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...@freescale.com>
---
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
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