linux-kernel - Re: Problem with VMAP

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Date:   Wed, 5 Oct 2016 15:55:32 -0300
From:   Mauro Carvalho Chehab <mchehab@...pensource.com>
To:     Johannes Stezenbach <js@...uxtv.org>
Cc:     Jiri Kosina <jikos@...nel.org>,
        Patrick Boettcher <patrick.boettcher@...teo.de>,
        Jörg Otte <jrg.otte@...il.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Andy Lutomirski <luto@...nel.org>,
        Michael Krufky <mkrufky@...uxtv.org>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Linux Media Mailing List <linux-media@...r.kernel.org>
Subject: Re: Problem with VMAP_STACK=y

Hi Johannes,

Em Wed, 5 Oct 2016 20:29:45 +0200
Johannes Stezenbach <js@...uxtv.org> escreveu:

> On Wed, Oct 05, 2016 at 06:04:50AM -0300, Mauro Carvalho Chehab wrote:
> >  static int cinergyt2_frontend_attach(struct dvb_usb_adapter *adap)
> >  {
> > -	char query[] = { CINERGYT2_EP1_GET_FIRMWARE_VERSION };
> > -	char state[3];
> > +	struct dvb_usb_device *d = adap->dev;
> > +	struct cinergyt2_state *st = d->priv;
> >  	int ret;
> >  
> >  	adap->fe_adap[0].fe = cinergyt2_fe_attach(adap->dev);
> >  
> > -	ret = dvb_usb_generic_rw(adap->dev, query, sizeof(query), state,
> > -				sizeof(state), 0);  
> 
> it seems to miss this:
> 
> 	st->data[0] = CINERGYT2_EP1_GET_FIRMWARE_VERSION;
> 
> > +	ret = dvb_usb_generic_rw(d, st->data, 1, st->data, 3, 0);
> >  	if (ret < 0) {
> >  		deb_rc("cinergyt2_power_ctrl() Failed to retrieve sleep "
> >  			"state info\n");
> > @@ -141,13 +147,14 @@ static int repeatable_keys[] = {
> >  static int cinergyt2_rc_query(struct dvb_usb_device *d, u32 *event, int *state)
> >  {
> >  	struct cinergyt2_state *st = d->priv;
> > -	u8 key[5] = {0, 0, 0, 0, 0}, cmd = CINERGYT2_EP1_GET_RC_EVENTS;
> >  	int i;
> >  
> >  	*state = REMOTE_NO_KEY_PRESSED;
> >  
> > -	dvb_usb_generic_rw(d, &cmd, 1, key, sizeof(key), 0);
> > -	if (key[4] == 0xff) {
> > +	st->data[0] = CINERGYT2_EP1_SLEEP_MODE;  
> 
> should probably be
> 
> 	st->data[0] = CINERGYT2_EP1_GET_RC_EVENTS;
> 
> > +
> > +	dvb_usb_generic_rw(d, st->data, 1, st->data, 5, 0);  
> 
> 
> HTH,
> Johannes


Thanks for the review! Yeah, you're right: both firmware and remote
controller logic would be broken without the above fixes.

Just sent a version 2 of this patch to the ML with the above fixes.

Regards,
Mauro