From nobody Sun Feb 8 22:51:05 2026 Received: from cstnet.cn (smtp81.cstnet.cn [159.226.251.81]) (using TLSv1.2 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7B9BC248881 for ; Mon, 19 Jan 2026 05:57:44 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=159.226.251.81 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768802268; cv=none; b=lNjFd9dgrh2yk/tYnFY5xcoMyMZ8acCojpgiPZvKjJq1TYPJt/JJuuFrJpMYYPOPuumsrAzhKQdE8RQZ6Ha4LPx9h0I+bzaYYAtT5EPVEioupJMtXu6ON99b8emumsKbcY9uKuLPM9xXdz7wIYk6YVLZ/Fyl3ZJMkyxlu40GeHQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768802268; c=relaxed/simple; bh=8JbXTH0siI1WN+cQlJWdGZVPmdUVZ8nLZtgU9CDYFmQ=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=RZJA6yMdAOcPbc5MhzYL9TBaHptNC66ECCOwO8Ok0feKPMSLqHjcpNBhBRQjT1HRDu6PQqO8VU1QvC7MZq/B5eAbgc/LIz4SNPTL5bIGuVThajUDfu8rrti6Uj0lR0LsLIN1zBjH3ptaQFqTO6TmwHFE8Lzxxc8AfMIaSToXobo= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=iscas.ac.cn; spf=pass smtp.mailfrom=iscas.ac.cn; arc=none smtp.client-ip=159.226.251.81 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=iscas.ac.cn Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=iscas.ac.cn Received: from localhost (unknown [124.16.138.129]) by APP-03 (Coremail) with SMTP id rQCowADX9NvOx21pkW+9BQ--.64349S2; Mon, 19 Jan 2026 13:57:34 +0800 (CST) From: Chen Ni To: qiang.zhao@nxp.com, chleroy@kernel.org Cc: linuxppc-dev@lists.ozlabs.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Chen Ni Subject: [PATCH] soc: fsl: qe: qe_ports_ic: Consolidate chained IRQ handler install/remove Date: Mon, 19 Jan 2026 13:57:15 +0800 Message-Id: <20260119055715.889001-1-nichen@iscas.ac.cn> X-Mailer: git-send-email 2.25.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: rQCowADX9NvOx21pkW+9BQ--.64349S2 X-Coremail-Antispam: 1UD129KBjvdXoW7Jr1fKr4kGryrKryxXw1DKFg_yoWDtrXE9w 4jvr97Wr10vr9IvF12kwsxAFyrZr4UWwn29wsYqayay348trW5XFy2qFnxCrn7WF48Arnr Grn8Z393C348ujkaLaAFLSUrUUUUbb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUIcSsGvfJTRUUUbs8FF20E14v26r1j6r4UM7CY07I20VC2zVCF04k26cxKx2IYs7xG 6rWj6s0DM7CIcVAFz4kK6r1j6r18M28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48ve4kI8w A2z4x0Y4vE2Ix0cI8IcVAFwI0_Xr0_Ar1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI0_Gr0_ Cr1l84ACjcxK6I8E87Iv67AKxVWxJr0_GcWl84ACjcxK6I8E87Iv6xkF7I0E14v26rxl6s 0DM2AIxVAIcxkEcVAq07x20xvEncxIr21l5I8CrVACY4xI64kE6c02F40Ex7xfMcIj6xII jxv20xvE14v26rWY6Fy7McIj6I8E87Iv67AKxVWYoVW2owAm72CE4IkC6x0Yz7v_Jr0_Gr 1lF7xvr2IYc2Ij64vIr41lF7I21c0EjII2zVCS5cI20VAGYxC7MxkF7I0En4kS14v26r12 6r1DMxkIecxEwVAFwVW8WwCF04k20xvY0x0EwIxGrwCFx2IqxVCFs4IE7xkEbVWUJVW8Jw C20s026c02F40E14v26r1j6r18MI8I3I0E7480Y4vE14v26r106r1rMI8E67AF67kF1VAF wI0_JF0_Jw1lIxkGc2Ij64vIr41lIxAIcVC0I7IYx2IY67AKxVWUJVWUCwCI42IY6xIIjx v20xvEc7CjxVAFwI0_Jr0_Gr1lIxAIcVCF04k26cxKx2IYs7xG6r1j6r1xMIIF0xvEx4A2 jsIE14v26r1j6r4UMIIF0xvEx4A2jsIEc7CjxVAFwI0_Jr0_GrUvcSsGvfC2KfnxnUUI43 ZEXa7sR_AR65UUUUU== X-CM-SenderInfo: xqlfxv3q6l2u1dvotugofq/ Content-Type: text/plain; charset="utf-8" The driver currently sets the handler data and the chained handler in two separate steps. This creates a theoretical race window where an interrupt could fire after the handler is set but before the data is assigned, leading to a NULL pointer dereference. Replace the two calls with irq_set_chained_handler_and_data() to set both the handler and its data atomically under the irq_desc->lock. Signed-off-by: Chen Ni --- drivers/soc/fsl/qe/qe_ports_ic.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/drivers/soc/fsl/qe/qe_ports_ic.c b/drivers/soc/fsl/qe/qe_ports= _ic.c index 61dd09fec6f6..8e2107e2cde5 100644 --- a/drivers/soc/fsl/qe/qe_ports_ic.c +++ b/drivers/soc/fsl/qe/qe_ports_ic.c @@ -114,8 +114,7 @@ static int qepic_probe(struct platform_device *pdev) if (!data->host) return -ENODEV; =20 - irq_set_handler_data(irq, data); - irq_set_chained_handler(irq, qepic_cascade); + irq_set_chained_handler_and_data(irq, qepic_cascade, data); =20 return 0; } --=20 2.25.1