lkml.org 
[lkml]   [2008]   [Nov]   [9]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 1/1] DRM: fix radeon suspend/resume oops
Date
Hi,

I've sent a bugreport twice with no reply, so coming with a patch.
Andrew please apply, if no comments or a better patch from drm
fellows comes.

As the accesses to the mmio member are not protected by anything, they
seem to be racy with the open/clsoe anyways, setting this down there
too.

--
When the driver is bound to a device and nobody opens the device node,
it will oops on suspend and resume, since it's not mapped and
dev_priv->mmio is NULL.

Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Cc: David Airlie <airlied@linux.ie>
---
drivers/gpu/drm/radeon/radeon_drv.c | 7 +++++++
1 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/drivers/gpu/drm/radeon/radeon_drv.c b/drivers/gpu/drm/radeon/radeon_drv.c
index 71af746..2e74a98 100644
--- a/drivers/gpu/drm/radeon/radeon_drv.c
+++ b/drivers/gpu/drm/radeon/radeon_drv.c
@@ -52,10 +52,14 @@ static int dri_library_name(struct drm_device *dev, char *buf)
"r300"));
}

+/* FIXME all this suspend/resume races with open/close? */
static int radeon_suspend(struct drm_device *dev, pm_message_t state)
{
drm_radeon_private_t *dev_priv = dev->dev_private;

+ if (!dev_priv->mmio)
+ return 0;
+
/* Disable *all* interrupts */
if ((dev_priv->flags & RADEON_FAMILY_MASK) >= CHIP_RS690)
RADEON_WRITE(R500_DxMODE_INT_MASK, 0);
@@ -67,6 +71,9 @@ static int radeon_resume(struct drm_device *dev)
{
drm_radeon_private_t *dev_priv = dev->dev_private;

+ if (!dev_priv->mmio)
+ return 0;
+
/* Restore interrupt registers */
if ((dev_priv->flags & RADEON_FAMILY_MASK) >= CHIP_RS690)
RADEON_WRITE(R500_DxMODE_INT_MASK, dev_priv->r500_disp_irq_reg);
--
1.6.0.3


\
 
 \ /
  Last update: 2008-11-09 22:59    [W:0.034 / U:0.168 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site