Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754729AbdDJPsu (ORCPT ); Mon, 10 Apr 2017 11:48:50 -0400 Received: from mx2.suse.de ([195.135.220.15]:38061 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754512AbdDJPei (ORCPT ); Mon, 10 Apr 2017 11:34:38 -0400 X-Amavis-Alert: BAD HEADER SECTION, Duplicate header field: "References" From: Jiri Slaby To: stable@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Oliver Neukum , Jiri Slaby Subject: [PATCH 3.12 083/142] ACM gadget: fix endianness in notifications Date: Mon, 10 Apr 2017 17:32:44 +0200 Message-Id: <1fe96ca018e25a99c4b2fc84acc6e95b53668f70.1491838390.git.jslaby@suse.cz> X-Mailer: git-send-email 2.12.2 In-Reply-To: References: In-Reply-To: References: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1370 Lines: 42 From: Oliver Neukum 3.12-stable review patch. If anyone has any objections, please let me know. =============== commit cdd7928df0d2efaa3270d711963773a08a4cc8ab upstream. The gadget code exports the bitfield for serial status changes over the wire in its internal endianness. The fix is to convert to little endian before sending it over the wire. Signed-off-by: Oliver Neukum Tested-by: 家瑋 Signed-off-by: Jiri Slaby --- drivers/usb/gadget/f_acm.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/usb/gadget/f_acm.c b/drivers/usb/gadget/f_acm.c index 3384486c2884..ff30171b6926 100644 --- a/drivers/usb/gadget/f_acm.c +++ b/drivers/usb/gadget/f_acm.c @@ -535,13 +535,15 @@ static int acm_notify_serial_state(struct f_acm *acm) { struct usb_composite_dev *cdev = acm->port.func.config->cdev; int status; + __le16 serial_state; spin_lock(&acm->lock); if (acm->notify_req) { DBG(cdev, "acm ttyGS%d serial state %04x\n", acm->port_num, acm->serial_state); + serial_state = cpu_to_le16(acm->serial_state); status = acm_cdc_notify(acm, USB_CDC_NOTIFY_SERIAL_STATE, - 0, &acm->serial_state, sizeof(acm->serial_state)); + 0, &serial_state, sizeof(acm->serial_state)); } else { acm->pending = true; status = 0; -- 2.12.2