[PATCH 08/10] staging: drm/omap: Validate debugfs device

[Rob Clark]

From: Andy Gross 

Added check for valid device information before dumping debugfs
information.

Signed-off-by: Andy Gross 
Signed-off-by: Rob Clark 
---
 drivers/staging/omapdrm/omap_dmm_tiler.c |   12 ++--
 1 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/drivers/staging/omapdrm/omap_dmm_tiler.c 
b/drivers/staging/omapdrm/omap_dmm_tiler.c
index 852d944..e4c7bb6 100644
--- a/drivers/staging/omapdrm/omap_dmm_tiler.c
+++ b/drivers/staging/omapdrm/omap_dmm_tiler.c
@@ -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);

-- 
1.7.5.4

[PATCH 08/10] staging: drm/omap: Validate debugfs device

[Rob Clark]

From: Andy Gross andy.gr...@ti.com

Added check for valid device information before dumping debugfs
information.

Signed-off-by: Andy Gross andy.gr...@ti.com
Signed-off-by: Rob Clark r...@ti.com
---
 drivers/staging/omapdrm/omap_dmm_tiler.c |   12 ++--
 1 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/drivers/staging/omapdrm/omap_dmm_tiler.c 
b/drivers/staging/omapdrm/omap_dmm_tiler.c
index 852d944..e4c7bb6 100644
--- a/drivers/staging/omapdrm/omap_dmm_tiler.c
+++ b/drivers/staging/omapdrm/omap_dmm_tiler.c
@@ -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);
 
-- 
1.7.5.4

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