linux-kernel - [PATCH v7 1/2] drm/panfrost: Put mapping instead of shmem obj on panfrost_mmu_map_fault

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Message-Id: <20220630200601.1884120-2-dmitry.osipenko@collabora.com>
Date:   Thu, 30 Jun 2022 23:06:00 +0300
From:   Dmitry Osipenko <dmitry.osipenko@...labora.com>
To:     David Airlie <airlied@...ux.ie>, Daniel Vetter <daniel@...ll.ch>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        Rob Herring <robh@...nel.org>,
        Steven Price <steven.price@....com>,
        Alyssa Rosenzweig <alyssa.rosenzweig@...labora.com>,
        Tomeu Vizoso <tomeu.vizoso@...labora.com>,
        Rob Clark <robdclark@...il.com>,
        Robin Murphy <robin.murphy@....com>
Cc:     dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        Dmitry Osipenko <digetx@...il.com>, kernel@...labora.com
Subject: [PATCH v7 1/2] drm/panfrost: Put mapping instead of shmem obj on panfrost_mmu_map_fault_addr() error

When panfrost_mmu_map_fault_addr() fails, the BO's mapping should be
unreferenced and not the shmem object which backs the mapping.

Cc: stable@...r.kernel.org
Fixes: bdefca2d8dc0 ("drm/panfrost: Add the panfrost_gem_mapping concept")
Reviewed-by: Steven Price <steven.price@....com>
Signed-off-by: Dmitry Osipenko <dmitry.osipenko@...labora.com>
---
 drivers/gpu/drm/panfrost/panfrost_mmu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/panfrost/panfrost_mmu.c b/drivers/gpu/drm/panfrost/panfrost_mmu.c
index d3f82b26a631..b285a8001b1d 100644
--- a/drivers/gpu/drm/panfrost/panfrost_mmu.c
+++ b/drivers/gpu/drm/panfrost/panfrost_mmu.c
@@ -518,7 +518,7 @@ static int panfrost_mmu_map_fault_addr(struct panfrost_device *pfdev, int as,
 err_pages:
 	drm_gem_shmem_put_pages(&bo->base);
 err_bo:
-	drm_gem_object_put(&bo->base.base);
+	panfrost_gem_mapping_put(bomapping);
 	return ret;
 }
 
-- 
2.36.1