[PATCH] ASoC: sti: fix return value check in uni_player_parse_dt_audio_glue()

[weiyj_lk]

From: Wei Yongjun <yongjun_...@trendmicro.com.cn>

In case of error, the function syscon_regmap_lookup_by_phandle() returns
ERR_PTR() and never returns NULL. The NULL test in the return value check
should be replaced with IS_ERR().

Signed-off-by: Wei Yongjun <yongjun_...@trendmicro.com.cn>
---
 sound/soc/sti/uniperif_player.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/sound/soc/sti/uniperif_player.c b/sound/soc/sti/uniperif_player.c
index ee1c7c2..1ac2db2 100644
--- a/sound/soc/sti/uniperif_player.c
+++ b/sound/soc/sti/uniperif_player.c
@@ -1029,9 +1029,9 @@ static int uni_player_parse_dt_audio_glue(struct 
platform_device *pdev,
 
        regmap = syscon_regmap_lookup_by_phandle(node, "st,syscfg");
 
-       if (!regmap) {
+       if (IS_ERR(regmap)) {
                dev_err(&pdev->dev, "sti-audio-clk-glue syscf not found\n");
-               return -EINVAL;
+               return PTR_ERR(regmap);
        }
 
        player->clk_sel = regmap_field_alloc(regmap, regfield[0]);