linux-kernel - RE: [PATCH 3/3] mmc: block: ioctl: Add error aggregation flag

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Date:   Mon, 15 May 2023 15:02:58 +0000
From:   Avri Altman <Avri.Altman@....com>
To:     Ulf Hansson <ulf.hansson@...aro.org>,
        Christian Löhle <CLoehle@...erstone.com>
CC:     Adrian Hunter <adrian.hunter@...el.com>,
        "linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH 3/3] mmc: block: ioctl: Add error aggregation flag

> > +        */
> > +       else if (idata->ic.write_flag & MMC_AGGREGATE_PROG_ERRORS) {
> > +               unsigned long timeout = jiffies +
> > +                       msecs_to_jiffies(busy_timeout_ms);
> > +               bool done = false;
> > +               unsigned long delay_ms = 1;
> > +               u32 status;
> > +
> > +               do {
> > +                       done = time_after(jiffies, timeout);
> > +                       msleep(delay_ms++);
> > +                       err = __mmc_send_status(card, &status, 1);
> > +                       if (err)
> > +                               return err;
> > +                       idata->ic.response[1] |= status;
> > +               } while (R1_CURRENT_STATE(status) != R1_STATE_TRAN &&
> !done);
> > +               if (done)
> > +                       return -ETIMEDOUT;
> > +       }
> 
> We have moved away from open-coding polling loops. Let's not introduce a
> new one. In fact, it looks a bit like we could re-use the
> mmc_blk_busy_cb() for this, as it seems to be collecting the error codes too.
> 
> In any case, let's at least make use of __mmc_poll_for_busy() to avoid the
> open-coding.
Or maybe use read_poll_timeout()?

Thanks,
Avri