From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C378C33F378; Wed, 3 Dec 2025 15:54:36 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764777276; cv=none; b=LNG8xIsh9auf7LUu49ZxUAaF5YAQBPvhb3/L+5TuFgzvIGGEjdw9/tby98Ux+aFPFxIwB8aqUkX6BnIz/6aU+KFZebKpWHHpFn4bZllbjAcxU3RniJEEUSzg5w/XZyyf57kfC/2S6Te2WdHCEXUtmyf/Y68oVciLVO/DOK0M6t8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764777276; c=relaxed/simple; bh=ndJIU30GsZq+qv2giXZ4UDkh+DXUiRu88rA6/yReQEQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=tIzvQlysfvEe51NlnmZn+cerNxSzfTITAqH9H9b3dtjGVVML3WoPhpKau5olBcLjrwtQcDM2Lp7Me7nBgkdxc1UhtL0mxFHeIuxXJ96++EMTMREwledOgiA7AqOHYF9c1XO+aBbT5zo6xCfd4IJfecVALS2NMwU5kH/6EI3JDJU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=Rp5LJU1L; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="Rp5LJU1L" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2C2F9C4CEF5; Wed, 3 Dec 2025 15:54:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1764777276; bh=ndJIU30GsZq+qv2giXZ4UDkh+DXUiRu88rA6/yReQEQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Rp5LJU1LgXTdZz6aSY2ymyFHkMtqjRUHuumBIM50mvfWSmm+UfqWsPo89QLBNIvD/ ufd/qrSmsF97OVEv3gq1ji1UvxOG7U0HgL7Auvq0QpfhIQsgCa2fRL/nsfyBte7cRm H3VztinGXfI2P9fdMFvIaUHG+Ck7uUbtNJIN41ps= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Andrew Lunn , "Bastien Curutchet (Schneider Electric)" , Paolo Abeni Subject: [PATCH 6.17 135/146] net: dsa: microchip: ptp: Fix checks on irq_find_mapping() Date: Wed, 3 Dec 2025 16:28:33 +0100 Message-ID: <20251203152351.414831931@linuxfoundation.org> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20251203152346.456176474@linuxfoundation.org> References: <20251203152346.456176474@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.17-stable review patch. If anyone has any objections, please let me know. ------------------ From: Bastien Curutchet (Schneider Electric) commit 9e059305be41a5bd27e03458d8333cf30d70be34 upstream. irq_find_mapping() returns a positive IRQ number or 0 if no IRQ is found but it never returns a negative value. However, during the PTP IRQ setup, we verify that its returned value isn't negative. Fix the irq_find_mapping() check to enter the error path when 0 is returned. Return -EINVAL in such case. Cc: stable@vger.kernel.org Fixes: cc13ab18b201 ("net: dsa: microchip: ptp: enable interrupt for timestamping") Reviewed-by: Andrew Lunn Signed-off-by: Bastien Curutchet (Schneider Electric) Link: https://patch.msgid.link/20251120-ksz-fix-v6-2-891f80ae7f8f@bootlin.com Signed-off-by: Paolo Abeni Signed-off-by: Greg Kroah-Hartman --- drivers/net/dsa/microchip/ksz_ptp.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/drivers/net/dsa/microchip/ksz_ptp.c +++ b/drivers/net/dsa/microchip/ksz_ptp.c @@ -1139,8 +1139,8 @@ int ksz_ptp_irq_setup(struct dsa_switch irq_create_mapping(ptpirq->domain, irq); ptpirq->irq_num = irq_find_mapping(port->pirq.domain, PORT_SRC_PTP_INT); - if (ptpirq->irq_num < 0) { - ret = ptpirq->irq_num; + if (!ptpirq->irq_num) { + ret = -EINVAL; goto out; }