Since the required clock to access registers is gated off in low power mode, add ci->in_lpm check before try to dump registers value. Signed-off-by: Li Jun <jun.li@xxxxxxxxxxxxx> --- drivers/usb/chipidea/debug.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/usb/chipidea/debug.c b/drivers/usb/chipidea/debug.c index 268e423..dfb05ed 100644 --- a/drivers/usb/chipidea/debug.c +++ b/drivers/usb/chipidea/debug.c @@ -336,8 +336,8 @@ static int ci_registers_show(struct seq_file *s, void *unused) struct ci_hdrc *ci = s->private; u32 tmp_reg; - if (!ci) - return 0; + if (!ci || ci->in_lpm) + return -EPERM; /* ------ Registers ----- */ tmp_reg = hw_read_intr_enable(ci); -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
