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usb: chipidea: debug: check before accessing ci_role

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commit 0340ff83cd4475261e7474033a381bc125b45244 upstream.

ci_role BUGs when the role is >= CI_ROLE_END.

Cc: stable@vger.kernel.org  #v3.10+
Signed-off-by: Michael Thalmeier <michael.thalmeier@hale.at>
Signed-off-by: Peter Chen <peter.chen@nxp.com>
Signed-off-by: Willy Tarreau <w@1wt.eu>
This commit is contained in:
Michael Thalmeier
2017-05-18 16:14:14 +02:00
committed by Willy Tarreau
parent f862c94364
commit 54fd65c076
1 changed files with 2 additions and 1 deletions
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drivers/usb/chipidea/debug.c
+2 -1
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@@ -203,7 +203,8 @@ static int ci_role_show(struct seq_file *s, void *data)
{
struct ci13xxx *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;
}