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([2600:8803:e7e4:500:8b9c:d657:204d:5a5f]) by smtp.gmail.com with ESMTPSA id 006d021491bc7-679f2be9ab7sm8014857eaf.4.2026.03.01.15.57.38 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sun, 01 Mar 2026 15:57:38 -0800 (PST) Message-ID: Date: Sun, 1 Mar 2026 17:57:37 -0600 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [tip: irq/core] genirq: Warn about using IRQF_ONESHOT without a threaded handler From: David Lechner To: Jonathan Cameron , srinivas pandruvada Cc: Sebastian Andrzej Siewior , Bert Karwatzki , linux-kernel@vger.kernel.org, linux-iio@vger.kernel.org, Jiri Kosina , Thomas Gleixner , Laurent Pinchart References: <20260113120541.YVf2vRA3@linutronix.de> <20260202232741.13380-1-spasswolf@web.de> <20260203083826.1gOzxrwt@linutronix.de> <0a3433112f0bec3d5bd76c7ae9b6774b455203a6.camel@linux.intel.com> <20260207154218.2053c98c@jic23-huawei> Content-Language: en-US In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 3/1/26 5:17 PM, David Lechner wrote: > On 2/7/26 9:42 AM, Jonathan Cameron wrote: >> On Tue, 03 Feb 2026 09:29:25 -0800 >> srinivas pandruvada wrote: >> >>> On Tue, 2026-02-03 at 09:38 +0100, Sebastian Andrzej Siewior wrote: >>>> On 2026-02-03 00:27:40 [+0100], Bert Karwatzki wrote: >>>>> >>>>> The warning appears because iio_triggered_buffer_setup_ext() (in >>>>> drivers/iio/buffer/industrialio-triggered-buffer.c) is called with >>>>> thread = NULL >>>>> during the probe of the iio device and calls iio_alloc_pollfunc() >>>>> (in drivers/iio/industrialio-trigger.c) with thread = NULL and type >>>>> = IRQF_ONESHOT. > > > I noticed this while testing hid-sensor-rotation. > ... > > I saw that Jonathan mentioned some other more thorough approaches in > a later reply, but here is the "quick fix" I came up with. > I later found [1] that has an alternate fix, so no need to reply about my "solution" here. [1]: https://lore.kernel.org/linux-iio/20260220224514.471348-1-srinivas.pandruvada@linux.intel.com/