On Sun, May 14, 2017 at 11:46:58AM +0200, Peter Meerwald-Stadler wrote:
>
> > If the timeout-case prints a warning message then probably the interrupted
> > case should also. Further, wait_for_completion_interruptible_timeout()
> > returns long not int.
> >
> > Fixes: commit 03b262f2bbf4 ("iio:pressure: initial zpa2326 barometer support")
> > Signed-off-by: Nicholas Mc Guire <der.herr@xxxxxxx>
>
> this is actually a v2, looks good to me
yup - I was just not clear if I should have marked is as V2
as not only the subject did change (simply because my first
assumption that the control-flow was buggy was wrong) and if
it would have been marked as V2 with no equivalent original
Patch would that make much sense ?
If it does, I´ll resend with a V2 tag and ref to the original
(wrong) Patch.
Thanks for the review
>
> > ---
> >
> > The original control-flow was technically not wrong just confusing and a bit
> > complicated. Not clear if reporting the interrupted case actually is useful,
> > but given that the timeout is relatively long (200ms) it is not that unlikely
> > so differentiating the cases seems helpful.
> >
> > Patch was compile-tested with: x86_64_defconfig + CONFIG_IIO=m, CONFIG_ZPA2326=m
> >
> > Patch is against v4.11 (localversion-next is next-20170512)
> >
> > drivers/iio/pressure/zpa2326.c | 17 ++++++++++-------
> > 1 file changed, 10 insertions(+), 7 deletions(-)
> >
> > diff --git a/drivers/iio/pressure/zpa2326.c b/drivers/iio/pressure/zpa2326.c
> > index e58a0ad..617926f 100644
> > --- a/drivers/iio/pressure/zpa2326.c
> > +++ b/drivers/iio/pressure/zpa2326.c
> > @@ -867,12 +867,13 @@ static int zpa2326_wait_oneshot_completion(const struct iio_dev *indio_dev,
> > {
> > int ret;
> > unsigned int val;
> > + long timeout;
> >
> > zpa2326_dbg(indio_dev, "waiting for one shot completion interrupt");
> >
> > - ret = wait_for_completion_interruptible_timeout(
> > + timeout = wait_for_completion_interruptible_timeout(
> > &private->data_ready, ZPA2326_CONVERSION_JIFFIES);
> > - if (ret > 0)
> > + if (timeout > 0)
> > /*
> > * Interrupt handler completed before timeout: return operation
> > * status.
> > @@ -882,13 +883,15 @@ static int zpa2326_wait_oneshot_completion(const struct iio_dev *indio_dev,
> > /* Clear all interrupts just to be sure. */
> > regmap_read(private->regmap, ZPA2326_INT_SOURCE_REG, &val);
> >
> > - if (!ret)
> > + if (!timeout) {
> > /* Timed out. */
> > + zpa2326_warn(indio_dev, "no one shot interrupt occurred (%ld)",
> > + timeout);
> > ret = -ETIME;
> > -
> > - if (ret != -ERESTARTSYS)
> > - zpa2326_warn(indio_dev, "no one shot interrupt occurred (%d)",
> > - ret);
> > + } else if (timeout < 0) {
> > + zpa2326_warn(indio_dev, "wait for one shot interrupt canceled");
> > + ret = -ERESTARTSYS;
> > + }
> >
> > return ret;
> > }
> >
>
> --
>
thx!
hofrat
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