diff options
| author | Simon Ser <contact@emersion.fr> | 2023-10-20 13:19:38 +0300 |
|---|---|---|
| committer | Simon Ser <contact@emersion.fr> | 2023-10-27 14:47:37 +0300 |
| commit | 0226ba393eb1a90d63955cc407340c5d506ecacf (patch) | |
| tree | 0ff0ed99830d79fd68e5fcde3270aedf4b9505df /drivers/gpu/drm/drm_framebuffer.c | |
| parent | 80683bf48afcdbebbaf51057e71b2701aa07826d (diff) | |
| download | linux-0226ba393eb1a90d63955cc407340c5d506ecacf.tar.xz | |
drm: extract closefb logic in separate function
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@emersion.fr>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Dennis Filder <d.filder@web.de>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: Pekka Paalanen <ppaalanen@gmail.com>
Cc: Rob Clark <robdclark@gmail.com>
Cc: Sean Paul <seanpaul@chromium.org>
Reviewed-by: Daniel Stone <daniels@collabora.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231020101926.145327-1-contact@emersion.fr
Diffstat (limited to 'drivers/gpu/drm/drm_framebuffer.c')
| -rw-r--r-- | drivers/gpu/drm/drm_framebuffer.c | 53 |
1 files changed, 31 insertions, 22 deletions
diff --git a/drivers/gpu/drm/drm_framebuffer.c b/drivers/gpu/drm/drm_framebuffer.c index d3ba0698b84b..ef3f1e4bc334 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; + 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 @@ -410,9 +435,8 @@ static void drm_mode_rmfb_work_fn(struct work_struct *w) 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; + struct drm_framebuffer *fb; + int ret; if (!drm_core_check_feature(dev, DRIVER_MODESET)) return -EOPNOTSUPP; @@ -421,24 +445,13 @@ 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 - * * drm_framebuffer_remove may fail with -EINTR on pending signals, * so run this in a separate stack as there's no way to correctly * handle this after the fb is already removed from the lookup table. @@ -457,10 +470,6 @@ 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, |