[v3,06/19] drm/msm/dsi: initialize postdiv_lock before use for 10nm pll

Commit Message

Sean Paul July 20, 2018, 8:42 p.m. UTC

From: Rajesh Yadav <[e-mail]>

postdiv_lock spinlock was used before initialization
for 10nm pll. It causes following spin_bug:
	"BUG: spinlock bad magic on CPU#0".
Initialize spinlock before its usage.

Changes in v3:
- Added Archit's R-b

Reviewed-by: Archit Taneja <[e-mail]>
Signed-off-by: Rajesh Yadav <[e-mail]>
Signed-off-by: Sean Paul <[e-mail]>
---
 drivers/gpu/drm/msm/dsi/pll/dsi_pll_10nm.c | 2 ++
 1 file changed, 2 insertions(+)

Patch

diff --git a/drivers/gpu/drm/msm/dsi/pll/dsi_pll_10nm.c b/drivers/gpu/drm/msm/dsi/pll/dsi_pll_10nm.c
index c4c37a7df637..4c03f0b7343e 100644
--- a/drivers/gpu/drm/msm/dsi/pll/dsi_pll_10nm.c
+++ b/drivers/gpu/drm/msm/dsi/pll/dsi_pll_10nm.c
@@ -798,6 +798,8 @@  struct msm_dsi_pll *msm_dsi_pll_10nm_init(struct platform_device *pdev, int id)
 		return ERR_PTR(-ENOMEM);
 	}
 
+	spin_lock_init(&pll_10nm->postdiv_lock);
+
 	pll = &pll_10nm->base;
 	pll->min_rate = 1000000000UL;
 	pll->max_rate = 3500000000UL;