drm/bridge: analogix_dp: Fix bailout for devm_drm_bridge_alloc()

devm_drm_bridge_alloc() returns ERR_PTR on failure instead of a
NULL pointer, so use IS_ERR() to check the returned pointer.
While at it, on failure, return ERR_CAST(dp) instead of
ERR_PTR(-ENOMEM) in order not to depend on devm_drm_bridge_alloc()
error code implementation.

Fixes: 48f05c3b4b70 ("drm/bridge: analogix_dp: Use devm_drm_bridge_alloc() API")
Signed-off-by: Liu Ying <victor.liu@nxp.com>
Reviewed-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Link: https://lore.kernel.org/r/20250806095224.527938-1-victor.liu@nxp.com

diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
index ed35e567d11729770b275d19e6f92d436b5e956b..efe534977d12de3383390fb3040bbfa4a99064cc 100644 (file)
--- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
+++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
@@ -1474,8 +1474,8 @@ analogix_dp_probe(struct device *dev, struct analogix_dp_plat_data *plat_data)
 
        dp = devm_drm_bridge_alloc(dev, struct analogix_dp_device, bridge,
                                   &analogix_dp_bridge_funcs);
-       if (!dp)
-               return ERR_PTR(-ENOMEM);
+       if (IS_ERR(dp))
+               return ERR_CAST(dp);
 
        dp->dev = &pdev->dev;
        dp->dpms_mode = DRM_MODE_DPMS_OFF;