From 7a192ec334cab9fafe3a8665a65af398b0e24730 Mon Sep 17 00:00:00 2001 From: Ming Lei Date: Fri, 6 Feb 2009 23:40:12 +0800 Subject: platform driver: fix incorrect use of 'platform_bus_type' with 'struct device_driver' This patch fixes the bug reported in http://bugzilla.kernel.org/show_bug.cgi?id=11681. "Lots of device drivers register a 'struct device_driver' with the '.bus' member set to '&platform_bus_type'. This is wrong, since the platform_bus functions expect the 'struct device_driver' to be wrapped up in a 'struct platform_driver' which provides some additional callbacks (like suspend_late, resume_early). The effect may be that platform_suspend_late() uses bogus data outside the device_driver struct as a pointer pointer to the device driver's suspend_late() function or other hard to reproduce failures."(Lothar Wassmann) Signed-off-by: Ming Lei Acked-by: Henrique de Moraes Holschuh Acked-by: David Brownell Signed-off-by: Greg Kroah-Hartman --- drivers/char/tpm/tpm_atmel.c | 28 +++++++++++++++++++--------- 1 file changed, 19 insertions(+), 9 deletions(-) (limited to 'drivers/char/tpm/tpm_atmel.c') diff --git a/drivers/char/tpm/tpm_atmel.c b/drivers/char/tpm/tpm_atmel.c index d0e7926eb48..c64a1bc6534 100644 --- a/drivers/char/tpm/tpm_atmel.c +++ b/drivers/char/tpm/tpm_atmel.c @@ -168,12 +168,22 @@ static void atml_plat_remove(void) } } -static struct device_driver atml_drv = { - .name = "tpm_atmel", - .bus = &platform_bus_type, - .owner = THIS_MODULE, - .suspend = tpm_pm_suspend, - .resume = tpm_pm_resume, +static int tpm_atml_suspend(struct platform_device *dev, pm_message_t msg) +{ + return tpm_pm_suspend(&dev->dev, msg); +} + +static int tpm_atml_resume(struct platform_device *dev) +{ + return tpm_pm_resume(&dev->dev); +} +static struct platform_driver atml_drv = { + .driver = { + .name = "tpm_atmel", + .owner = THIS_MODULE, + }, + .suspend = tpm_atml_suspend, + .resume = tpm_atml_resume, }; static int __init init_atmel(void) @@ -184,7 +194,7 @@ static int __init init_atmel(void) unsigned long base; struct tpm_chip *chip; - rc = driver_register(&atml_drv); + rc = platform_driver_register(&atml_drv); if (rc) return rc; @@ -223,13 +233,13 @@ err_rel_reg: atmel_release_region(base, region_size); err_unreg_drv: - driver_unregister(&atml_drv); + platform_driver_unregister(&atml_drv); return rc; } static void __exit cleanup_atmel(void) { - driver_unregister(&atml_drv); + platform_driver_unregister(&atml_drv); atml_plat_remove(); } -- cgit v1.2.3-70-g09d2