Heiko Carstens 5e34599fc8 [S390] sclp_tty: Fix scheduling while atomic bug. ... Finally fixes a possible scheduling while in atomic context bug. The driver used to wait on a waitqueue if no empty buffer was available. This could lead to a deadlock if the driver was called from non-schedulable context. So fix this. The write operation may fail now. It returns the number of characters accepted. put_char will never fail, since it writes characters to an intermediate buffer which gets flushed as soon as it is full. That means the driver now can busy wait if something is in the intermediate buffer and a write_string operation follows. Seems to be an acceptable compromise, since that shouldn't happen too often. Cc: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>		2008-07-14 10:02:25 +02:00
..
con3215.c	[S390] Remove P390 support.	2008-07-14 10:02:25 +02:00
con3270.c	[S390] cio: introduce fcx enabled scsw format	2008-07-14 10:02:07 +02:00
ctrlchar.c	[S390] workqueue fixes.	2006-12-08 15:53:52 +01:00
ctrlchar.h
defkeymap.c	Build fix for drivers/s390/char/defkeymap.c	2008-03-04 08:01:26 -08:00
defkeymap.map
fs3270.c	[S390] Cleanup 3270 printk messages.	2008-07-14 10:02:18 +02:00
Kconfig	[S390] sclp: kill unused SCLP config option.	2007-07-27 12:29:18 +02:00
keyboard.c	unicode diacritics support	2007-10-17 08:42:52 -07:00
keyboard.h	unicode diacritics support	2007-10-17 08:42:52 -07:00
Makefile	[S390] sclp: convert channel path configure code to use sync interface.	2008-01-26 14:11:10 +01:00
monreader.c	[S390] Cleanup monreader printk messages.	2008-07-14 10:02:22 +02:00
monwriter.c	[S390] drivers/s390: Add missing "space"	2008-01-26 14:11:19 +01:00
raw3270.c	[S390] Cleanup 3270 printk messages.	2008-07-14 10:02:18 +02:00
raw3270.h	[S390] Fix sparse warnings.	2006-07-12 16:41:55 +02:00
sclp_cmd.c	[S390] Move memory detection code to own file.	2008-07-14 10:02:17 +02:00
sclp_con.c	[S390] sclp_tty: remove ioctl interface.	2008-07-14 10:02:25 +02:00
sclp_config.c	[S390] Cleanup sclp printk messages.	2008-07-14 10:02:19 +02:00
sclp_cpi_sys.c	[S390] Cleanup sclp printk messages.	2008-07-14 10:02:19 +02:00
sclp_cpi_sys.h	[S390] sclp: sysfs interface for SCLP cpi	2008-01-26 14:11:08 +01:00
sclp_cpi.c	[S390] sclp: sysfs interface for SCLP cpi	2008-01-26 14:11:08 +01:00
sclp_quiesce.c	[S390] Cleanup sclp printk messages.	2008-07-14 10:02:19 +02:00
sclp_rw.c	[S390] Cleanup sclp printk messages.	2008-07-14 10:02:19 +02:00
sclp_rw.h
sclp_sdias.c	[S390] Cleanup sclp printk messages.	2008-07-14 10:02:19 +02:00
sclp_tty.c	[S390] sclp_tty: Fix scheduling while atomic bug.	2008-07-14 10:02:25 +02:00
sclp_tty.h	[S390] sclp_tty: remove ioctl interface.	2008-07-14 10:02:25 +02:00
sclp_vt220.c	[S390] Cleanup sclp printk messages.	2008-07-14 10:02:19 +02:00
sclp.c	[S390] Remove P390 support.	2008-07-14 10:02:25 +02:00
sclp.h	[S390] sclp: clean up send/receive naming scheme	2008-02-19 15:29:34 +01:00
tape_34xx.c	[S390] cio: introduce fcx enabled scsw format	2008-07-14 10:02:07 +02:00
tape_3590.c	[S390] cio: introduce fcx enabled scsw format	2008-07-14 10:02:07 +02:00
tape_3590.h	[S390] tape: New read configuration data.	2007-05-04 18:48:26 +02:00
tape_block.c	[S390] tape: Fix race condition in tape block device driver	2008-05-30 10:03:33 +02:00
tape_char.c	[S390] tape: duplicate sysfs filename when setting tape device online	2008-04-17 07:46:59 +02:00
tape_class.c	[S390] tape: duplicate sysfs filename when setting tape device online	2008-04-17 07:46:59 +02:00
tape_class.h	[S390] tape: duplicate sysfs filename when setting tape device online	2008-04-17 07:46:59 +02:00
tape_core.c	[S390] cio: introduce fcx enabled scsw format	2008-07-14 10:02:07 +02:00
tape_proc.c	s390: use non-racy method for proc entries creation	2008-04-29 08:06:21 -07:00
tape_std.c	[S390] tape: Compression overwrites crypto setting	2007-03-05 23:35:47 +01:00
tape_std.h	[PATCH] s390: tape 3590 changes	2006-04-28 08:33:48 -07:00
tape.h	[S390] tape: fix race with stack local wait_queue_head_t.	2008-05-30 10:03:36 +02:00
tty3270.c	[S390] Cleanup 3270 printk messages.	2008-07-14 10:02:18 +02:00
tty3270.h	[S390] Get rid of a bunch of sparse warnings again.	2007-10-12 16:13:06 +02:00
vmcp.c	[S390] Cleanup vmcp printk messages.	2008-07-14 10:02:24 +02:00
vmcp.h	[S390] vmcp cleanup	2007-07-17 13:36:19 +02:00
vmlogrdr.c	[S390] Cleanup vmlogrdr printk messages.	2008-07-14 10:02:22 +02:00
vmur.c	[S390] cio: introduce fcx enabled scsw format	2008-07-14 10:02:07 +02:00
vmur.h	[S390] vmur: Use wait queue instead of mutex to serialize open	2008-04-17 07:46:59 +02:00
vmwatchdog.c	[S390] Cleanup vmwatch printk messages.	2008-07-14 10:02:23 +02:00
zcore.c	[S390] Cleanup zfcp dumper printk messages.	2008-07-14 10:02:23 +02:00