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Subject[PATCH v3 2/2] drm/panfrost: Use drm_gem_shmem_map_offset()
Date
panfrost_ioctl_mmap_bo() contains a reimplementation of
drm_gem_map_offset() but with a bug - it allows mapping imported objects
(without going through the exporter). Fix this by switching to use the
newly renamed drm_gem_map_offset() function instead which has the bonus
of simplifying the code.

CC: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Signed-off-by: Steven Price <steven.price@arm.com>
Reviewed-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
---
drivers/gpu/drm/panfrost/panfrost_drv.c | 16 ++--------------
1 file changed, 2 insertions(+), 14 deletions(-)

diff --git a/drivers/gpu/drm/panfrost/panfrost_drv.c b/drivers/gpu/drm/panfrost/panfrost_drv.c
index d11e2281dde6..8be0cd5d6c7a 100644
--- a/drivers/gpu/drm/panfrost/panfrost_drv.c
+++ b/drivers/gpu/drm/panfrost/panfrost_drv.c
@@ -255,26 +255,14 @@ static int panfrost_ioctl_mmap_bo(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct drm_panfrost_mmap_bo *args = data;
- struct drm_gem_object *gem_obj;
- int ret;

if (args->flags != 0) {
DRM_INFO("unknown mmap_bo flags: %d\n", args->flags);
return -EINVAL;
}

- gem_obj = drm_gem_object_lookup(file_priv, args->handle);
- if (!gem_obj) {
- DRM_DEBUG("Failed to look up GEM BO %d\n", args->handle);
- return -ENOENT;
- }
-
- ret = drm_gem_create_mmap_offset(gem_obj);
- if (ret == 0)
- args->offset = drm_vma_node_offset_addr(&gem_obj->vma_node);
- drm_gem_object_put_unlocked(gem_obj);
-
- return ret;
+ return drm_gem_map_offset(file_priv, dev, args->handle,
+ &args->offset);
}

static int panfrost_ioctl_get_bo_offset(struct drm_device *dev, void *data,
--
2.20.1
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