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 7F08633C539; Wed, 3 Dec 2025 15:54:50 +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=1764777290; cv=none; b=f4iIWhFe77MmqSUJQxFBm8DV8qjCsUIaa6x0UK85gJGs4Vz9P33XuhlSTY1EPbABrj8GVouNgf3q5/ZSoGnUVFSm7V21j4gYtuwW25iChgRqhT+5UQRw8/9GPZIUz1Z8wCGIZVbr33v+0lu8WgL7XznQymPxuAkLuEW0IqYiZpI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764777290; c=relaxed/simple; bh=bSdO3J8R/Mj6uLKJzrAOIHmwcRB+Hd2839nsTGTKTJ4=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=cGcpUSUN9Rx1bvqpTYPUhKeSHkglJUEbk3waTllA54rcKpeih4+NhGm5tJr1y5na1WY6KEPABDjRLJ2nNlez+Ku78Jv6ogMAB3lfbcppVM9L1n2y6gjpCCJJ91bHxjKrfI8V4esZcQBwJ17TIniCdgAM2ii7GjjXkiStmbBBfX4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=m9OqQimv; 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="m9OqQimv" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 025C0C4CEF5; Wed, 3 Dec 2025 15:54:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1764777290; bh=bSdO3J8R/Mj6uLKJzrAOIHmwcRB+Hd2839nsTGTKTJ4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=m9OqQimveuYoiiHz212O72RUoivo3CT4dYBLNHigQbzlqLKzJu0XhSjjYZkCCL1Ik RjZ67g2BD/e3eH6CCIOtZag/Y6a9zRsHuqGk7suQUM7SHWRvjLR6gjJeti4j85q6Lb I04ImqeSQs4zoOCYZ5pDMa5ln79fa1CDbA/1xAl4= 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 6.17 138/146] net: dsa: microchip: Fix symetry in ksz_ptp_msg_irq_{setup/free}() Date: Wed, 3 Dec 2025 16:28:36 +0100 Message-ID: <20251203152351.523524303@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 d0b8fec8ae50525b57139393d0bb1f446e82ff7e upstream. The IRQ numbers created through irq_create_mapping() are only assigned to ptpmsg_irq[n].num at the end of the IRQ setup. So if an error occurs between their creation and their assignment (for instance during the request_threaded_irq() step), we enter the error path and fail to release the newly created virtual IRQs because they aren't yet assigned to ptpmsg_irq[n].num. Move the mapping creation to ksz_ptp_msg_irq_setup() to ensure symetry with what's released by ksz_ptp_msg_irq_free(). In the error path, move the irq_dispose_mapping to the out_ptp_msg label so it will be called only on created IRQs. 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-v6-5-891f80ae7f8f@bootlin.com Signed-off-by: Paolo Abeni Signed-off-by: Greg Kroah-Hartman --- drivers/net/dsa/microchip/ksz_ptp.c | 18 +++++++----------- 1 file changed, 7 insertions(+), 11 deletions(-) --- a/drivers/net/dsa/microchip/ksz_ptp.c +++ b/drivers/net/dsa/microchip/ksz_ptp.c @@ -1093,19 +1093,19 @@ static int ksz_ptp_msg_irq_setup(struct static const char * const name[] = {"pdresp-msg", "xdreq-msg", "sync-msg"}; const struct ksz_dev_ops *ops = port->ksz_dev->dev_ops; + struct ksz_irq *ptpirq = &port->ptpirq; struct ksz_ptp_irq *ptpmsg_irq; ptpmsg_irq = &port->ptpmsg_irq[n]; + ptpmsg_irq->num = irq_create_mapping(ptpirq->domain, n); + if (!ptpmsg_irq->num) + return -EINVAL; ptpmsg_irq->port = port; ptpmsg_irq->ts_reg = ops->get_port_addr(port->num, ts_reg[n]); strscpy(ptpmsg_irq->name, name[n]); - ptpmsg_irq->num = irq_find_mapping(port->ptpirq.domain, n); - if (ptpmsg_irq->num < 0) - return ptpmsg_irq->num; - return request_threaded_irq(ptpmsg_irq->num, NULL, ksz_ptp_msg_thread_fn, IRQF_ONESHOT, ptpmsg_irq->name, ptpmsg_irq); @@ -1135,9 +1135,6 @@ int ksz_ptp_irq_setup(struct dsa_switch if (!ptpirq->domain) return -ENOMEM; - for (irq = 0; irq < ptpirq->nirqs; irq++) - irq_create_mapping(ptpirq->domain, irq); - ptpirq->irq_num = irq_find_mapping(port->pirq.domain, PORT_SRC_PTP_INT); if (!ptpirq->irq_num) { ret = -EINVAL; @@ -1159,12 +1156,11 @@ int ksz_ptp_irq_setup(struct dsa_switch out_ptp_msg: free_irq(ptpirq->irq_num, ptpirq); - while (irq--) + while (irq--) { free_irq(port->ptpmsg_irq[irq].num, &port->ptpmsg_irq[irq]); -out: - for (irq = 0; irq < ptpirq->nirqs; irq++) irq_dispose_mapping(port->ptpmsg_irq[irq].num); - + } +out: irq_domain_remove(ptpirq->domain); return ret;