linux-kernel - Re: [PATCH v2 3/3] serial: core: Update uart_poll_timeout() function to return unsigned long

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Message-ID: <CAMTSyjoE+3B=ACLW4=Pz-otu4q7fMU1OXE-fmTdvVu569906Tw@mail.gmail.com>
Date:   Thu, 26 Oct 2023 18:00:01 +0530
From:   VAMSHI GAJJELA <vamshigajjela@...gle.com>
To:     Jiri Slaby <jirislaby@...nel.org>
Cc:     Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-serial <linux-serial@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>, manugautam@...gle.com,
        Subhash Jadavani <sjadavani@...gle.com>,
        Channa Kadabi <kadabi@...gle.com>
Subject: Re: [PATCH v2 3/3] serial: core: Update uart_poll_timeout() function
 to return unsigned long

On Thu, Oct 26, 2023 at 3:19 PM Jiri Slaby <jirislaby@...nel.org> wrote:
>
> On 26. 10. 23, 11:24, Ilpo Järvinen wrote:
> > On Thu, 26 Oct 2023, Jiri Slaby wrote:
> >
> >> On 25. 10. 23, 16:26, Vamshi Gajjela wrote:
> >>> From: VAMSHI GAJJELA <vamshigajjela@...gle.com>
> >>>
> >>> The function uart_fifo_timeout() returns an unsigned long value, which is
> >>> the number of jiffies. Therefore, the function uart_poll_timeout() has been
> >>> modified to use an unsigned long type for timeout values instead of an int
> >>> and to avoid truncation.
> >>
> >> Hi,
> >>
> >> there is no truncation possible, right?
> >
> > That's very likely true (I didn't run the calculations), thus it's correct
> > to not have Fixes tag.
>
> Good. I would remove that "and to avoid truncation" completely from the
> commit log. I would only say that we are getting things consistent.
>
> "avoid truncation" can lead to -> we should backport it to stable. And
> neither is true.
I will drop "and to avoid truncation".
>
> > It's more about having consistent typing since
> > we're talking about jiffies, so unsigned long as usual.
>
> Yeah and that's of course fine by me.
>
> thanks,
> --
> js
> suse labs
>