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drm/nouveau/fbcon: fix oops without fbdev emulation

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[ Upstream commit 4813766325 ]

This is similar to an earlier commit 52dfcc5ccf ("drm/nouveau: fix for
disabled fbdev emulation"), but protects all occurrences of helper.fbdev
in the source.

I see oops in nouveau_fbcon_accel_save_disable() called from
nouveau_fbcon_set_suspend_work() on Linux 3.13 when
CONFIG_DRM_FBDEV_EMULATION option is disabled.

Signed-off-by: Pavel Roskin <plroskin@gmail.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Pavel Roskin
2017-09-23 13:10:33 -07:00
committed by Greg Kroah-Hartman
parent e25dc63aa3
commit 4a3948cb6d
1 changed files with 4 additions and 3 deletions
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7
drivers/gpu/drm/nouveau/nouveau_fbcon.c
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@@ -235,7 +235,7 @@ void
nouveau_fbcon_accel_save_disable(struct drm_device *dev)
{
struct nouveau_drm *drm = nouveau_drm(dev);
if (drm->fbcon) {
if (drm->fbcon && drm->fbcon->helper.fbdev) {
drm->fbcon->saved_flags = drm->fbcon->helper.fbdev->flags;
drm->fbcon->helper.fbdev->flags |= FBINFO_HWACCEL_DISABLED;
}
@@ -245,7 +245,7 @@ void
nouveau_fbcon_accel_restore(struct drm_device *dev)
{
struct nouveau_drm *drm = nouveau_drm(dev);
if (drm->fbcon) {
if (drm->fbcon && drm->fbcon->helper.fbdev) {
drm->fbcon->helper.fbdev->flags = drm->fbcon->saved_flags;
}
}
@@ -257,7 +257,8 @@ nouveau_fbcon_accel_fini(struct drm_device *dev)
struct nouveau_fbdev *fbcon = drm->fbcon;
if (fbcon && drm->channel) {
console_lock();
fbcon->helper.fbdev->flags |= FBINFO_HWACCEL_DISABLED;
if (fbcon->helper.fbdev)
fbcon->helper.fbdev->flags |= FBINFO_HWACCEL_DISABLED;
console_unlock();
nouveau_channel_idle(drm->channel);
nvif_object_fini(&fbcon->twod);