From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1794049087; b=HjlvG3JhoN9VWuXlN9envlGmKkTVpfKbjDX1AzUwVQZBYoWCKOJGHbSIYrRj5oMpAAN3 UPIrpIAAy4GR2HDPcglUd5AxqYYWjk2qUXu67xTGCBluFb5ttiNe22uatqiOrkcndv5aj SfSUyBbSCZiux0h/aQJhSgUEXXrkM54E+eY2pIxrW5t5VM9n86byeS78Sc2VsuJWgvDuh 8S1GCWtXy1QEwUw866pe3/fo0H8BrK618EPy7+rrIxnljfFXdAJvhBifB7uM0p/strb5M U9yGi8I8T33mi34H39DU0yLtei+gGqYEpDXkv5N1JHTlL2vFvUuPIv7BNit4TfjIUgA== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794049087; h=Received:DKIM-Signature:From:To:Cc:Subject:Date:Message-ID:X-Mailer: MIME-Version:Content-Type:Content-Transfer-Encoding; bh=BPm6BcRTo6amscd6+t+Q+ht+6hdmmcymsDcVcnn3Wzc=; b=3J9o/WO/lTjKOS0art20Q92sJwZ6ofvaNk7Te+8JT5HcA9VPWIeGwXxXKu63pBJAaIK9 cQ1ksnfuYvcol4BaugSRiHSUBXfQHABhpu4Uo9sq7Y768kpjDETg2bXGaEv/zgpONQ3MP +mxe2PwDF+fpeK6ZnITExR/tH7RhXQZhkOyzTKN1ylztz6AgU3oYi4a3C4CqB5S/uoWvd DmXHuiehJBZH4Mw81VHH+hY5LlpT1XBoZG5qskx13X1inkUdNW0+9esB9BUmQ2HaNbSgQ Fr2/4FJLg5oUMpz1tjLr1wIETlvwqKgPU1cSAqJNDssgHTsgrCge4Zw4wOxnyXGP5Cw== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=JEvDYTMv; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 75A7C606A32C for ; Sat, 7 Nov 2026 10:58:07 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=JEvDYTMv Received: by smtp.kernel.org (Postfix) with ESMTPSA id D28551F0089F; Sat, 7 Nov 2026 10:58:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1794049087; bh=BPm6BcRTo6amscd6+t+Q+ht+6hdmmcymsDcVcnn3Wzc=; h=From:To:Cc:Subject:Date; b=JEvDYTMvj+Wp3LNVhH8xGiJ0ZotuCG65eg804MGeDmyMcd6AOMiWyEuWV/Zuo7czn gDKMO2Y/5xTrcQkVIG7Snxmlm9I6Z1Z/Zi9mLQj+YMFog1uReP67vPj/6uHZV9m4QE gI4GYrWORXHGmKpKqb10Qa7KNzKnI/6smZ/jClZX1TknoKOqZz69Lpbxfhhii0Sgkw KRZI0nykm41zqz1SST0pEuu5rcnXQZOomidyKFSiyd+aau/LIpy+yw7eHvAAUjKDWc k6IrP8JfsfJWldudTbpWZJeBzqms9PTEjMyCOXuLIC5EuCYwhBCt72ydaj/U0a2pPa LW/3D5DCGT2TQ== From: Sasha Levin To: balakrishnan.s@microchip.com, ehristev@kernel.org, hverkuil+cisco@kernel.org Cc: stable@vger.kernel.org Subject: FAILED: patch "[PATCH] media: microchip-isc: synchronize the IRQ before disabling clocks on stop" failed to apply to 5.15-stable tree Date: Sat, 7 Nov 2026 05:58:05 -0500 Message-ID: <20261107055805-failed-5.15-19fa5407da5e@kernel.org> X-Mailer: git-send-email 2.53.0 X-Mailing-List: stable@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=UTF-8 Content-Transfer-Encoding: 8bit The patch below does not apply to the 5.15-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to . To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.15.y git checkout FETCH_HEAD git cherry-pick -x 19fa5407da5ef3e605cacfcd90f70d8b2c121cd7 # git commit -s git send-email --to '' --in-reply-to '20261107055805-failed-5.15-19fa5407da5e@kernel.org' --subject-prefix 'PATCH 5.15.y' 'HEAD^..' Thanks, Sasha ------------------ original commit in Linus's tree ------------------ >From 19fa5407da5ef3e605cacfcd90f70d8b2c121cd7 Mon Sep 17 00:00:00 2001 From: Balakrishnan Sambath Date: Mon, 17 Aug 2026 12:22:00 +0530 Subject: [PATCH] media: microchip-isc: synchronize the IRQ before disabling clocks on stop isc_stop_streaming() masks the DMA interrupt and then drops the runtime PM reference, which disables the ISC clocks. microchip_isc_interrupt() may still be executing on another CPU at that point; it reads ISC_INTSR over regmap, and touching the unclocked registers triggers an external abort. Store the IRQ number at probe and call synchronize_irq() after masking the interrupt, before dropping the PM reference. Fixes: 106267444f12 ("[media] atmel-isc: add the Image Sensor Controller code") Cc: stable@vger.kernel.org Signed-off-by: Balakrishnan Sambath Reviewed-by: Eugen Hristev Signed-off-by: Hans Verkuil --- drivers/media/platform/microchip/microchip-isc-base.c | 3 +++ drivers/media/platform/microchip/microchip-isc.h | 1 + drivers/media/platform/microchip/microchip-sama5d2-isc.c | 2 ++ drivers/media/platform/microchip/microchip-sama7g5-isc.c | 2 ++ 4 files changed, 8 insertions(+) diff --git a/drivers/media/platform/microchip/microchip-isc-base.c b/drivers/media/platform/microchip/microchip-isc-base.c index ca4f3b5f58aa9..debbc38717de1 100644 --- a/drivers/media/platform/microchip/microchip-isc-base.c +++ b/drivers/media/platform/microchip/microchip-isc-base.c @@ -425,6 +425,9 @@ static void isc_stop_streaming(struct vb2_queue *vq) /* Disable DMA interrupt */ regmap_write(isc->regmap, ISC_INTDIS, ISC_INT_DDONE); + /* let a running IRQ handler finish before the clock is disabled */ + synchronize_irq(isc->irq); + pm_runtime_put_sync(isc->dev); /* Disable stream on the sub device */ diff --git a/drivers/media/platform/microchip/microchip-isc.h b/drivers/media/platform/microchip/microchip-isc.h index ad4e98a1dd8fc..f5e322c2e36bc 100644 --- a/drivers/media/platform/microchip/microchip-isc.h +++ b/drivers/media/platform/microchip/microchip-isc.h @@ -287,6 +287,7 @@ struct isc_device { u32 dcfg; struct device *dev; + int irq; struct v4l2_device v4l2_dev; struct video_device video_dev; diff --git a/drivers/media/platform/microchip/microchip-sama5d2-isc.c b/drivers/media/platform/microchip/microchip-sama5d2-isc.c index 18e1ec0b94fa6..5bd109e93a8fb 100644 --- a/drivers/media/platform/microchip/microchip-sama5d2-isc.c +++ b/drivers/media/platform/microchip/microchip-sama5d2-isc.c @@ -448,6 +448,8 @@ static int microchip_isc_probe(struct platform_device *pdev) if (irq < 0) return irq; + isc->irq = irq; + ret = devm_request_irq(dev, irq, microchip_isc_interrupt, 0, "microchip-sama5d2-isc", isc); if (ret < 0) { diff --git a/drivers/media/platform/microchip/microchip-sama7g5-isc.c b/drivers/media/platform/microchip/microchip-sama7g5-isc.c index 07cfe1109ff09..d978ce448a4d2 100644 --- a/drivers/media/platform/microchip/microchip-sama7g5-isc.c +++ b/drivers/media/platform/microchip/microchip-sama7g5-isc.c @@ -437,6 +437,8 @@ static int microchip_xisc_probe(struct platform_device *pdev) if (irq < 0) return irq; + isc->irq = irq; + ret = devm_request_irq(dev, irq, microchip_isc_interrupt, 0, "microchip-sama7g5-xisc", isc); if (ret < 0) { -- 2.53.0