linux-kernel - [ 077/122] drm/radeon: fix fence related segfault in CS

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Message-Id: <20120807221955.724250278@linuxfoundation.org>
Date:	Tue,  7 Aug 2012 15:26:05 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:	Greg KH <gregkh@...uxfoundation.org>,
	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	alan@...rguk.ukuu.org.uk,
	Christian König <deathsimple@...afone.de>,
	Jerome Glisse <jglisse@...hat.com>,
	Michel Dänzer <michel.daenzer@....com>,
	Alex Deucher <alexander.deucher@....com>
Subject: [ 077/122] drm/radeon: fix fence related segfault in CS

From: Greg KH <gregkh@...uxfoundation.org>

3.5-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Christian König <deathsimple@...afone.de>

commit 93bf888c5c730605e3470f5d2381f296eda88d79 upstream.

Don't return success if scheduling the IB fails, otherwise
we end up with an oops in ttm_eu_fence_buffer_objects.

Signed-off-by: Christian König <deathsimple@...afone.de>
Reviewed-by: Jerome Glisse <jglisse@...hat.com>
Reviewed-by: Michel Dänzer <michel.daenzer@....com>
Reviewed-by: Alex Deucher <alexander.deucher@....com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/gpu/drm/radeon/radeon_cs.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/gpu/drm/radeon/radeon_cs.c
+++ b/drivers/gpu/drm/radeon/radeon_cs.c
@@ -377,7 +377,7 @@ static int radeon_cs_ib_chunk(struct rad
 	if (r) {
 		DRM_ERROR("Failed to schedule IB !\n");
 	}
-	return 0;
+	return r;
 }
 
 static int radeon_bo_vm_update_pte(struct radeon_cs_parser *parser,


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