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staging: drm/omap: Validate debugfs device 

Added check for valid device information before dumping debugfs
information.

Signed-off-by: Andy Gross <andy.gross@ti.com>
Signed-off-by: Rob Clark <rob@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Andy Gross 2012-03-05 10:48:38 -06:00 committed by Greg Kroah-Hartman
parent 132390c79e
commit 02646fb8b3
1 changed files with 10 additions and 2 deletions
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12
drivers/staging/omapdrm/omap_dmm_tiler.c
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@ -766,10 +766,18 @@ int tiler_map_show(struct seq_file *s, void *arg)
const char *a2d = special;
const char *m2dp = m2d, *a2dp = a2d;
char nice[128];
int h_adj = omap_dmm->lut_height / ydiv;
int w_adj = omap_dmm->lut_width / xdiv;
int h_adj;
int w_adj;
unsigned long flags;
if (!omap_dmm) {
/* early return if dmm/tiler device is not initialized */
return 0;
}
h_adj = omap_dmm->lut_height / ydiv;
w_adj = omap_dmm->lut_width / xdiv;
map = kzalloc(h_adj * sizeof(*map), GFP_KERNEL);
global_map = kzalloc((w_adj + 1) * h_adj, GFP_KERNEL);