i915_do_wait_request BUG: unable to handle kernel NULL pointer dereference at (null)
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From: Jesse Barnes on 23 Apr 2010 12:10 On Fri, 23 Apr 2010 12:24:25 +0200 Zdenek Kabelac <zdenek.kabelac(a)gmail.com> wrote: > Hi > > Just tried to boot current vanilla upstream kernel - and got pretty ugly oops. > Here is serial console catch after X-startup: > > > BUG: unable to handle kernel NULL pointer dereference at (null) > IP: [<ffffffffa035de81>] i915_do_wait_request+0x101/0x4f0 [i915] > PGD 139649067 PUD 133b5a067 PMD 0 > Oops: 0000 [#1] PREEMPT SMP > last sysfs file: /sys/devices/virtual/backlight/acpi_video0/actual_brightness > CPU 0 > Modules linked in: xt_tcpudp bridge stp llc autofs4 sunrpc ipv6 > ipt_REJECT xt_physdev xt_state ] > Here's the fix I'm testing now. -- Jesse Barnes, Intel Open Source Technology Center diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index 7f52cc1..ef3d91d 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -1793,7 +1793,7 @@ i915_get_gem_seqno(struct drm_device *dev) { drm_i915_private_t *dev_priv = dev->dev_private; - if (IS_I965G(dev)) + if (HAS_PIPE_CONTROL(dev)) return ((volatile u32 *)(dev_priv->seqno_page))[0]; else return READ_HWSP(dev_priv, I915_GEM_HWS_INDEX); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ |