From 0340ff83cd4475261e7474033a381bc125b45244 Mon Sep 17 00:00:00 2001 From: Michael Thalmeier Date: Thu, 18 May 2017 16:14:14 +0200 Subject: [PATCH] usb: chipidea: debug: check before accessing ci_role ci_role BUGs when the role is >= CI_ROLE_END. Cc: stable@vger.kernel.org #v3.10+ Signed-off-by: Michael Thalmeier Signed-off-by: Peter Chen --- drivers/usb/chipidea/debug.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/usb/chipidea/debug.c b/drivers/usb/chipidea/debug.c index 6d23eede4d8c..1c31e8a08810 100644 --- a/drivers/usb/chipidea/debug.c +++ b/drivers/usb/chipidea/debug.c @@ -294,7 +294,8 @@ static int ci_role_show(struct seq_file *s, void *data) { struct ci_hdrc *ci = s->private; - seq_printf(s, "%s\n", ci_role(ci)->name); + if (ci->role != CI_ROLE_END) + seq_printf(s, "%s\n", ci_role(ci)->name); return 0; }