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[90.182.112.124]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4aa80f04785sm122659835e9.4.2026.10.30.01.24.39 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 30 Oct 2026 01:24:40 -0700 (PDT) Date: Fri, 30 Oct 2026 09:24:38 +0100 From: Joshua Crofts To: Greg Kroah-Hartman Cc: Jonathan Cameron , Josef Bacik , linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org, stable , David Lechner , Nuno =?ISO-8859-1?Q?S=E1?= , Andy Shevchenko , Matheus Silveira , Lucas Rabaquim , Stepan Ionichev , Joe Sandom Subject: Re: [PATCH 09/15] iio: light: tsl2591: don't divide by zero in the dark Message-ID: <20261030092438.000029bd@gmail.com> In-Reply-To: <20261027-llm-char-misc-iio-v1-9-0d818334f6c7@linuxfoundation.org> References: <20261027-llm-char-misc-iio-v1-0-0d818334f6c7@linuxfoundation.org> <20261027-llm-char-misc-iio-v1-9-0d818334f6c7@linuxfoundation.org> X-Mailer: Claws Mail 4.4.0 (GTK 3.24.51; x86_64-w64-mingw32) X-Mailing-List: linux-iio@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable On Tue, 27 Oct 2026 17:19:13 +0100 Greg Kroah-Hartman wrote: > From: Josef Bacik >=20 > The computation of the illuminance divides by the count of channel 0. > That is the channel which sees the whole spectrum: in complete darkness it > reads zero, and reading in_illuminance_input divides by zero. Depending > on the architecture this is an oops, a warning with a backtrace, or goes > unnoticed. >=20 > Report 0 lux in that case. >=20 > Fixes: 2335f0d7c790 ("iio: light: Added AMS tsl2591 driver implementation= ") > Cc: stable > Cc: David Lechner > Cc: "Nuno S=E1" > Cc: Andy Shevchenko > Cc: Josef Bacik > Cc: Matheus Silveira > Cc: Lucas Rabaquim > Cc: Stepan Ionichev > Cc: Joe Sandom > Signed-off-by: Josef Bacik > Signed-off-by: Greg Kroah-Hartman > --- Reviewed-by: Joshua Crofts --=20 Kind regards, Joshua Crofts