From: =?utf-8?q?Michel_D=C3=A4nzer?= <michel@tungstengraphics.com>
Date: Tue, 24 Oct 2006 14:10:59 +0000 (+1000)
Subject: drm: i915: Only return EBUSY after we've established we need to schedule a new swap.
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=21fa60ed4eab5b3b28d05930bb086615ecc191b1;p=deliverable%2Flinux.git

drm: i915: Only return EBUSY after we've established we need to schedule a new swap.

Signed-off-by: Dave Airlie <airlied@linux.ie>
---

diff --git a/drivers/char/drm/i915_irq.c b/drivers/char/drm/i915_irq.c
index df28bc1e84c6..40c55edfa2ee 100644
--- a/drivers/char/drm/i915_irq.c
+++ b/drivers/char/drm/i915_irq.c
@@ -392,11 +392,6 @@ int i915_vblank_swap(DRM_IOCTL_ARGS)
 		return DRM_ERR(EINVAL);
 	}
 
-	if (dev_priv->swaps_pending >= 100) {
-		DRM_DEBUG("Too many swaps queued\n");
-		return DRM_ERR(EBUSY);
-	}
-
 	DRM_COPY_FROM_USER_IOCTL(swap, (drm_i915_vblank_swap_t __user *) data,
 				 sizeof(swap));
 
@@ -461,6 +456,11 @@ int i915_vblank_swap(DRM_IOCTL_ARGS)
 
 	spin_unlock_irqrestore(&dev_priv->swaps_lock, irqflags);
 
+	if (dev_priv->swaps_pending >= 100) {
+		DRM_DEBUG("Too many swaps queued\n");
+		return DRM_ERR(EBUSY);
+	}
+
 	vbl_swap = drm_calloc(1, sizeof(vbl_swap), DRM_MEM_DRIVER);
 
 	if (!vbl_swap) {