netdev - Re: [PATCH] can: rcar_can: Fix suspend/resume

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Date:   Wed, 22 Sep 2021 17:23:36 +0200
From:   Simon Horman <horms@...nel.org>
To:     Ulrich Hecht <uli@...nd.eu>
Cc:     Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>,
        wg@...ndegger.com, mkl@...gutronix.de, davem@...emloft.net,
        kuba@...nel.org, linux-can@...r.kernel.org, netdev@...r.kernel.org,
        linux-renesas-soc@...r.kernel.org,
        Ayumi Nakamichi <ayumi.nakamichi.kf@...esas.com>
Subject: Re: [PATCH] can: rcar_can: Fix suspend/resume

On Tue, Sep 21, 2021 at 12:38:13PM +0200, Ulrich Hecht wrote:
> 
> > On 09/21/2021 7:19 AM Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com> wrote:
> > 
> >  
> > If the driver was not opened, rcar_can_suspend() should not call
> > clk_disable() because the clock was not enabled.
> > 
> > Fixes: fd1159318e55 ("can: add Renesas R-Car CAN driver")
> > Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>
> > Tested-by: Ayumi Nakamichi <ayumi.nakamichi.kf@...esas.com>
> > ---
> >  drivers/net/can/rcar/rcar_can.c | 21 +++++++++++++--------
> >  1 file changed, 13 insertions(+), 8 deletions(-)
> > 
> > diff --git a/drivers/net/can/rcar/rcar_can.c b/drivers/net/can/rcar/rcar_can.c
> > index 00e4533c8bdd..6b4eefb03044 100644
> > --- a/drivers/net/can/rcar/rcar_can.c
> > +++ b/drivers/net/can/rcar/rcar_can.c

...

> > @@ -858,6 +860,7 @@ static int __maybe_unused rcar_can_suspend(struct device *dev)
> >  	priv->can.state = CAN_STATE_SLEEPING;
> >  
> >  	clk_disable(priv->clk);
> > +
> >  	return 0;
> >  }
> >  

nit: this hunk seems unrelated to the rest of the patch

...