From 1e5320960510d6d6f2cbdc7ed33df9791283b7ea Mon Sep 17 00:00:00 2001 From: Sebastian Ott Date: Mon, 27 Jan 2014 13:28:10 +0100 Subject: s390/cio: reorder initialization of ccw consoles Drivers for ccw consoles use ccw_device_probe_console to receive an initialized ccw device which is already enabled for interrupts. After that the device driver does the initialization of its private data. This can race with unsolicited interrupts which can happen once the device is enabled for interrupts. Split ccw_device_probe_console into ccw_device_create_console and ccw_device_enable_console and reorder the initialization of the ccw console drivers. While at it mark these functions as __init. Reviewed-by: Peter Oberparleiter Signed-off-by: Sebastian Ott Signed-off-by: Martin Schwidefsky --- drivers/s390/char/con3215.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) (limited to 'drivers/s390/char/con3215.c') diff --git a/drivers/s390/char/con3215.c b/drivers/s390/char/con3215.c index bb86494e2b7b..5af7f0bd6125 100644 --- a/drivers/s390/char/con3215.c +++ b/drivers/s390/char/con3215.c @@ -922,7 +922,7 @@ static int __init con3215_init(void) raw3215_freelist = req; } - cdev = ccw_device_probe_console(&raw3215_ccw_driver); + cdev = ccw_device_create_console(&raw3215_ccw_driver); if (IS_ERR(cdev)) return -ENODEV; @@ -932,6 +932,12 @@ static int __init con3215_init(void) cdev->handler = raw3215_irq; raw->flags |= RAW3215_FIXED; + if (ccw_device_enable_console(cdev)) { + ccw_device_destroy_console(cdev); + raw3215_free_info(raw); + raw3215[0] = NULL; + return -ENODEV; + } /* Request the console irq */ if (raw3215_startup(raw) != 0) { -- cgit v1.2.3