Messages in this thread | | | Date | Tue, 26 May 2015 20:02:12 -0700 | From | Greg KH <> | Subject | Re: [PATCH V2 3/3] n_gsm: wake up ldisc tty before using it |
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On Wed, May 27, 2015 at 10:50:01AM +0800, Zhang, Yanmin wrote: > Wake up ldisc device before calling its driver to access the device. > > Signed-off-by: Zhang Yanmin <yanmin.zhang@intel.com> > > --- > > drivers/tty/n_gsm.c | 40 +++++++++++++++++++++++++++++++++++++++- > 1 file changed, 39 insertions(+), 1 deletion(-) > > diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c > index 2c34c32..40671fa 100644 > --- a/drivers/tty/n_gsm.c > +++ b/drivers/tty/n_gsm.c > @@ -62,6 +62,7 @@ > #include <linux/netdevice.h> > #include <linux/etherdevice.h> > #include <linux/gsmmux.h> > +#include <linux/pm_runtime.h> > > static int debug; > module_param(debug, int, 0600); > @@ -555,6 +556,27 @@ static int gsm_stuff_frame(const u8 *input, u8 *output, int len) > return olen; > } > > +static int pm_runtime_get_sync_tty(struct tty_struct *tty) > +{ > + int ret = 0; > + > + /*Wakeup parent as tty itself doesn't enable runtime*/
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greg k-h
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