[PATCH v2 3/7] drm/udl: Vmap framebuffer after all tests succeeded in damage handling

[Thomas Zimmermann]

We now do the fast tests before the potentially expensive vmap operation.

Signed-off-by: Thomas Zimmermann <tzimmermann at suse.de>
Reviewed-by: Emil Velikov <emil.velikov at collabora.com>
Acked-by: Gerd Hoffmann <kraxel at redhat.com>
---
 drivers/gpu/drm/udl/udl_fb.c       | 19 +++++++------------
 drivers/gpu/drm/udl/udl_transfer.c |  1 -
 2 files changed, 7 insertions(+), 13 deletions(-)

diff --git a/drivers/gpu/drm/udl/udl_fb.c b/drivers/gpu/drm/udl/udl_fb.c
index ed6d9476b25b..dd7ba7f63214 100644
--- a/drivers/gpu/drm/udl/udl_fb.c
+++ b/drivers/gpu/drm/udl/udl_fb.c
@@ -85,12 +85,6 @@ int udl_handle_damage(struct drm_framebuffer *fb, int x, int y,
 	}
 	spin_unlock(&udl->active_fb_16_lock);
 
-	vaddr = drm_gem_shmem_vmap(fb->obj[0]);
-	if (IS_ERR(vaddr)) {
-		DRM_ERROR("failed to vmap fb\n");
-		return 0;
-	}
-
 	aligned_x = DL_ALIGN_DOWN(x, sizeof(unsigned long));
 	width = DL_ALIGN_UP(width + (x-aligned_x), sizeof(unsigned long));
 	x = aligned_x;
@@ -98,8 +92,13 @@ int udl_handle_damage(struct drm_framebuffer *fb, int x, int y,
 	if ((width <= 0) ||
 	    (x + width > fb->width) ||
 	    (y + height > fb->height)) {
-		ret = -EINVAL;
-		goto err_drm_gem_shmem_vunmap;
+		return -EINVAL;
+	}
+
+	vaddr = drm_gem_shmem_vmap(fb->obj[0]);
+	if (IS_ERR(vaddr)) {
+		DRM_ERROR("failed to vmap fb\n");
+		return 0;
 	}
 
 	urb = udl_get_urb(dev);
@@ -131,10 +130,6 @@ int udl_handle_damage(struct drm_framebuffer *fb, int x, int y,
 	drm_gem_shmem_vunmap(fb->obj[0], vaddr);
 
 	return 0;
-
-err_drm_gem_shmem_vunmap:
-	drm_gem_shmem_vunmap(fb->obj[0], vaddr);
-	return ret;
 }
 
 static int udl_user_framebuffer_dirty(struct drm_framebuffer *fb,
diff --git a/drivers/gpu/drm/udl/udl_transfer.c b/drivers/gpu/drm/udl/udl_transfer.c
index 686358d1f669..5fae48723286 100644
--- a/drivers/gpu/drm/udl/udl_transfer.c
+++ b/drivers/gpu/drm/udl/udl_transfer.c
@@ -249,4 +249,3 @@ int udl_render_hline(struct drm_device *dev, int log_bpp, struct urb **urb_ptr,
 
 	return 0;
 }
-
-- 
2.23.0