linux-kernel - [PATCH 29/36] usb: serial: ti_usb_3410_5052: Set shadow msr before waking up waiters

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <1463042948-12205-30-git-send-email-m.othacehe@gmail.com>
Date:	Thu, 12 May 2016 10:49:01 +0200
From:	Mathieu OTHACEHE <m.othacehe@...il.com>
To:	johan@...nel.org
Cc:	gregkh@...uxfoundation.org, linux-usb@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Mathieu OTHACEHE <m.othacehe@...il.com>
Subject: [PATCH 29/36] usb: serial: ti_usb_3410_5052: Set shadow msr before waking up waiters

Save msr before testing the delta and waking up any waiters.
Also use port directly instead of tport->tp_port.

Signed-off-by: Mathieu OTHACEHE <m.othacehe@...il.com>
---
 drivers/usb/serial/ti_usb_3410_5052.c | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/drivers/usb/serial/ti_usb_3410_5052.c b/drivers/usb/serial/ti_usb_3410_5052.c
index 72cb675..1d8d8ef 100644
--- a/drivers/usb/serial/ti_usb_3410_5052.c
+++ b/drivers/usb/serial/ti_usb_3410_5052.c
@@ -1240,9 +1240,12 @@ static void ti_handle_new_msr(struct usb_serial_port *port, u8 msr)
 
 	dev_dbg(&port->dev, "%s - msr 0x%02X\n", __func__, msr);
 
+	spin_lock_irqsave(&tport->tp_lock, flags);
+	tport->tp_msr = msr & TI_MSR_MASK;
+	spin_unlock_irqrestore(&tport->tp_lock, flags);
+
 	if (msr & TI_MSR_DELTA_MASK) {
-		spin_lock_irqsave(&tport->tp_lock, flags);
-		icount = &tport->tp_port->icount;
+		icount = &port->icount;
 		if (msr & TI_MSR_DELTA_CTS)
 			icount->cts++;
 		if (msr & TI_MSR_DELTA_DSR)
@@ -1251,11 +1254,9 @@ static void ti_handle_new_msr(struct usb_serial_port *port, u8 msr)
 			icount->dcd++;
 		if (msr & TI_MSR_DELTA_RI)
 			icount->rng++;
+
 		wake_up_interruptible(&port->port.delta_msr_wait);
-		spin_unlock_irqrestore(&tport->tp_lock, flags);
 	}
-
-	tport->tp_msr = msr & TI_MSR_MASK;
 }
 
 static int ti_do_download(struct usb_serial *serial,
-- 
2.8.2