Convert to Linux IRQ interfaces")
Cc: stable@vger.kernel.org	# 5.14
Cc: Thomas Zimmermann <tzimmermann@suse.de>
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/525104/
Link: https://lore.kernel.org/r/20230306100722.28485-5-johan+linaro@kernel.org
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
This commit is contained in:
Johan Hovold 2023-03-06 11:07:16 +01:00 committed by Dmitry Baryshkov
parent a465353b92
commit cd459c005d
1 changed files with 5 additions and 3 deletions
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2
drivers/gpu/drm/msm/msm_drv.c
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@ -252,9 +252,11 @@ static int msm_drm_uninit(struct device *dev)
drm_bridge_remove(priv->bridges[i]);
priv->num_bridges = 0;
if (kms) {
pm_runtime_get_sync(dev);
msm_irq_uninstall(ddev);
pm_runtime_put_sync(dev);
}
if (kms && kms->funcs)
kms->funcs->destroy(kms);