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drm/vmwgfx: Use dma_buf from GEM object instance

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Avoid dereferencing struct drm_gem_object.import_attach for the
imported dma-buf. The dma_buf field in the GEM object instance refers
to the same buffer. Prepares to make import_attach optional.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Cc: Zack Rusin <zack.rusin@broadcom.com>
Cc: Broadcom internal kernel review list <bcm-kernel-feedback-list@broadcom.com>
Reviewed-by: Zack Rusin <zack.rusin@broadcom.com>
Link: https://lore.kernel.org/r/20250317131923.238374-15-tzimmermann@suse.de
This commit is contained in:
Thomas Zimmermann
2025-03-17 14:06:52 +01:00
parent 5a80b00d0d
commit aec8a40228
1 changed files with 3 additions and 3 deletions
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6
drivers/gpu/drm/vmwgfx/vmwgfx_gem.c
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@@ -85,10 +85,10 @@ static int vmw_gem_vmap(struct drm_gem_object *obj, struct iosys_map *map)
int ret;
if (drm_gem_is_imported(obj)) {
ret = dma_buf_vmap(obj->import_attach->dmabuf, map);
ret = dma_buf_vmap(obj->dma_buf, map);
if (!ret) {
if (drm_WARN_ON(obj->dev, map->is_iomem)) {
dma_buf_vunmap(obj->import_attach->dmabuf, map);
dma_buf_vunmap(obj->dma_buf, map);
return -EIO;
}
}
@@ -102,7 +102,7 @@ static int vmw_gem_vmap(struct drm_gem_object *obj, struct iosys_map *map)
static void vmw_gem_vunmap(struct drm_gem_object *obj, struct iosys_map *map)
{
if (drm_gem_is_imported(obj))
dma_buf_vunmap(obj->import_attach->dmabuf, map);
dma_buf_vunmap(obj->dma_buf, map);
else
drm_gem_ttm_vunmap(obj, map);
}