The driver is currently missing to fully clean up after itself. Ensure
that the mutex is cleaned up.

Fixes: 86eecc3a9c2e ("drm/bridge: synopsys: Add DW DPTX Controller support 
library")
Reported-by: Sashiko <[email protected]>
Signed-off-by: Sebastian Reichel <[email protected]>
---
 drivers/gpu/drm/bridge/synopsys/dw-dp.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/bridge/synopsys/dw-dp.c 
b/drivers/gpu/drm/bridge/synopsys/dw-dp.c
index 52e3b37259a6..b1856418f441 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-dp.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-dp.c
@@ -2040,10 +2040,13 @@ struct dw_dp *dw_dp_probe(struct platform_device *pdev, 
const struct dw_dp_plat_
        dp->pixel_mode = plat_data->pixel_mode;
        dp->plat_data.max_link_rate = plat_data->max_link_rate;
 
-       mutex_init(&dp->irq_lock);
        INIT_WORK(&dp->hpd_work, dw_dp_hpd_work);
        init_completion(&dp->complete);
 
+       ret = devm_mutex_init(dev, &dp->irq_lock);
+       if (ret)
+               return ERR_PTR(ret);
+
        res = devm_platform_ioremap_resource(pdev, 0);
        if (IS_ERR(res))
                return ERR_CAST(res);

-- 
2.53.0

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