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authorGerd Hoffmann <kraxel@redhat.com>2021-02-17 15:32:13 +0300
committerGerd Hoffmann <kraxel@redhat.com>2021-02-19 11:13:25 +0300
commit0345bae1776b24e2b591f50b1bfe63001fd40efb (patch)
tree275dfc7f8bec1778c09582fffc9d22c94efbe038 /drivers/gpu/drm/qxl
parentb4b27f08f9f96d98040b37905bd9caf6b48b1430 (diff)
downloadlinux-0345bae1776b24e2b591f50b1bfe63001fd40efb.tar.xz
drm/qxl: add lock asserts to qxl_bo_vmap_locked + qxl_bo_vunmap_locked
Try avoid re-introducing locking bugs. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Acked-by: Thomas Zimmermann <tzimmermann@suse.de> Link: http://patchwork.freedesktop.org/patch/msgid/20210217123213.2199186-12-kraxel@redhat.com
Diffstat (limited to 'drivers/gpu/drm/qxl')
-rw-r--r--drivers/gpu/drm/qxl/qxl_object.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/gpu/drm/qxl/qxl_object.c b/drivers/gpu/drm/qxl/qxl_object.c
index 82c3bf195ad6..6e26d70f2f07 100644
--- a/drivers/gpu/drm/qxl/qxl_object.c
+++ b/drivers/gpu/drm/qxl/qxl_object.c
@@ -162,6 +162,8 @@ int qxl_bo_vmap_locked(struct qxl_bo *bo, struct dma_buf_map *map)
{
int r;
+ dma_resv_assert_held(bo->tbo.base.resv);
+
if (bo->kptr) {
bo->map_count++;
goto out;
@@ -236,6 +238,8 @@ fallback:
void qxl_bo_vunmap_locked(struct qxl_bo *bo)
{
+ dma_resv_assert_held(bo->tbo.base.resv);
+
if (bo->kptr == NULL)
return;
bo->map_count--;