[PATCH] drm/bridge: waveshare-dsi: Fix bailout for devm_drm_bridge_alloc()

[Liu Ying]

devm_drm_bridge_alloc() returns ERR_PTR on failure instead of a
NULL pointer, so use IS_ERR() to check the returned pointer and
turn proper error code on failure by using PTR_ERR().

Fixes: dbdea37add13 ("drm: bridge: Add waveshare DSI2DPI unit driver")
Signed-off-by: Liu Ying <victor....@nxp.com>
---
 drivers/gpu/drm/bridge/waveshare-dsi.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/bridge/waveshare-dsi.c 
b/drivers/gpu/drm/bridge/waveshare-dsi.c
index 01c70e7d3d3b..43f4e7412d72 100644
--- a/drivers/gpu/drm/bridge/waveshare-dsi.c
+++ b/drivers/gpu/drm/bridge/waveshare-dsi.c
@@ -147,8 +147,8 @@ static int ws_bridge_probe(struct i2c_client *i2c)
        int ret;
 
        ws = devm_drm_bridge_alloc(dev, struct ws_bridge, bridge, 
&ws_bridge_bridge_funcs);
-       if (!ws)
-               return -ENOMEM;
+       if (IS_ERR(ws))
+               return PTR_ERR(ws);
 
        ws->dev = dev;
 
-- 
2.34.1