From dfd1f501baad13e70a9eabcfbf8f72773da4caf6 Mon Sep 17 00:00:00 2001 From: Danny Kukawka Date: Tue, 24 Jan 2012 16:44:42 +0100 Subject: [PATCH] OMAPDSS: VENC: fix NULL pointer dereference in DSS2 VENC sysfs debug attr on OMAP4 commit cc1d3e032df53d83d0ca4d537d8eb67eb5b3e808 upstream. Commit ba02fa37de80bea10d706f39f076dd848348320a disabled the venc driver registration on OMAP4. Since the driver never gets probed/initialised your get a dereferenceed NULL pointer if you try to get info from /sys/kernel/debug/omapdss/venc Return info message about disabled venc if venc_dump_regs() gets called. Signed-off-by: Danny Kukawka Signed-off-by: Tomi Valkeinen Signed-off-by: Greg Kroah-Hartman --- drivers/video/omap2/dss/venc.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/video/omap2/dss/venc.c b/drivers/video/omap2/dss/venc.c index 5c3d0f901510..928475b173c6 100644 --- a/drivers/video/omap2/dss/venc.c +++ b/drivers/video/omap2/dss/venc.c @@ -699,6 +699,11 @@ void venc_dump_regs(struct seq_file *s) { #define DUMPREG(r) seq_printf(s, "%-35s %08x\n", #r, venc_read_reg(r)) + if (cpu_is_omap44xx()) { + seq_printf(s, "VENC currently disabled on OMAP44xx\n"); + return; + } + if (venc_runtime_get()) return; -- 2.39.5