linux-kernel - [PATCH] enable bus mastering on i915 at resume time

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Message-Id: <200806241038.32123.jbarnes@virtuousgeek.org>
Date:	Tue, 24 Jun 2008 10:38:31 -0700
From:	Jesse Barnes <jbarnes@...tuousgeek.org>
To:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Dave Airlie <airlied@...ux.ie>
Cc:	linux-kernel@...r.kernel.org
Subject: [PATCH] enable bus mastering on i915 at resume time

From: Jie Luo <clotho67@...il.com>

On 9xx chips, bus mastering needs to be enabled at resume time for much of the 
chip to function.  With this patch, vblank interrupts will work as expected 
on resume, along with other chip functions.   Fixes kernel bugzilla #10844.

Signed-off-by: Jie Luo <clotho67@...il.com>
Signed-off-by: Jesse Barnes <jbarnes@...tuousgeek.org>

--- drivers/char/drm/i915_drv.c	2008-06-20 15:35:50.000000000 +0800
+++ drivers/char/drm/i915_drv.c.new	2008-06-20 15:35:35.000000000 +0800
@@ -385,6 +385,7 @@ static int i915_resume(struct drm_device
 	pci_restore_state(dev->pdev);
 	if (pci_enable_device(dev->pdev))
 		return -1;
+	pci_set_master(dev->pdev);
 
 	pci_write_config_byte(dev->pdev, LBB, dev_priv->saveLBB);
 
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