On 2018-11-01 23:17, Jayant Shekhar wrote:
In case of msm drm bind failure, dpu_mdss_destroy is triggered.
In this function, resources are freed and pm runtime disable is
called, which triggers dpu_mdss_disable. Now in dpu_mdss_disable,
driver tries to access a memory which is already freed. This
results in kernel panic. Fix this by ensuring proper sequence
of dpu destroy and disable calls.
Change-Id: Id6e01a537ae9c40789c5752dc28c397391ab7dfe
Please strip down Change-Id before posting the patch.
Signed-off-by: Jayant Shekhar <jshekhar@xxxxxxxxxxxxxx>
---
drivers/gpu/drm/msm/disp/dpu1/dpu_mdss.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_mdss.c
b/drivers/gpu/drm/msm/disp/dpu1/dpu_mdss.c
index fd9c893..cd9a6bd 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_mdss.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_mdss.c
@@ -156,6 +156,8 @@ static void dpu_mdss_destroy(struct drm_device
*dev)
struct dpu_mdss *dpu_mdss = to_dpu_mdss(priv->mdss);
struct dss_module_power *mp = &dpu_mdss->mp;
+ pm_runtime_disable(dev->dev);
+
_dpu_mdss_irq_domain_fini(dpu_mdss);
free_irq(platform_get_irq(pdev, 0), dpu_mdss);
@@ -167,7 +169,6 @@ static void dpu_mdss_destroy(struct drm_device
*dev)
devm_iounmap(&pdev->dev, dpu_mdss->mmio);
dpu_mdss->mmio = NULL;
Lots of double line spacing. Get rid of them.
- pm_runtime_disable(dev->dev);
priv->mdss = NULL;
}
Also drop "DPU PATCH" prefix.
--
Jeykumar s
