linux-kernel - [PATCH] ehci: Disable wake on overcurrent (WKOC

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: <201004271622.55904.linux@rainbow-software.org>
Date:	Tue, 27 Apr 2010 16:22:53 +0200
From:	Ondrej Zary <linux@...nbow-software.org>
To:	linux-pm@...ts.linux-foundation.org
Cc:	linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] ehci: Disable wake on overcurrent (WKOC_E)

Disable wake on overcurrent in EHCI.
This fixes immediate resume from standby on boards where port power is lost
in standby which triggers overcurrent detection. At least Asus P4P800 boards
are affected when any of the USBPWxx (e.g. USBPW12) jumpers is set to 5V.
Tested on Asus P4P800-VM.

Signed-off-by: Ondrej Zary <linux@...nbow-software.org>

--- linux-source-2.6.33-orig/drivers/usb/host/ehci-hub.c	2010-02-24 19:52:17.000000000 +0100
+++ linux-source-2.6.33/drivers/usb/host/ehci-hub.c	2010-04-27 16:04:37.000000000 +0200
@@ -180,10 +180,10 @@ static int ehci_bus_suspend (struct usb_
 			 * set), the port change detection will finally fix it.
 			 */
 			if (t1 & PORT_CONNECT) {
-				t2 |= PORT_WKOC_E | PORT_WKDISC_E;
+				t2 |= PORT_WKDISC_E;
 				t2 &= ~PORT_WKCONN_E;
 			} else {
-				t2 |= PORT_WKOC_E | PORT_WKCONN_E;
+				t2 |= PORT_WKCONN_E;
 				t2 &= ~PORT_WKDISC_E;
 			}
 		} else
@@ -912,7 +912,7 @@ static int ehci_hub_control (
 			 * mode if we have hostpc feature
 			 */
 			temp &= ~PORT_WKCONN_E;
-			temp |= PORT_WKDISC_E | PORT_WKOC_E;
+			temp |= PORT_WKDISC_E;
 			ehci_writel(ehci, temp | PORT_SUSPEND, status_reg);
 			if (hostpc_reg) {
 				spin_unlock_irqrestore(&ehci->lock, flags);


-- 
Ondrej Zary
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/