Commit 65909814 authored Jul 29, 2009 by Thadeu Lima de Souza Cascardo Committed by Linus Torvalds Jul 29, 2009

rtc: mark if rtc-cmos drivers were successfully registered



rtc-cmos has two drivers, one PNP and one platform.  When PNP has not
succeeded probing, platform is registered.  However, it tries to
unregister both drivers unconditionally, instead of only unregistering
those that were successfully registered.  This causes runtime warnings to
be emitted from the driver core code.

Fix this with a boolean variable for each driver indicating whether
registering was successful.

Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@holoscopio.com>
Cc: David Brownell <david-b@pacbell.net>
Cc: Bjorn Helgaas <bjorn.helgaas@hp.com>
Cc: Alessandro Zummo <alessandro.zummo@towertech.it>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: David Brownell <david-b@pacbell.net>
Cc: Kay Sievers <kay.sievers@vrfy.org>
Cc: Greg KH <greg@kroah.com>
Cc: Ozan Caglayan <ozan@pardus.org.tr>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent 57c5c28d

drivers/rtc/rtc-cmos.c

+18 −5

Original line number	Diff line number	Diff line
		@@ -1174,22 +1174,33 @@ static struct platform_driver cmos_platform_driver = {
		}
		};

		#ifdef CONFIG_PNP
		static bool pnp_driver_registered;
		#endif
		static bool platform_driver_registered;

		static int __init cmos_init(void)
		{
		int retval = 0;

		#ifdef CONFIG_PNP
		pnp_register_driver(&cmos_pnp_driver);
		retval = pnp_register_driver(&cmos_pnp_driver);
		if (retval == 0)
		pnp_driver_registered = true;
		#endif

		if (!cmos_rtc.dev)
		if (!cmos_rtc.dev) {
		retval = platform_driver_probe(&cmos_platform_driver,
		cmos_platform_probe);
		if (retval == 0)
		platform_driver_registered = true;
		}

		if (retval == 0)
		return 0;

		#ifdef CONFIG_PNP
		if (pnp_driver_registered)
		pnp_unregister_driver(&cmos_pnp_driver);
		#endif
		return retval;
		@@ -1199,8 +1210,10 @@ module_init(cmos_init);
		static void __exit cmos_exit(void)
		{
		#ifdef CONFIG_PNP
		if (pnp_driver_registered)
		pnp_unregister_driver(&cmos_pnp_driver);
		#endif
		if (platform_driver_registered)
		platform_driver_unregister(&cmos_platform_driver);
		}
		module_exit(cmos_exit);