On Fri, Mar 27, 2015 at 03:06:27PM +0800, Li Jun wrote:
> 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 | 5 +++++
> 1 file changed, 5 insertions(+)
>
> diff --git a/drivers/usb/chipidea/debug.c b/drivers/usb/chipidea/debug.c
> index 268e423..a367cee 100644
> --- a/drivers/usb/chipidea/debug.c
> +++ b/drivers/usb/chipidea/debug.c
> @@ -339,6 +339,11 @@ static int ci_registers_show(struct seq_file *s, void
> *unused)
> if (!ci)
> return 0;
>
> + if (ci->in_lpm) {
> + seq_printf(s, "Can't dump registers value in low power mode\n");
> + return 0;
> + }
> +
> /* ------ Registers ----- */
> tmp_reg = hw_read_intr_enable(ci);
> seq_printf(s, "USBINTR reg: %08x\n", tmp_reg);
> --
> 1.9.1
>
Why not just return error code, it will show warning message too.
--
Best Regards,
Peter Chen
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