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Message-ID: <20230831085728.0becee29@xps-13>
Date: Thu, 31 Aug 2023 08:57:28 +0200
From: Miquel Raynal <miquel.raynal@...tlin.com>
To: Frank Li <Frank.li@....com>
Cc: alexandre.belloni@...tlin.com, conor.culhane@...vaco.com,
imx@...ts.linux.dev, linux-i3c@...ts.infradead.org,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/2] i3c: master: fixes i3c bus driver probe failure
if no i3c device attached
Hi Frank,
Frank.li@....com wrote on Wed, 30 Aug 2023 12:32:28 -0400:
> On Wed, Aug 30, 2023 at 05:53:55PM +0200, Miquel Raynal wrote:
> > Hi Frank,
> >
> > Frank.Li@....com wrote on Wed, 30 Aug 2023 10:17:26 -0400:
> >
> > > In i3c_master_bus_init()
> > > { ...
> > > ret = i3c_master_rstdaa_locked(master, I3C_BROADCAST_ADDR);
> > > if (ret && ret != I3C_ERROR_M2)
> > > ^^^ // it is enum i3c_error_code
> > > ...
> > > }
> > >
> > > In dw-i3c-master.c implementation:
> > > dw_i3c_ccc_set()
> > > { ...
> > > ret = xfer->ret;
> > > if (xfer->cmds[0].error == RESPONSE_ERROR_IBA_NACK)
> > > ccc->err = I3C_ERROR_M2;
> > >
> > > dw_i3c_master_free_xfer(xfer);
> > >
> > > return ret;
> > > }
> > >
> > > Return enum i3c_error_code when error happen in i3c_master_rstdaa_locked().
> >
> > I am sorry but the commit log needs to be worked on.
> >
> > >
> > > Cc: stable@...r.kernel.org
> > > Fixes: 3a379bbcea0a ("i3c: Add core I3C infrastructure")
> > > Signed-off-by: Frank Li <Frank.Li@....com>
> > > ---
> > >
> > > Notes:
> > > Change from v1 to v2:
> > > - cc stable
> > >
> > > drivers/i3c/master.c | 3 +++
> > > 1 file changed, 3 insertions(+)
> > >
> > > diff --git a/drivers/i3c/master.c b/drivers/i3c/master.c
> > > index 08aeb69a78003..00a82f3ab9ac0 100644
> > > --- a/drivers/i3c/master.c
> > > +++ b/drivers/i3c/master.c
> > > @@ -783,6 +783,9 @@ static int i3c_master_rstdaa_locked(struct i3c_master_controller *master,
> > > ret = i3c_master_send_ccc_cmd_locked(master, &cmd);
> > > i3c_ccc_cmd_dest_cleanup(&dest);
> > >
> > > + if (ret)
> > > + ret = cmd.err;
> >
> > Shouldn't this happen in i3c_master_send_ccc_cmd_locked()?
>
> Sorry, This patch is not necesary at all.
> i3c_master_send_ccc_cmd_locked() already handled it.
> Only need second patch. You can discard this patch.
>
> Do you need me send 2nd patch only? Or you can just pick 2nd one?
It is quite unclear what you are finally trying to do. Please send a
proper v3, with a changelog.
>
> >
> > > +
> > > return ret;
> > > }
> > >
> >
> >
> > Thanks,
> > Miquèl
Thanks,
Miquèl
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