linux-kernel - [ 17/23] drm/radeon/atom: initialize more atom interpretor elements to 0

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Date:	Fri,  2 Aug 2013 18:23:30 +0800
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Alex Deucher <alexander.deucher@....com>
Subject: [ 17/23] drm/radeon/atom: initialize more atom interpretor elements to 0

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

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

From: Alex Deucher <alexander.deucher@....com>

commit 42a21826dc54583cdb79cc8477732e911ac9c376 upstream.

The ProcessAuxChannel table on some rv635 boards assumes
the divmul members are initialized to 0 otherwise we get
an invalid fb offset since it has a bad mask set when
setting the fb base.  While here initialize all the
atom interpretor elements to 0.

Fixes:
https://bugzilla.kernel.org/show_bug.cgi?id=60639

Signed-off-by: Alex Deucher <alexander.deucher@....com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/gpu/drm/radeon/atom.c |    5 +++++
 1 file changed, 5 insertions(+)

--- a/drivers/gpu/drm/radeon/atom.c
+++ b/drivers/gpu/drm/radeon/atom.c
@@ -1220,12 +1220,17 @@ int atom_execute_table(struct atom_conte
 	int r;
 
 	mutex_lock(&ctx->mutex);
+	/* reset data block */
+	ctx->data_block = 0;
 	/* reset reg block */
 	ctx->reg_block = 0;
 	/* reset fb window */
 	ctx->fb_base = 0;
 	/* reset io mode */
 	ctx->io_mode = ATOM_IO_MM;
+	/* reset divmul */
+	ctx->divmul[0] = 0;
+	ctx->divmul[1] = 0;
 	r = atom_execute_table_locked(ctx, index, params);
 	mutex_unlock(&ctx->mutex);
 	return r;


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