From: Jie Luo <clotho67@gmail.com>
Date: Tue, 24 Jun 2008 17:38:31 +0000 (-0700)
Subject: enable bus mastering on i915 at resume time
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=ea7b44c8e6baa1a4507f05ba2c0009ac21c3fe0b;p=GitHub%2FLineageOS%2Fandroid_kernel_samsung_universal7580.git

enable bus mastering on i915 at resume time

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@gmail.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/drivers/char/drm/i915_drv.c b/drivers/char/drm/i915_drv.c
index e8f3d682e3b..93aed1c38bd 100644
--- a/drivers/char/drm/i915_drv.c
+++ b/drivers/char/drm/i915_drv.c
@@ -389,6 +389,7 @@ static int i915_resume(struct drm_device *dev)
 	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);