linux-kernel - [rfc patch] Re: [patch] PM: suspend/resume debugging should depend on SOFTWARE

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: <1164796231.6147.12.camel@Homer.simpson.net>
Date:	Wed, 29 Nov 2006 11:30:31 +0100
From:	Mike Galbraith <efault@....de>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	Linus Torvalds <torvalds@...l.org>, Pavel Machek <pavel@...e.cz>,
	Chuck Ebbert <76306.1226@...puserve.com>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...l.org>
Subject: [rfc patch] Re: [patch] PM: suspend/resume debugging should depend
	on SOFTWARE_SUSPEND

On Wed, 2006-11-29 at 11:21 +0100, Mike Galbraith wrote:
> > The serial console appears to be innocent.  The suspend/resume methods
> > for my 16550A serial port aren't even being _called_, apparently because
> > pnp swiped ttyS0.

(ahem, bad aim with mouse, resuming)

Well, after further rummaging, the suspend/resume methods aren't being
called because we're using 8250_pnp.c when CONFIG_PNP is set, and it
doesn't have any :)  The below works for me, though I'm not sure it's
sufficient.  If it is deemed sufficient, I'll submit it to Andrew.

Add suspend/resume methods to 8250_pnp driver.

--- linux-2.6.19-rc6-mm2/drivers/serial/8250_pnp.c.org	2006-11-29 07:14:15.000000000 +0100
+++ linux-2.6.19-rc6-mm2/drivers/serial/8250_pnp.c	2006-11-29 10:55:17.000000000 +0100
@@ -464,11 +464,38 @@ static void __devexit serial_pnp_remove(
 		serial8250_unregister_port(line - 1);
 }
 
+#ifdef CONFIG_PM
+static int serial_pnp_suspend(struct pnp_dev *dev, pm_message_t state)
+{
+	long line = (long)pnp_get_drvdata(dev);
+
+	if (!line)
+		return -ENODEV;
+	serial8250_suspend_port(line - 1);
+	return 0;
+}
+
+static int serial_pnp_resume(struct pnp_dev *dev)
+{
+	long line = (long)pnp_get_drvdata(dev);
+
+	if (!line)
+		return -ENODEV;
+	serial8250_resume_port(line - 1);
+	return 0;
+}
+
+#endif /* CONFIG_PM */
+
 static struct pnp_driver serial_pnp_driver = {
 	.name		= "serial",
-	.id_table	= pnp_dev_table,
 	.probe		= serial_pnp_probe,
 	.remove		= __devexit_p(serial_pnp_remove),
+#ifdef CONFIG_PM
+	.suspend	= serial_pnp_suspend,
+	.resume		= serial_pnp_resume,
+#endif
+	.id_table	= pnp_dev_table,
 };
 
 static int __init serial8250_pnp_init(void)





-
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/