From: Andy Shevchenko <andriy.shevchenko@intel.com>
To: Yasin Lee <yasin.lee.x@gmail.com>
Cc: "Jonathan Cameron" <jic23@kernel.org>,
"David Lechner" <dlechner@baylibre.com>,
"Nuno Sá" <nuno.sa@analog.com>,
"Andy Shevchenko" <andy@kernel.org>,
"Rob Herring" <robh@kernel.org>,
"Krzysztof Kozlowski" <krzk+dt@kernel.org>,
"Conor Dooley" <conor+dt@kernel.org>,
yasin.lee.x@outlook.com, linux-iio@vger.kernel.org,
linux-kernel@vger.kernel.org, devicetree@vger.kernel.org
Subject: Re: [PATCH v2 2/4] iio: proximity: hx9023s: Protect against division by zero in set_samp_freq
Date: Thu, 12 Feb 2026 12:55:57 +0200 [thread overview]
Message-ID: <aY2xveYRXEKIBV92@smile.fi.intel.com> (raw)
In-Reply-To: <20260212-upstream-20260219-v2-2-2b28fce5d09e@gmail.com>
On Thu, Feb 12, 2026 at 02:26:53PM +0800, Yasin Lee wrote:
> Avoid division by zero when sampling frequency is unspecified by
> falling back to a default 100ms sampling period.
...
> - period_ms = div_u64(NANO, (val * MEGA + val2));
> + if (val || val2)
> + period_ms = div_u64(NANO, (val * MEGA + val2));
While at it, drop unneeded parentheses.
> + else
> + /* Fallback to a safe default sampling period */
> + period_ms = 100;
Not sure about this. Perhaps we should rather do
if (!val || !val2)
return -EINVAL;
?
--
With Best Regards,
Andy Shevchenko
next prev parent reply other threads:[~2026-02-12 10:56 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-02-12 6:26 [PATCH v2 0/4] iio: proximity: hx9023s: firmware property, safety fixes Yasin Lee
2026-02-12 6:26 ` [PATCH v2 1/4] iio: proximity: hx9023s: fix out-of-bounds access when copying firmware Yasin Lee
2026-02-12 10:58 ` Andy Shevchenko
2026-02-12 11:25 ` Krzysztof Kozlowski
2026-02-12 13:48 ` Andy Shevchenko
2026-02-12 16:27 ` Krzysztof Kozlowski
2026-02-12 6:26 ` [PATCH v2 2/4] iio: proximity: hx9023s: Protect against division by zero in set_samp_freq Yasin Lee
2026-02-12 10:55 ` Andy Shevchenko [this message]
2026-02-12 16:44 ` Yasin Lee
2026-02-12 20:01 ` Andy Shevchenko
2026-02-12 6:26 ` [PATCH v2 3/4] dt-bindings: iio: proximity: hx9023s: support firmware-name property Yasin Lee
2026-02-12 11:23 ` Krzysztof Kozlowski
2026-02-12 17:36 ` Yasin Lee
2026-02-12 6:26 ` [PATCH v2 4/4] " Yasin Lee
2026-02-12 10:57 ` Andy Shevchenko
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