[PATCH v2] drm/bridge: synopsys: dw-dp: Check return value of devm_drm_bridge_add() in dw_dp_bind()

[Chen Ni]

Return the value of devm_drm_bridge_add() in order to propagate the
error properly, if it fails due to resource allocation failure or bridge
registration failure.

This ensures that the bind function fails safely rather than proceeding
with a potentially incomplete bridge setup.

Fixes: b726970486d8 ("drm/bridge: synopsys: dw-dp: add bridge before attaching")
Signed-off-by: Chen Ni <nic...@iscas.ac.cn>
---
Changes in v2:
- Use ERR_PTR() instead of dev_err_ptr_probe().
---
 drivers/gpu/drm/bridge/synopsys/dw-dp.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/bridge/synopsys/dw-dp.c 
b/drivers/gpu/drm/bridge/synopsys/dw-dp.c
index 432342452484..29fcba7a47d3 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-dp.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-dp.c
@@ -2049,7 +2049,11 @@ struct dw_dp *dw_dp_bind(struct device *dev, struct 
drm_encoder *encoder,
        bridge->type = DRM_MODE_CONNECTOR_DisplayPort;
        bridge->ycbcr_420_allowed = true;
 
-       devm_drm_bridge_add(dev, bridge);
+       ret = devm_drm_bridge_add(dev, bridge);
+       if (ret) {
+               dev_err_probe(dev, ret, "failed to add bridge\n");
+               return ERR_PTR(ret);
+       }
 
        dp->aux.dev = dev;
        dp->aux.drm_dev = encoder->dev;
-- 
2.25.1