From patchwork Tue Oct 8 11:13:42 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Heikki Krogerus X-Patchwork-Id: 11179403 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 45F27139A for ; Tue, 8 Oct 2019 11:13:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 302C120815 for ; Tue, 8 Oct 2019 11:13:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730317AbfJHLNy (ORCPT ); Tue, 8 Oct 2019 07:13:54 -0400 Received: from mga02.intel.com ([134.134.136.20]:26010 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729790AbfJHLNy (ORCPT ); Tue, 8 Oct 2019 07:13:54 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by orsmga101.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 08 Oct 2019 04:13:53 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.67,270,1566889200"; d="scan'208";a="206618904" Received: from black.fi.intel.com (HELO black.fi.intel.com.) ([10.237.72.28]) by fmsmga001.fm.intel.com with ESMTP; 08 Oct 2019 04:13:52 -0700 From: Heikki Krogerus To: Guenter Roeck Cc: linux-usb@vger.kernel.org Subject: [PATCH v3 1/9] usb: typec: Copy everything from struct typec_capability during registration Date: Tue, 8 Oct 2019 14:13:42 +0300 Message-Id: <20191008111350.68581-2-heikki.krogerus@linux.intel.com> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20191008111350.68581-1-heikki.krogerus@linux.intel.com> References: <20191008111350.68581-1-heikki.krogerus@linux.intel.com> MIME-Version: 1.0 Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org Copying everything from struct typec_capability to struct typec_port during port registration. This will make sure that under no circumstances the driver can change the values in the struct typec_capability that the port uses. Signed-off-by: Heikki Krogerus --- drivers/usb/typec/class.c | 15 +++++++++------ 1 file changed, 9 insertions(+), 6 deletions(-) diff --git a/drivers/usb/typec/class.c b/drivers/usb/typec/class.c index 94a3eda62add..0bbf10c8ad58 100644 --- a/drivers/usb/typec/class.c +++ b/drivers/usb/typec/class.c @@ -52,6 +52,7 @@ struct typec_port { struct typec_switch *sw; struct typec_mux *mux; + const struct typec_capability *orig_cap; /* to be removed */ const struct typec_capability *cap; }; @@ -968,7 +969,7 @@ preferred_role_store(struct device *dev, struct device_attribute *attr, return -EINVAL; } - ret = port->cap->try_role(port->cap, role); + ret = port->cap->try_role(port->orig_cap, role); if (ret) return ret; @@ -1014,7 +1015,7 @@ static ssize_t data_role_store(struct device *dev, goto unlock_and_ret; } - ret = port->cap->dr_set(port->cap, ret); + ret = port->cap->dr_set(port->orig_cap, ret); if (ret) goto unlock_and_ret; @@ -1071,7 +1072,7 @@ static ssize_t power_role_store(struct device *dev, goto unlock_and_ret; } - ret = port->cap->pr_set(port->cap, ret); + ret = port->cap->pr_set(port->orig_cap, ret); if (ret) goto unlock_and_ret; @@ -1119,7 +1120,7 @@ port_type_store(struct device *dev, struct device_attribute *attr, goto unlock_and_ret; } - ret = port->cap->port_type_set(port->cap, type); + ret = port->cap->port_type_set(port->orig_cap, type); if (ret) goto unlock_and_ret; @@ -1184,7 +1185,7 @@ static ssize_t vconn_source_store(struct device *dev, if (ret) return ret; - ret = port->cap->vconn_set(port->cap, (enum typec_role)source); + ret = port->cap->vconn_set(port->orig_cap, (enum typec_role)source); if (ret) return ret; @@ -1278,6 +1279,7 @@ static void typec_release(struct device *dev) ida_destroy(&port->mode_ids); typec_switch_put(port->sw); typec_mux_put(port->mux); + kfree(port->cap); kfree(port); } @@ -1579,9 +1581,10 @@ struct typec_port *typec_register_port(struct device *parent, mutex_init(&port->port_type_lock); port->id = id; - port->cap = cap; + port->orig_cap = cap; port->port_type = cap->type; port->prefer_role = cap->prefer_role; + port->cap = kmemdup(cap, sizeof(*cap), GFP_KERNEL); device_initialize(&port->dev); port->dev.class = typec_class;