Dave Jiang 1733310bb7 MPSC serial driver tx locking ... The MPSC serial driver assumes that interrupt is always on to pick up the DMA transmit ops that aren't submitted while the DMA engine is active. However when irqs are off for a period of time such as operations under kernel crash dump console messages do not show up due to additional DMA ops are being dropped. This makes console writes to process through all the tx DMAs queued up before submitting a new request. Also, the current locking mechanism does not protect the hardware registers and ring buffer when a printk is done during the serial write operations. The additional per port transmit lock provides a finer granular locking and protects registers being clobbered while printks are nested within UART writes. Signed-off-by: Dave Jiang <djiang@mvista.com> Signed-off-by: Mark A. Greer <mgreer@mvista.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2007-05-07 12:12:50 -07:00
..
acorn	[ARM] Acorn: move the i2c bus driver into drivers/i2c	2007-03-04 20:40:50 +00:00
acpi	Merge branch 'for-linus' of git://one.firstfloor.org/home/andi/git/linux-2.6	2007-05-05 14:55:20 -07:00
amba	uevent: use add_uevent_var() instead of open coding it	2007-04-27 10:57:29 -07:00
ata	Merge branch 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm	2007-05-06 13:20:10 -07:00
atm	PCI: Cleanup the includes of <linux/pci.h>	2007-05-02 19:02:35 -07:00
auxdisplay	[PATCH] cfag12864b: fix crash when built-in and no parport present	2007-02-20 17:10:14 -08:00
base	Merge master.kernel.org:/pub/scm/linux/kernel/git/gregkh/driver-2.6	2007-05-04 18:04:48 -07:00
block	[NET]: Rework dev_base via list_head (v3)	2007-05-03 15:13:45 -07:00
bluetooth	[SK_BUFF]: Introduce skb_copy_from_linear_data{_offset}	2007-04-25 22:28:23 -07:00
cdrom	[PATCH] Fix soft lockup with iSeries viocd driver	2007-03-05 07:57:51 -08:00
char	Merge branch 'for-linus' of git://one.firstfloor.org/home/andi/git/linux-2.6	2007-05-05 14:55:20 -07:00
clocksource	ACPI: correct pathname in comment	2007-04-25 14:27:06 -04:00
connector	[NETLINK]: Switch cb_lock spinlock to mutex and allow to override it	2007-04-25 22:29:03 -07:00
cpufreq	[CPUFREQ] cleanup kconfig options	2007-04-26 14:32:03 -04:00
crypto	[CRYPTO] padlock: Remove pointless padlock module	2007-05-02 22:08:26 +10:00
dio	…
dma	[PATCH] rm pointless dmaengine exports	2007-03-16 19:25:03 -07:00
edac	…
eisa	[PATCH] drivers/eisa/pci_eisa.c:pci_eisa_init() should be init	2007-03-27 09:05:15 -07:00
fc4	…
firmware	remove "struct subsystem" as it is no longer needed	2007-05-02 18:57:59 -07:00
hid	Merge branch 'for-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jikos/hid	2007-04-30 08:58:21 -07:00
hwmon	Merge branch 'linux-2.6' into for-2.6.22	2007-04-30 12:38:01 +10:00
i2c	Merge branch 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm	2007-05-06 13:20:10 -07:00
ide	ide-cs: recognize 2GB CompactFlash from Transcend	2007-05-05 22:03:51 +02:00
ieee1394	PCI: Cleanup the includes of <linux/pci.h>	2007-05-02 19:02:35 -07:00
infiniband	Merge master.kernel.org:/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6	2007-05-05 13:30:44 -07:00
input	Merge branch 'for-linus' of master.kernel.org:/pub/scm/linux/kernel/git/dtor/input	2007-05-04 18:16:12 -07:00
isdn	PCI: Cleanup the includes of <linux/pci.h>	2007-05-02 19:02:35 -07:00
kvm	KVM: Remove unused 'instruction_length'	2007-05-03 10:52:32 +03:00
leds	…
macintosh	CUDA ADB fixes	2007-05-04 17:59:07 -07:00
mca	…
md	[BLOCK] Don't pin lots of memory in mempools	2007-04-30 09:08:17 +02:00
media	Merge master.kernel.org:/pub/scm/linux/kernel/git/gregkh/pci-2.6	2007-05-04 18:04:29 -07:00
message	Merge master.kernel.org:/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6	2007-05-05 13:30:44 -07:00
mfd	[PATCH] drivers/mfd/sm501.c: fix an off-by-one	2007-04-02 10:06:08 -07:00
misc	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/drzeus/mmc	2007-05-04 21:44:34 -07:00
mmc	Merge branch 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm	2007-05-06 13:20:10 -07:00
mtd	Merge git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild	2007-05-06 13:21:57 -07:00
net	Merge git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild	2007-05-06 13:21:57 -07:00
nubus	…
oprofile	[PATCH] oprofile: fix potential deadlock on oprofilefs_lock	2007-03-28 13:58:02 -07:00
parisc	Merge master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6	2007-05-04 19:36:58 -07:00
parport	[PARPORT] SUNBPP: Fix OOPS when debugging is enabled.	2007-04-23 23:33:17 -07:00
pci	Merge master.kernel.org:/pub/scm/linux/kernel/git/gregkh/driver-2.6	2007-05-04 18:04:48 -07:00
pcmcia	add new_id to PCMCIA drivers	2007-05-07 12:12:50 -07:00
pnp	PNP: stop using the subsystem rwsem	2007-04-27 10:57:30 -07:00
ps3	ps3av: Use __func__ instead of __FUNCTION__	2007-05-04 17:59:09 -07:00
rapidio	…
rtc	[PATCH] rtc-cmos lockdep fix, irq updates	2007-04-02 10:06:09 -07:00
s390	Merge master.kernel.org:/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6	2007-05-05 13:30:44 -07:00
sbus	PCI: Cleanup the includes of <linux/pci.h>	2007-05-02 19:02:35 -07:00
scsi	Merge git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild	2007-05-06 13:21:57 -07:00
serial	MPSC serial driver tx locking	2007-05-07 12:12:50 -07:00
sh	…
sn	…
spi	spi: fix use of set_cs in spi_s3c24xx driver	2007-04-17 16:36:27 -07:00
tc	[PATCH] Fix build error on zs serial driver	2007-04-04 21:12:47 -07:00
telephony	…
usb	Merge branch 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm	2007-05-06 13:20:10 -07:00
video	Merge git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild	2007-05-06 13:21:57 -07:00
w1	…
zorro	Amiga Zorro bus: kill resource_size_t warnings	2007-05-04 17:59:08 -07:00
Kconfig	…
Makefile	i2c: Add i2c_board_info and i2c_new_device()	2007-05-01 23:26:31 +02:00