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From: Andy Shevchenko <andriy.shevchenko@intel.com>
To: Matti Vaittinen <mazziesaccount@gmail.com>
Cc: "Matti Vaittinen" <matti.vaittinen@fi.rohmeurope.com>,
	"Matti Vaittinen" <matti.vaittinen@linux.dev>,
	"Jonathan Cameron" <jic23@kernel.org>,
	"David Lechner" <dlechner@baylibre.com>,
	"Nuno Sá" <nuno.sa@analog.com>,
	"Andy Shevchenko" <andy@kernel.org>,
	"Mehdi Djait" <mehdi.djait.k@gmail.com>,
	linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2 2/4] iio: light: rohm-bu27034: Fix infinite delay on error
Date: Fri, 28 Aug 2026 10:53:37 +0300	[thread overview]
Message-ID: <apE-gauHWlJO8-5X@ashevche-desk.local> (raw)
In-Reply-To: <7f0d8efb3578cd4f23a7c70fa4a8f7a967c9df8e.1787901813.git.mazziesaccount@gmail.com>

On Fri, Aug 28, 2026 at 10:40:36AM +0300, Matti Vaittinen wrote:

> When reading an integration-time fails, the code will use error code to
> compute the sleep time.
> 
> Fix this by using the smallest integration time as a default if
> reading fails.

...

>  	wait_ms = bu27034_get_int_time(data);
> +
> +	/*
> +	 * If reading the integration time fails, default to the minimum so we
> +	 * don't lose samples. This may waste CPU cycles, but as a hardening
> +	 * against theoretical, once-in-a-blue-moon error, this should be Ok.
> +	 */
> +	if (wait_ms < 0)
> +		wait_ms = BU27034_INT_TIME_US_MIN;
> +
>  	wait_ms /= 1000;

With the above being open coded the _ms feels not right.
I would expect the TIME_MIN to be in MS from the start
(and for the consistency's sake with the below) and having
all this to be written like

	ret = bu27034_get_int_time(data);
	if (ret < 0)
		wait_ms = _MS_MIN;
	else
		wait_ms = ret / USEC_PER_MSEC;

>  	wait_ms -= BU27034_MEAS_WAIT_PREMATURE_MS;

-- 
With Best Regards,
Andy Shevchenko



  reply	other threads:[~2026-08-28  7:53 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-08-28  7:40 [PATCH v2 0/4] ROHM IIO fixes Matti Vaittinen
2026-08-28  7:40 ` [PATCH v2 1/4] iio: pressure: rohm-bm1390: Fix AVE_NUM initialization Matti Vaittinen
2026-08-28  7:40 ` [PATCH v2 2/4] iio: light: rohm-bu27034: Fix infinite delay on error Matti Vaittinen
2026-08-28  7:53   ` Andy Shevchenko [this message]
2026-08-28  9:46     ` Matti Vaittinen
2026-08-28 11:01       ` Andy Shevchenko
2026-08-30  1:16         ` Jonathan Cameron
2026-08-30  9:32           ` Matti Vaittinen
2026-08-28  7:40 ` [PATCH v2 3/4] iio: accel: kionix-kx022a: Prevent memory leak and fix state Matti Vaittinen
2026-08-28  7:56   ` Andy Shevchenko
2026-08-28  9:51     ` Matti Vaittinen
2026-08-30  1:22   ` Jonathan Cameron
2026-08-30  9:33     ` Matti Vaittinen
2026-08-28  7:41 ` [PATCH v2 4/4] iio: accel: kionix-kx022a: Fix IPOL macro name Matti Vaittinen

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