Re: [PATCH] media: dvb: mt352, change i2c read buffer from stack, to kernel space

From: Mauro Carvalho Chehab
Date: Fri Nov 19 2021 - 11:17:21 EST


Em Fri, 19 Nov 2021 16:16:12 +0000
Mauro Carvalho Chehab <mchehab@xxxxxxxxxx> escreveu:

> Em Thu, 7 Oct 2021 13:44:06 +0200
> rkardell <rkardell@xxxxxxx> escreveu:
>
> > Solve problem with initialization of Mega Sky 580 USB DVB (and other
> > using mt352), error when reading i2c id.
>
> This patch is full of 0xa0 characters instead of spaces, causing it
> to be rejected. Probably either your e-mailer of your text editor is doing
> something wrong. Please fix and resend.
>
> Thanks!
> Mauro
>
> >
> >
> > Signed-off-by: rkl099 <rkardell@xxxxxxx>

Ah, the SoB and the "From:" should use your real name.

Regards,
Mauro


> > ---
> >  drivers/media/dvb-frontends/mt352.c | 9 ++++++---
> >  1 file changed, 6 insertions(+), 3 deletions(-)
> >
> > diff --git a/drivers/media/dvb-frontends/mt352.c
> > b/drivers/media/dvb-frontends/mt352.c
> > index 399d5c519..d7f33558d 100644
> > --- a/drivers/media/dvb-frontends/mt352.c
> > +++ b/drivers/media/dvb-frontends/mt352.c
> > @@ -69,7 +69,7 @@ static int mt352_read_register(struct mt352_state*
> > state, u8 reg)
> >  {
> >         int ret;
> >         u8 b0 [] = { reg };
> > -       u8 b1 [] = { 0 };
> > +    u8 *b1=kmalloc(1,GFP_KERNEL);
> >         struct i2c_msg msg [] = { { .addr = state->config.demod_address,
> >                                     .flags = 0,
> >                                     .buf = b0, .len = 1 },
> > @@ -82,12 +82,15 @@ static int mt352_read_register(struct mt352_state*
> > state, u8 reg)
> >         if (ret != 2) {
> >                 printk("%s: readreg error (reg=%d, ret==%i)\n",
> >                        __func__, reg, ret);
> > +               kfree(b1);
> >                 return ret;
> >         }
> > -
> > -       return b1[0];
> > +    ret=b1[0];
> > +    kfree(b1);
> > +       return ret;
> >  }
> >
> > +
> >  static int mt352_sleep(struct dvb_frontend* fe)
> >  {
> >         static u8 mt352_softdown[] = { CLOCK_CTL, 0x20, 0x08 };