[Freedreno] [PATCH v2 3/6] drm/msm/a6xx: Check for ERR or NULL before iounmap

[Sean Paul]

From: Sean Paul <seanpaul at chromium.org>

pdcptr and seqptr aren't necessarily valid, check them before trying to
unmap them.

Changes in v2:
- None

Cc: Jordan Crouse <jcrouse at codeaurora.org>
Signed-off-by: Sean Paul <seanpaul at chromium.org>
---
 drivers/gpu/drm/msm/adreno/a6xx_gmu.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gmu.c b/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
index 742c8ff9a61c..7465423e9b71 100644
--- a/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
+++ b/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
@@ -504,8 +504,10 @@ static void a6xx_gmu_rpmh_init(struct a6xx_gmu *gmu)
 	wmb();
 
 err:
-	devm_iounmap(gmu->dev, pdcptr);
-	devm_iounmap(gmu->dev, seqptr);
+	if (!IS_ERR_OR_NULL(pdcptr))
+		devm_iounmap(gmu->dev, pdcptr);
+	if (!IS_ERR_OR_NULL(seqptr))
+		devm_iounmap(gmu->dev, seqptr);
 }
 
 /*
-- 
Sean Paul, Software Engineer, Google / Chromium OS