redonkable/alistair23-linux
redonkable/alistair23-linux
1
0
Fork 0
Code Releases Activity

vc4: Fix bo refcounts during async commits (Boris)

Browse source 
vga-dac: Fix edid memory leak (Sean)
 
 Cc: Boris Brezillon <boris.brezillon@bootlin.com>
 Cc: Sean Paul <seanpaul@chromium.org>
 -----BEGIN PGP SIGNATURE-----
 
 iQEzBAABCgAdFiEEfxcpfMSgdnQMs+QqlvcN/ahKBwoFAlrqFqcACgkQlvcN/ahK
 BwraMwf+PppfIRNcyvUU3iPu6WiaodD9qOdt55AU6WK8SmEJ0Bk+10XNFjYHXOrA
 b/zUo6g7Zru+sneLKhZGwpGkBQ1IcuwichpQGd+OvknT2U8Ee8IwEZib7g9Vpqoi
 np4PWKMRI1/XWlCOHvkY6fAV7uVDWjkRKDmeUmpTRaWBQdq/QVAzk1z0hUW93mSY
 RqZZTNZBXPsuwW+wIdAIDlm5PSvYBbgEa2HVj44iK4PB7SlI5jGMtjbQpcbmmT20
 V4RvvLPeRBCizA5LiSu+HspRCvtBZfSHt5nRqONc11bmK0DjiZt8tBSsbHEUHEt6
 ySDjbjk2RVwVAE5wV3Z7xKT1CQOBZg==
 =yyCu
 -----END PGP SIGNATURE-----

Merge tag 'drm-misc-fixes-2018-05-02' of git://anongit.freedesktop.org/drm/drm-misc into drm-fixes

vc4: Fix bo refcounts during async commits (Boris)
vga-dac: Fix edid memory leak (Sean)

Cc: Boris Brezillon <boris.brezillon@bootlin.com>
Cc: Sean Paul <seanpaul@chromium.org>

* tag 'drm-misc-fixes-2018-05-02' of git://anongit.freedesktop.org/drm/drm-misc:
  drm/bridge: vga-dac: Fix edid memory leak
  drm/vc4: Make sure vc4_bo_{inc,dec}_usecnt() calls are balanced
This commit is contained in:
Dave Airlie 2018-05-03 11:58:39 +10:00
parent 083faae152 49ceda9de2
commit 1e5fbc0b8d
2 changed files with 48 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

4
drivers/gpu/drm/bridge/dumb-vga-dac.c
View file

@ -56,7 +56,9 @@ static int dumb_vga_get_modes(struct drm_connector *connector)
}
drm_mode_connector_update_edid_property(connector, edid);
return drm_add_edid_modes(connector, edid);
ret = drm_add_edid_modes(connector, edid);
kfree(edid);
return ret;
fallback:
/*

46
drivers/gpu/drm/vc4/vc4_crtc.c
View file

@ -760,6 +760,7 @@ static irqreturn_t vc4_crtc_irq_handler(int irq, void *data)
struct vc4_async_flip_state {
struct drm_crtc *crtc;
struct drm_framebuffer *fb;
struct drm_framebuffer *old_fb;
struct drm_pending_vblank_event *event;
struct vc4_seqno_cb cb;
@ -789,6 +790,23 @@ vc4_async_page_flip_complete(struct vc4_seqno_cb *cb)
drm_crtc_vblank_put(crtc);
drm_framebuffer_put(flip_state->fb);
/* Decrement the BO usecnt in order to keep the inc/dec calls balanced
* when the planes are updated through the async update path.
* FIXME: we should move to generic async-page-flip when it's
* available, so that we can get rid of this hand-made cleanup_fb()
* logic.
*/
if (flip_state->old_fb) {
struct drm_gem_cma_object *cma_bo;
struct vc4_bo *bo;
cma_bo = drm_fb_cma_get_gem_obj(flip_state->old_fb, 0);
bo = to_vc4_bo(&cma_bo->base);
vc4_bo_dec_usecnt(bo);
drm_framebuffer_put(flip_state->old_fb);
}
kfree(flip_state);
up(&vc4->async_modeset);
@ -813,9 +831,22 @@ static int vc4_async_page_flip(struct drm_crtc *crtc,
struct drm_gem_cma_object *cma_bo = drm_fb_cma_get_gem_obj(fb, 0);
struct vc4_bo *bo = to_vc4_bo(&cma_bo->base);
/* Increment the BO usecnt here, so that we never end up with an
* unbalanced number of vc4_bo_{dec,inc}_usecnt() calls when the
* plane is later updated through the non-async path.
* FIXME: we should move to generic async-page-flip when it's
* available, so that we can get rid of this hand-made prepare_fb()
* logic.
*/
ret = vc4_bo_inc_usecnt(bo);
if (ret)
return ret;
flip_state = kzalloc(sizeof(*flip_state), GFP_KERNEL);
if (!flip_state)
if (!flip_state) {
vc4_bo_dec_usecnt(bo);
return -ENOMEM;
}
drm_framebuffer_get(fb);
flip_state->fb = fb;
@ -826,10 +857,23 @@ static int vc4_async_page_flip(struct drm_crtc *crtc,
ret = down_interruptible(&vc4->async_modeset);
if (ret) {
drm_framebuffer_put(fb);
vc4_bo_dec_usecnt(bo);
kfree(flip_state);
return ret;
}
/* Save the current FB before it's replaced by the new one in
* drm_atomic_set_fb_for_plane(). We'll need the old FB in
* vc4_async_page_flip_complete() to decrement the BO usecnt and keep
* it consistent.
* FIXME: we should move to generic async-page-flip when it's
* available, so that we can get rid of this hand-made cleanup_fb()
* logic.
*/
flip_state->old_fb = plane->state->fb;
if (flip_state->old_fb)
drm_framebuffer_get(flip_state->old_fb);
WARN_ON(drm_crtc_vblank_get(crtc) != 0);
/* Immediately update the plane's legacy fb pointer, so that later