drm_mode_rmfb performs two operations: drop the FB from the
file_priv->fbs list, and make sure the FB is no longer used on a
plane.
In the next commit an IOCTL which only does so former will be
introduced, so let's split it into a separate function.
No functional change, only refactoring.
v2: no change
Signed-off-by: Simon Ser <contact@xxxxxxxxxxx>
Cc: Hans de Goede <hdegoede@xxxxxxxxxx>
Cc: Dennis Filder <d.filder@xxxxxx>
Cc: Daniel Vetter <daniel@xxxxxxxx>
Cc: Pekka Paalanen <ppaalanen@xxxxxxxxx>
Cc: Rob Clark <robdclark@xxxxxxxxx>
Cc: Sean Paul <seanpaul@xxxxxxxxxxxx>
Cc: Daniel Stone <daniels@xxxxxxxxxxxxx>
---
drivers/gpu/drm/drm_framebuffer.c | 51 +++++++++++++++++++------------
1 file changed, 31 insertions(+), 20 deletions(-)
diff --git a/drivers/gpu/drm/drm_framebuffer.c b/drivers/gpu/drm/drm_framebuffer.c
index d3ba0698b84b..62306196808c 100644
--- a/drivers/gpu/drm/drm_framebuffer.c
+++ b/drivers/gpu/drm/drm_framebuffer.c
@@ -394,6 +394,31 @@ static void drm_mode_rmfb_work_fn(struct work_struct *w)
}
}
+static int drm_mode_closefb(struct drm_framebuffer *fb,
+ struct drm_file *file_priv)
+{
+ struct drm_framebuffer *fbl = NULL;
+ bool found = false;
+
+ mutex_lock(&file_priv->fbs_lock);
+ list_for_each_entry(fbl, &file_priv->fbs, filp_head)
+ if (fb == fbl)
+ found = true;
+
+ if (!found) {
+ mutex_unlock(&file_priv->fbs_lock);
+ return -ENOENT;
+ }
+
+ list_del_init(&fb->filp_head);
+ mutex_unlock(&file_priv->fbs_lock);
+
+ /* Drop the reference that was stored in the fbs list */
+ drm_framebuffer_put(fb);
+
+ return 0;
+}
+
/**
* drm_mode_rmfb - remove an FB from the configuration
* @dev: drm device
@@ -411,8 +436,7 @@ int drm_mode_rmfb(struct drm_device *dev, u32 fb_id,
struct drm_file *file_priv)
{
struct drm_framebuffer *fb = NULL;
- struct drm_framebuffer *fbl = NULL;
- int found = 0;
+ int ret;
if (!drm_core_check_feature(dev, DRIVER_MODESET))
return -EOPNOTSUPP;
@@ -421,23 +445,14 @@ int drm_mode_rmfb(struct drm_device *dev, u32 fb_id,
if (!fb)
return -ENOENT;
- mutex_lock(&file_priv->fbs_lock);
- list_for_each_entry(fbl, &file_priv->fbs, filp_head)
- if (fb == fbl)
- found = 1;
- if (!found) {
- mutex_unlock(&file_priv->fbs_lock);
- goto fail_unref;
+ ret = drm_mode_closefb(fb, file_priv);
+ if (ret != 0) {
+ drm_framebuffer_put(fb);
+ return ret;
}
- list_del_init(&fb->filp_head);
- mutex_unlock(&file_priv->fbs_lock);
-
- /* drop the reference we picked up in framebuffer lookup */
- drm_framebuffer_put(fb);
-
/*
- * we now own the reference that was stored in the fbs list
+ * We now own the reference we picked up in drm_framebuffer_lookup.
*
* drm_framebuffer_remove may fail with -EINTR on pending signals,
* so run this in a separate stack as there's no way to correctly
@@ -457,10 +472,6 @@ int drm_mode_rmfb(struct drm_device *dev, u32 fb_id,
drm_framebuffer_put(fb);
return 0;
-
-fail_unref:
- drm_framebuffer_put(fb);
- return -ENOENT;
}
int drm_mode_rmfb_ioctl(struct drm_device *dev,
--
2.42.0
