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    Subject[PATCH 4.9 062/119] usb: chipidea: debug: check before accessing ci_role
    Date
    4.9-stable review patch.  If anyone has any objections, please let me know.

    ------------------

    From: Michael Thalmeier <michael.thalmeier@hale.at>

    commit 0340ff83cd4475261e7474033a381bc125b45244 upstream.

    ci_role BUGs when the role is >= CI_ROLE_END.

    Signed-off-by: Michael Thalmeier <michael.thalmeier@hale.at>
    Signed-off-by: Peter Chen <peter.chen@nxp.com>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

    ---
    drivers/usb/chipidea/debug.c | 3 ++-
    1 file changed, 2 insertions(+), 1 deletion(-)

    --- a/drivers/usb/chipidea/debug.c
    +++ b/drivers/usb/chipidea/debug.c
    @@ -294,7 +294,8 @@ static int ci_role_show(struct seq_file
    {
    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;
    }

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