[3.16.y-ckt stable] Patch "drm/radeon: do a posting read in r600_set_irq" has been added to staging queue

Luis Henriques luis.henriques at canonical.com
Thu Mar 19 10:13:11 UTC 2015

This is a note to let you know that I have just added a patch titled

    drm/radeon: do a posting read in r600_set_irq

to the linux-3.16.y-queue branch of the 3.16.y-ckt extended stable tree 
which can be found at:


This patch is scheduled to be released in version 3.16.7-ckt9.

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.16.y-ckt tree, see



>From d76ffb4cb335d86ef059a4d2c9f98c24a2a8e751 Mon Sep 17 00:00:00 2001
From: Alex Deucher <alexander.deucher at amd.com>
Date: Mon, 2 Mar 2015 20:41:31 -0500
Subject: drm/radeon: do a posting read in r600_set_irq

commit 9d1393f23d5656cdd5f368efd60694d4aeed81d3 upstream.

To make sure the writes go through the pci bridge.


Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
Signed-off-by: Luis Henriques <luis.henriques at canonical.com>
 drivers/gpu/drm/radeon/r600.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/radeon/r600.c b/drivers/gpu/drm/radeon/r600.c
index 44b046b4056f..5e31413fb454 100644
--- a/drivers/gpu/drm/radeon/r600.c
+++ b/drivers/gpu/drm/radeon/r600.c
@@ -3637,6 +3637,9 @@ int r600_irq_set(struct radeon_device *rdev)
 		WREG32(RV770_CG_THERMAL_INT, thermal_int);

+	/* posting read */
 	return 0;

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