Patch "drm/radeon: fix HDP flushing" has been added to the 4.1-stable tree

Patch "drm/radeon: fix HDP flushing" has been added to the 4.1-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    drm/radeon: fix HDP flushing

to the 4.1-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     drm-radeon-fix-hdp-flushing.patch
and it can be found in the queue-4.1 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 54e03986133468e02cb01b76215e4d53a9cf6380 Mon Sep 17 00:00:00 2001
From: Grigori Goronzy <greg@chown.ath.cx>
Date: Fri, 3 Jul 2015 01:54:11 +0200
Subject: drm/radeon: fix HDP flushing
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

From: Grigori Goronzy <greg@chown.ath.cx>

commit 54e03986133468e02cb01b76215e4d53a9cf6380 upstream.

This was regressed by commit 39e7f6f8, although I don't know of any
actual issues caused by it.

The storage domain is read without TTM locking now, but the lock
never helped to prevent any races.

Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Grigori Goronzy <greg@chown.ath.cx>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/gpu/drm/radeon/radeon_gem.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/gpu/drm/radeon/radeon_gem.c
+++ b/drivers/gpu/drm/radeon/radeon_gem.c
@@ -471,6 +471,7 @@ int radeon_gem_wait_idle_ioctl(struct dr
 		r = ret;
 
 	/* Flush HDP cache via MMIO if necessary */
+	cur_placement = ACCESS_ONCE(robj->tbo.mem.mem_type);
 	if (rdev->asic->mmio_hdp_flush &&
 	    radeon_mem_type_to_domain(cur_placement) == RADEON_GEM_DOMAIN_VRAM)
 		robj->rdev->asic->mmio_hdp_flush(rdev);


Patches currently in stable-queue which might be from greg@chown.ath.cx are

queue-4.1/drm-radeon-fix-hdp-flushing.patch
queue-4.1/drm-radeon-clean-up-reference-counting-and-pinning-of-the-cursor-bos.patch
queue-4.1/drm-radeon-unpin-cursor-bos-on-suspend-and-pin-them-again-on-resume-v2.patch