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drm/nouveau/kms: Avoid a hang entering KDB with VT accel on.

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Francisco Jerez advises that pre-nv20 cards would hang if we entered
kdb with accel on and IRQs disabled, so we now disable accel before
entering kdb and re-enable it on the way back out.

Reported-by: Francisco Jerez <currojerez@riseup.net>
Signed-off-by: Chris Ball <cjb@laptop.org>
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Chris Ball 2010-09-26 06:47:27 -05:00 committed by Dave Airlie
parent ff773714dd
commit a424d761a0
1 changed files with 9 additions and 0 deletions
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9
drivers/gpu/drm/nouveau/nv04_crtc.c
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@ -33,6 +33,7 @@
#include "nouveau_fb.h"
#include "nouveau_hw.h"
#include "nvreg.h"
#include "nouveau_fbcon.h"
static int
nv04_crtc_mode_set_base(struct drm_crtc *crtc, int x, int y,
@ -860,6 +861,14 @@ nv04_crtc_mode_set_base_atomic(struct drm_crtc *crtc,
struct drm_framebuffer *fb,
int x, int y, int enter)
{
struct drm_nouveau_private *dev_priv = crtc->dev->dev_private;
struct drm_device *dev = dev_priv->dev;
if (enter)
nouveau_fbcon_save_disable_accel(dev);
else
nouveau_fbcon_restore_accel(dev);
return nv04_crtc_do_mode_set_base(crtc, fb, x, y, true);
}