linux-kernel - [ 27/95] drm/nvd0/disp: mask off high 16 bit of negative cursor x-coordinate

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Date:	Sun, 09 Sep 2012 23:42:17 +0100
From:	Ben Hutchings <ben@...adent.org.uk>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	alan@...rguk.ukuu.org.uk,
	Christoph Bumiller <e0425955@...dent.tuwien.ac.at>,
	Ben Skeggs <bskeggs@...hat.com>
Subject: [ 27/95] drm/nvd0/disp: mask off high 16 bit of negative cursor x-coordinate

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

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

From: Christoph Bumiller <e0425955@...dent.tuwien.ac.at>

commit af5e7d84b0ec45b2b614b0d6e3657cbdceaa21f9 upstream.

Signed-off-by: Christoph Bumiller <e0425955@...dent.tuwien.ac.at>
Signed-off-by: Ben Skeggs <bskeggs@...hat.com>
[bwh: Backported to 3.2: register value is in the local 'data' variable]
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 drivers/gpu/drm/nouveau/nvd0_display.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/gpu/drm/nouveau/nvd0_display.c
+++ b/drivers/gpu/drm/nouveau/nvd0_display.c
@@ -472,7 +472,7 @@ static int
 nvd0_crtc_cursor_move(struct drm_crtc *crtc, int x, int y)
 {
 	struct nouveau_crtc *nv_crtc = nouveau_crtc(crtc);
-	const u32 data = (y << 16) | x;
+	const u32 data = (y << 16) | (x & 0xffff);
 
 	nv_wr32(crtc->dev, 0x64d084 + (nv_crtc->index * 0x1000), data);
 	nv_wr32(crtc->dev, 0x64d080 + (nv_crtc->index * 0x1000), 0x00000000);


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