From nobody Sun Feb 8 18:31:25 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 31CC682866; Sun, 16 Nov 2025 02:44:46 +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=1763261091; cv=none; b=VvEAVVDt22DuTSufZSf8nCDpOZJrO+wkr+lgtUtP45UHy8BVCy2/i3ZfpKOvwRmKUpIgphtIOoSSpgHJYSzRaRyTrhvpEqLOVL1aFLQfncIO8B+1TFk9TZwSLvRiSNrl+svGS6Vubt9YiAOYC3Rt1QOLByQTZ/UiAFcGDyHzxv4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763261091; c=relaxed/simple; bh=ESzJpiBooaawubAvyvKPHMB+wWYpbqR4O6qNHSTLqxU=; h=From:To:Cc:Subject:Date:Message-Id; b=Xoqz0QuSoZOH66D2OpxL/WWm2mpYxx/H7GFGnpVleze0w2i4Y1zFDpXH+JL5B7IwbtX3qy0ZEAl08SEDqrIlxIE/FuTJhIYOKRr4kYfcJoyCJHrdFisAb8C2AxruwvCo7LyIwYxE93BAifaq8um8o3DNKCuV9VDPH99eakKQ4Mc= 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.localdomain (unknown [202.112.113.212]) by APP-03 (Coremail) with SMTP id rQCowACnONt9OhlphMrrAA--.5337S2; Sun, 16 Nov 2025 10:44:20 +0800 (CST) From: Ma Ke To: maddy@linux.ibm.com, mpe@ellerman.id.au, npiggin@gmail.com, christophe.leroy@csgroup.eu, make24@iscas.ac.cn, benh@kernel.crashing.org, smaclennan@pikatech.com Cc: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, akpm@linux-foundation.org, stable@vger.kernel.org Subject: [PATCH] powerpc/warp: Fix error handling in pika_dtm_thread Date: Sun, 16 Nov 2025 10:44:11 +0800 Message-Id: <20251116024411.21968-1-make24@iscas.ac.cn> X-Mailer: git-send-email 2.17.1 X-CM-TRANSID: rQCowACnONt9OhlphMrrAA--.5337S2 X-Coremail-Antispam: 1UD129KBjvdXoWrtrW7tryDtFy8Xr17Cw17KFg_yoWftwb_Ka 109a97urW8Wr4qk3Wqyr1fGrZxJ39rJ34UKw1qg3W2ya45Xa95Xw4FyrZ5uw17ursFkr43 Jan5WrsrC3WS9jkaLaAFLSUrUUUUjb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUIcSsGvfJTRUUUbDAFF20E14v26r4j6ryUM7CY07I20VC2zVCF04k26cxKx2IYs7xG 6rWj6s0DM7CIcVAFz4kK6r1j6r18M28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48ve4kI8w A2z4x0Y4vE2Ix0cI8IcVAFwI0_JFI_Gr1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI0_Gr0_ Cr1l84ACjcxK6I8E87Iv67AKxVW8Jr0_Cr1UM28EF7xvwVC2z280aVCY1x0267AKxVW8Jr 0_Cr1UM2vYz4IE04k24VAvwVAKI4IrM2AIxVAIcxkEcVAq07x20xvEncxIr21l5I8CrVAC Y4xI64kE6c02F40Ex7xfMcIj6xIIjxv20xvE14v26r1j6r18McIj6I8E87Iv67AKxVWUJV W8JwAm72CE4IkC6x0Yz7v_Jr0_Gr1lF7xvr2IYc2Ij64vIr41lF7I21c0EjII2zVCS5cI2 0VAGYxC7M4IIrI8v6xkF7I0E8cxan2IY04v7MxkF7I0En4kS14v26r1q6r43MxkIecxEwV AFwVW8JwCF04k20xvY0x0EwIxGrwCFx2IqxVCFs4IE7xkEbVWUJVW8JwC20s026c02F40E 14v26r1j6r18MI8I3I0E7480Y4vE14v26r106r1rMI8E67AF67kF1VAFwI0_Jw0_GFylIx kGc2Ij64vIr41lIxAIcVC0I7IYx2IY67AKxVWUJVWUCwCI42IY6xIIjxv20xvEc7CjxVAF wI0_Gr0_Cr1lIxAIcVCF04k26cxKx2IYs7xG6r1j6r1xMIIF0xvEx4A2jsIE14v26r1j6r 4UMIIF0xvEx4A2jsIEc7CjxVAFwI0_Gr0_Gr1UYxBIdaVFxhVjvjDU0xZFpf9x0JUmLvtU UUUU= X-CM-SenderInfo: ppdnvj2u6l2u1dvotugofq/ Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" pika_dtm_thread() acquires client through of_find_i2c_device_by_node() but fails to release it in error handling path. This could result in a reference count leak, preventing proper cleanup and potentially leading to resource exhaustion. Add put_device() to release the reference in the error handling path. Found by code review. Cc: stable@vger.kernel.org Fixes: 3984114f0562 ("powerpc/warp: Platform fix for i2c change") Signed-off-by: Ma Ke Reviewed-by: Christophe Leroy --- arch/powerpc/platforms/44x/warp.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/powerpc/platforms/44x/warp.c b/arch/powerpc/platforms/44x= /warp.c index a5001d32f978..6f674f86dc85 100644 --- a/arch/powerpc/platforms/44x/warp.c +++ b/arch/powerpc/platforms/44x/warp.c @@ -293,6 +293,8 @@ static int pika_dtm_thread(void __iomem *fpga) schedule_timeout(HZ); } =20 + put_device(&client->dev); + return 0; } =20 --=20 2.17.1