[PATCH] drm: Use IS_ERR() instead of null pointer check

[Wang Qing]

a6xx_gmu_get_mmio() never return null in case of error, but ERR_PTR(),
so we should use IS_ERR() instead of null pointer check

Signed-off-by: Wang Qing <wangqing at vivo.com>
---
 drivers/gpu/drm/msm/adreno/a6xx_gmu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gmu.c b/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
index 491fee4..8c81a89
--- a/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
+++ b/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
@@ -492,7 +492,7 @@ static void a6xx_gmu_rpmh_init(struct a6xx_gmu *gmu)
 	void __iomem *seqptr = a6xx_gmu_get_mmio(pdev, "gmu_pdc_seq");
 	uint32_t pdc_address_offset;
 
-	if (!pdcptr || !seqptr)
+	if (IS_ERR(pdcptr) || IS_ERR(seqptr))
 		goto err;
 
 	if (adreno_is_a618(adreno_gpu) || adreno_is_a640(adreno_gpu))
-- 
2.7.4