Staging: speakup: don't die if accessing sysfs without synth

Setting a 'silent' parameter without a synth would crash the kernel. Signed-off-by: Sasha Levin <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
marineam · May 28, 2014 · 8b9c012 · 8b9c012
1 parent 6371f21
commit 8b9c012
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/drivers/staging/speakup/synth.c b/drivers/staging/speakup/synth.c
@@ -212,6 +212,9 @@ void synth_start(void)
 
 void spk_do_flush(void)
 {
+	if (!synth)
+		return;
+
 	speakup_info.flushing = 1;
 	synth_buffer_clear();
 	if (synth->alive) {