On Thu, Mar 26, 2015 at 04:19:52PM +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.li@xxxxxxxxxxxxx> > --- > drivers/usb/chipidea/debug.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/usb/chipidea/debug.c b/drivers/usb/chipidea/debug.c > index 268e423..905e4da 100644 > --- a/drivers/usb/chipidea/debug.c > +++ b/drivers/usb/chipidea/debug.c > @@ -336,7 +336,7 @@ static int ci_registers_show(struct seq_file *s, void *unused) > struct ci_hdrc *ci = s->private; > u32 tmp_reg; > > - if (!ci) > + if (!ci || ci->in_lpm) > return 0; > > /* ------ Registers ----- */ > -- > 1.9.1 > Would you show an warning message if this operation is not allowed, Eg, return -EPERM? -- Best Regards, Peter Chen -- 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
