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i915: Don't dereference HWS in /proc debug files when it isn't initialized. 

Signed-off-by: Eric Anholt <eric@anholt.net>
Acked-by: Keith Packard <keithp@keithp.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Eric Anholt 2008-10-17 14:41:03 -07:00 committed by Dave Airlie
parent 053d7f244a
commit a2d44cca4f
1 changed files with 12 additions and 3 deletions
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15
drivers/gpu/drm/i915/i915_gem_proc.c
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@ -192,7 +192,12 @@ static int i915_gem_seqno_info(char *buf, char **start, off_t offset,
*start = &buf[offset];
*eof = 0;
DRM_PROC_PRINT("Current sequence: %d\n", i915_get_gem_seqno(dev));
if (dev_priv->hw_status_page != NULL) {
DRM_PROC_PRINT("Current sequence: %d\n",
i915_get_gem_seqno(dev));
} else {
DRM_PROC_PRINT("Current sequence: hws uninitialized\n");
}
DRM_PROC_PRINT("Waiter sequence: %d\n",
dev_priv->mm.waiting_gem_seqno);
DRM_PROC_PRINT("IRQ sequence: %d\n", dev_priv->mm.irq_gem_seqno);
@ -230,8 +235,12 @@ static int i915_interrupt_info(char *buf, char **start, off_t offset,
I915_READ(PIPEBSTAT));
DRM_PROC_PRINT("Interrupts received: %d\n",
atomic_read(&dev_priv->irq_received));
DRM_PROC_PRINT("Current sequence: %d\n",
i915_get_gem_seqno(dev));
if (dev_priv->hw_status_page != NULL) {
DRM_PROC_PRINT("Current sequence: %d\n",
i915_get_gem_seqno(dev));
} else {
DRM_PROC_PRINT("Current sequence: hws uninitialized\n");
}
DRM_PROC_PRINT("Waiter sequence: %d\n",
dev_priv->mm.waiting_gem_seqno);
DRM_PROC_PRINT("IRQ sequence: %d\n",