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

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Message-Id: <1604629881-557-1-git-send-email-wangqing@vivo.com>
Date:   Fri,  6 Nov 2020 10:31:19 +0800
From:   Wang Qing <wangqing@...o.com>
To:     Rob Clark <robdclark@...il.com>, Sean Paul <sean@...rly.run>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Jordan Crouse <jcrouse@...eaurora.org>,
        Jonathan Marek <jonathan@...ek.ca>,
        Akhil P Oommen <akhilpo@...eaurora.org>,
        Sharat Masetty <smasetty@...eaurora.org>,
        linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        freedreno@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Cc:     Wang Qing <wangqing@...o.com>
Subject: [PATCH] drm: Use IS_ERR() instead of null pointer check

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@...o.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