linux-kernel - Re: [PATCH v2 2/2] serial: sprd: cleanup the sprd

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Date:   Wed, 18 Mar 2020 18:06:05 +0800
From:   Baolin Wang <baolin.wang7@...il.com>
To:     Chunyan Zhang <zhang.lyra@...il.com>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jiri Slaby <jslaby@...e.com>,
        "open list:SERIAL DRIVERS" <linux-serial@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Orson Zhai <orsonzhai@...il.com>,
        Chunyan Zhang <chunyan.zhang@...soc.com>
Subject: Re: [PATCH v2 2/2] serial: sprd: cleanup the sprd_port for error case

On Wed, Mar 18, 2020 at 5:16 PM Baolin Wang <baolin.wang7@...il.com> wrote:
>
> On Wed, Mar 18, 2020 at 4:31 PM Chunyan Zhang <zhang.lyra@...il.com> wrote:
> >
> > From: Chunyan Zhang <chunyan.zhang@...soc.com>
> >
> > It would be better to cleanup the sprd_port for the device before
> > return error.
> >
> > Signed-off-by: Chunyan Zhang <chunyan.zhang@...soc.com>
> > ---
> >  drivers/tty/serial/sprd_serial.c | 4 +++-
> >  1 file changed, 3 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/tty/serial/sprd_serial.c b/drivers/tty/serial/sprd_serial.c
> > index 9f8c14ff6454..54477de9822f 100644
> > --- a/drivers/tty/serial/sprd_serial.c
> > +++ b/drivers/tty/serial/sprd_serial.c
> > @@ -1204,8 +1204,10 @@ static int sprd_probe(struct platform_device *pdev)
> >         up->has_sysrq = IS_ENABLED(CONFIG_SERIAL_SPRD_CONSOLE);
> >
> >         ret = sprd_clk_init(up);
> > -       if (ret)
> > +       if (ret) {
> > +               sprd_port[index] = NULL;
>
> 如果我们强制使用alias, 则这里应该也无需清除了，因为一进probe就会给它重新赋值。 还是我漏了什么？

Sorry, please ignore my previsous comment. I made a stupid mistake
when talking with Chunyan.

So what I mean is we should not add this clean up, cause we will
always get the correct index with aliases, and it will be overlapped
when probing again.

>
>
> >                 return ret;
> > +       }
> >
> >         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> >         up->membase = devm_ioremap_resource(&pdev->dev, res);
> > --
> > 2.20.1
> >
>
>
> --
> Baolin Wang



--
Baolin Wang