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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
..
accessibility
acorn/char
acpi x86 ACPI: normalize segment descriptor register on resume 2008-07-05 08:25:40 +02:00
amba
ata libata-acpi: don't call sleeping function from invalid context 2008-07-11 09:42:03 -04:00
atm atm: [he] send idle cells instead of unassigned when in SDH mode 2008-06-16 17:21:27 -07:00
auxdisplay Miguel Ojeda has moved 2008-07-04 10:40:05 -07:00
base mm: switch node meminfo Active & Inactive pages to Kbytes 2008-07-04 10:40:09 -07:00
block cciss: read config to obtain max outstanding commands per controller 2008-07-04 10:40:09 -07:00
bluetooth
cdrom [POWERPC] iSeries: Remove unused mail address 2008-05-23 16:45:04 +10:00
char drivers/char/pcmcia/ipwireless/hardware.c fix resource leak 2008-07-12 14:33:41 -07:00
clocksource
connector CONNECTOR: add a proc entry to list connectors 2008-06-27 20:03:24 -07:00
cpufreq Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq 2008-06-09 11:27:55 -07:00
cpuidle cpuidle acpi driver: fix oops on AC<->DC 2008-06-11 19:13:45 -04:00
crypto
dca
dio
dma
edac edac: mpc85xx: fix building as a module 2008-05-24 09:56:13 -07:00
eisa
firewire firewire: fw-sbp2: fix parsing of logical unit directories 2008-06-27 20:55:00 +02:00
firmware edd: fix incorrect return of 1 from module_init 2008-06-06 11:29:09 -07:00
gpio gpio: pca953x (i2c) handles max7310 too 2008-07-04 10:40:06 -07:00
hid
hwmon hdaps: add support for various newer Lenovo thinkpads 2008-07-04 10:40:06 -07:00
i2c I2C: S3C2410: Add MODULE_ALIAS() for s3c2440 device. 2008-07-01 14:30:38 +01:00
ide it8213: fix return value in it8213_init_one() 2008-07-08 19:27:23 +02:00
ieee1394 ieee1394: Kconfig menu touch-up 2008-06-19 00:12:36 +02:00
infiniband RDMA/cxgb3: Fix regression caused by class_device -> device conversion 2008-07-08 14:40:05 -07:00
input drivers/input/ff-core.c needs <linux/sched.h> 2008-07-02 18:40:08 -07:00
isdn drivers/isdn/i4l/isdn_common.c fix small resource leak 2008-07-12 14:33:41 -07:00
leds
lguest x86: fix NULL pointer deref in __switch_to 2008-06-20 13:26:18 +02:00
macintosh [POWERPC] Build fix for drivers/macintosh/mediabay.c 2008-06-16 15:00:47 +10:00
mca
md Merge branch 'for-2.6.26' of git://neil.brown.name/md 2008-07-10 09:49:46 -07:00
media ov7670: clean up ov7670_read semantics 2008-07-12 14:33:41 -07:00
memstick
message [SCSI] fusion: default MSI to disabled for SPI and FC controllers 2008-07-12 08:18:11 -05:00
mfd HTC_EGPIO is ARM-only 2008-05-21 16:56:00 -07:00
misc thinkpad-acpi: fix LED handling on older ThinkPads 2008-06-11 19:13:45 -04:00
mmc pxamci: fix byte aligned DMA transfers 2008-07-06 10:37:40 -07:00
mtd Merge git://git.infradead.org/~dwmw2/mtd-2.6.26 2008-06-06 11:31:18 -07:00
net tun: Persistent devices can get stuck in xoff state 2008-07-10 16:59:11 -07:00
nubus
of rtc-ds1374: rename device to just "ds1374" 2008-06-06 11:29:10 -07:00
oprofile
parisc
parport
pci pci: VT3336 can't do MSI either 2008-07-04 10:40:05 -07:00
pcmcia electra_cf: Add MODULE_DEVICE_TABLE() 2008-05-27 16:07:45 -05:00
pnp PNPACPI: use _CRS IRQ descriptor length for _SRS 2008-06-11 19:13:46 -04:00
power power_supply: Fix race in power_supply_uevent 2008-06-10 02:13:51 +04:00
ps3
rapidio rapidio: fix device reference counting 2008-07-10 18:04:43 -07:00
rtc rtc-pcf8563: add chip id 2008-07-12 14:33:42 -07:00
s390 [S390] sclp_tty: Fix scheduling while atomic bug. 2008-07-14 10:02:25 +02:00
sbus sbus bpp: instances missed in s/dev_name/bpp_dev_name/ 2008-05-21 16:55:59 -07:00
scsi [SCSI] ipr: Fix HDIO_GET_IDENTITY oops for SATA devices 2008-07-11 13:45:48 -05:00
serial serial8250: sanity check nr_uarts on all paths. 2008-07-12 14:33:41 -07:00
sh
sn
spi spi: fix the read path in spidev 2008-07-04 10:40:08 -07:00
ssb ssb-pcicore: Fix IRQ-vector init on embedded devices 2008-07-07 15:31:40 -04:00
tc
telephony
thermal thermal: Create CONFIG_THERMAL_HWMON=n 2008-06-25 19:25:42 -04:00
uio
usb Fix name of Russell King in various comments 2008-07-10 18:04:43 -07:00
video fbdev: bugfix for multiprocess defio 2008-07-12 14:33:41 -07:00
virtio virtio: Complete feature negotation before updating status 2008-06-15 13:46:16 -07:00
w1
watchdog Revert "[WATCHDOG] hpwdt: Add CFLAGS to get driver working" 2008-06-24 13:09:26 +00:00
xen xen: Use wmb instead of rmb in xen_evtchn_do_upcall(). 2008-06-20 14:56:30 +02:00
zorro
Kconfig
Makefile