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Peter Hurley 7c8ab967e3 serial: Fix locking for uart driver set_termios() method
The low-level uart driver may modify termios settings to override
settings that are not compatible with the uart, such as CRTSCTS.
Thus, callers of the low-level uart driver's set_termios() method must
hold termios_rwsem write lock to prevent concurrent access to termios,
in case such override occurs.

The termios_rwsem lock requirement does not extend to console setup
(ie., uart_set_options), as console setup cannot race with tty
operations. Nor does this lock requirement extend to functions which
cannot be concurrent with tty ioctls (ie., uart_port_startup() and
uart_resume_port()).

Further, always claim the port mutex to protect hardware
re-reprogramming in the set_termios() uart driver method. Note this
is unnecessary for console initialization in uart_set_options()
which cannot be concurrent with other uart operations.

Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-11-05 18:53:54 -08:00
..
ABI Documentation/ABI/testing/sysfs-ibft: fix a typo 2014-10-21 10:31:26 -04:00
DocBook Merge tag 'docs-for-linus' of git://git.lwn.net/linux-2.6 2014-10-31 11:55:40 -07:00
EDID
PCI
RCU documentation: Add verbiage on RCU-tasks stall warning messages 2014-09-07 16:27:28 -07:00
accounting Documentation: use subdir-y to avoid unnecessary built-in.o files 2014-09-26 11:02:55 +02:00
acpi mfd: Add ACPI support 2014-09-26 08:24:05 +01:00
aoe
arm ARM: SoC DT updates for 3.18 2014-10-08 17:22:23 -04:00
arm64 Documentation/arm64/memory.txt: fix typo 2014-10-20 17:55:38 +01:00
auxdisplay Documentation: use subdir-y to avoid unnecessary built-in.o files 2014-09-26 11:02:55 +02:00
backlight
blackfin Documentation: add makefiles for more targets 2014-09-26 11:02:56 +02:00
block Merge branch 'for-3.18/core' of git://git.kernel.dk/linux-block 2014-10-18 11:53:51 -07:00
blockdev zram: report maximum used memory 2014-10-09 22:26:02 -04:00
bus-devices
cdrom
cgroups cpuset: PF_SPREAD_PAGE and PF_SPREAD_SLAB should be atomic flags 2014-09-24 22:16:06 -04:00
connector
console
cpu-freq intel_pstate: Update documentation of {max,min}_perf_pct sysfs files 2014-07-07 01:22:19 +02:00
cpuidle
cris
crypto
development-process Documentation: remove outdated references to the linux-next wiki 2014-10-28 09:06:11 -04:00
device-mapper dm switch: efficiently support repetitive patterns 2014-08-01 12:30:37 -04:00
devicetree Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2014-10-31 15:04:58 -07:00
driver-model PCI changes for the v3.18 merge window: 2014-10-09 15:03:49 -04:00
dvb [media] get_dvb_firmware: Update firmware of ITEtech IT9135 2014-09-21 17:03:04 -03:00
early-userspace
extcon
fault-injection
fb
filesystems overlay: overlay filesystem documentation 2014-10-24 00:14:39 +02:00
firmware_class doc: fix minor typos in firmware_class README 2014-07-17 18:43:40 -07:00
fmc
frv
gpio This is the bulk of GPIO changes for the v3.18 development 2014-10-09 14:58:15 -04:00
hid HID: uhid: update documentation 2014-08-25 03:28:09 -05:00
hwmon Immutable branch between MFD, HWMON, LEDs and Watchdog for v3.18 2014-09-24 09:25:06 -07:00
i2c i2c: i801: Add Device IDs for Intel Sunrise Point PCH 2014-10-16 09:16:22 +02:00
i2o
ia64 Documentation: use subdir-y to avoid unnecessary built-in.o files 2014-09-26 11:02:55 +02:00
ide
infiniband IB/mad: add new ioctl to ABI to support new registration options 2014-08-10 20:36:00 -07:00
input Merge branch 'next' into for-linus 2014-08-06 23:36:12 -07:00
ioctl cxl: Add documentation for userspace APIs 2014-10-08 20:16:19 +11:00
isdn
ja_JP
kbuild Documentation: kbuild: Improve grammar 2014-08-19 10:02:56 +02:00
kdump Documentation/kdump/kdump.txt: add ARM description 2014-08-29 16:28:17 -07:00
ko_KR
laptops Documentation: update .gitignore files 2014-09-26 11:02:59 +02:00
leds
locking Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-10-13 15:51:40 +02:00
m68k
memory-devices
metag
mic Documentation: update include path for mpssd 2014-10-03 15:48:20 +02:00
mips Documentation: au1xxx-ide.c has moved 2014-08-26 09:35:53 +02:00
misc-devices Documentation: use subdir-y to avoid unnecessary built-in.o files 2014-09-26 11:02:55 +02:00
mmc
mn10300
mtd
namespaces
netlabel
networking Documentation: replace __sk_run_filter with __bpf_prog_run 2014-10-10 15:10:50 -04:00
nfc
parisc
pcmcia Documentation: use subdir-y to avoid unnecessary built-in.o files 2014-09-26 11:02:55 +02:00
phy
platform
power Merge branch 'pm-qos' 2014-10-23 23:02:36 +02:00
powerpc cxl: Add documentation for userspace APIs 2014-10-08 20:16:19 +11:00
pps
prctl Documentation: Restrict TSC test code to x86 2014-10-28 08:46:27 -04:00
pti
ptp ptp: restore the makefile for building the test program. 2014-10-24 16:07:10 -04:00
rapidio rapidio/tsi721_dma: rework scatter-gather list handling 2014-08-08 15:57:24 -07:00
s390
scheduler Documentation/scheduler/sched-deadline.txt: Add minimal main() appendix 2014-09-16 10:23:45 +02:00
scsi Merge branch 'for-linus' of git://git.open-osd.org/linux-open-osd 2014-10-21 12:53:45 -07:00
security Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security 2014-10-12 10:13:55 -04:00
serial serial: Fix locking for uart driver set_termios() method 2014-11-05 18:53:54 -08:00
sh
sound ALSA: virtuoso: add Xonar Essence STX II support 2014-08-04 15:20:48 +02:00
spi Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/doc 2014-10-07 21:14:57 -04:00
sysctl coredump: add %i/%I in core_pattern to report the tid of the crashed thread 2014-10-14 02:18:21 +02:00
target target: Add documentation on the target userspace pass-through driver 2014-10-02 21:35:54 -07:00
thermal
timers Documentation: update .gitignore files 2014-09-26 11:02:59 +02:00
tpm
trace mm: trace-vmscan-postprocess.pl: report the number of file/anon pages respectively 2014-08-06 18:01:20 -07:00
usb usb: hub: rename khubd to hub_wq in documentation and comments 2014-09-23 22:33:19 -07:00
vDSO vdso: don't require 64-bit math in standalone test 2014-10-25 10:53:44 -04:00
video4linux media updates for v3.18-rc1 2014-10-10 22:04:49 -04:00
virtual Changes for KVM for arm/arm64 for 3.18 2014-09-27 11:03:33 +02:00
vm Docs: Document that the sticky bit is understood by hugetlbfs 2014-10-22 14:26:04 -04:00
w1
watchdog Documentation: use subdir-y to avoid unnecessary built-in.o files 2014-09-26 11:02:55 +02:00
wimax
x86 x86/mm: Update memory map description to list hypervisor-reserved area 2014-09-19 12:48:02 +02:00
xtensa
zh_CN Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2014-08-06 21:03:53 -07:00
00-INDEX locking/Documentation: Move locking related docs into Documentation/locking/ 2014-08-13 10:32:03 +02:00
BUG-HUNTING
Changes Documentation: remove obsolete pcmcia-cs from Changes 2014-09-09 10:35:58 +02:00
CodingStyle CodingStyle: fix a minor typo 2014-08-26 09:35:54 +02:00
DMA-API-HOWTO.txt Documentation: correct parameter error for dma_mapping_error 2014-09-26 11:22:29 +02:00
DMA-API.txt
DMA-ISA-LPC.txt
DMA-attributes.txt
HOWTO Documentation: remove outdated references to the linux-next wiki 2014-10-28 09:06:11 -04:00
IPMI.txt
IRQ-affinity.txt
IRQ-domain.txt
IRQ.txt
Intel-IOMMU.txt
Makefile Documentation: add makefiles for more targets 2014-09-26 11:02:56 +02:00
ManagementStyle
SAK.txt
SM501.txt
SecurityBugs
SubmitChecklist
SubmittingDrivers
SubmittingPatches Documentation/SubmittingPatches: Reported-by tags and permission 2014-10-29 08:56:46 -04:00
VGA-softcursor.txt
applying-patches.txt Documentation: change "&" to "and" in Documentation/applying-patches.txt 2014-09-26 11:10:11 +02:00
assoc_array.txt
atomic_ops.txt
bad_memory.txt
basic_profiling.txt
bcache.txt
binfmt_misc.txt binfmt_misc: touch up documentation a bit 2014-10-14 02:18:16 +02:00
braille-console.txt
bt8xxgpio.txt
btmrvl.txt
bus-virt-phys-mapping.txt
cachetlb.txt
circular-buffers.txt
clk.txt
coccinelle.txt
cpu-hotplug.txt
cpu-load.txt
cputopology.txt
crc32.txt
dcdbas.txt
debugging-modules.txt
debugging-via-ohci1394.txt
dell_rbu.txt
devices.txt
digsig.txt
dma-buf-sharing.txt Documentation/dma-buf-sharing.txt: update API descriptions 2014-08-28 11:57:24 +05:30
dmaengine.txt dmaengine: Update documentation for inline wrapper 2014-08-28 12:37:55 +05:30
dmatest.txt
dontdiff
dynamic-debug-howto.txt
edac.txt
efi-stub.txt
eisa.txt
email-clients.txt Documentation: add section about git to email-clients.txt 2014-06-29 13:38:33 -07:00
flexible-arrays.txt
futex-requeue-pi.txt
gcov.txt
highuid.txt
hsi.txt
hw_random.txt
hwspinlock.txt
init.txt
initrd.txt
intel_txt.txt
io-mapping.txt
io_ordering.txt
iostats.txt
irqflags-tracing.txt
isapnp.txt
java.txt
kernel-doc-nano-HOWTO.txt
kernel-docs.txt
kernel-parameters.txt Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2014-10-31 19:51:11 -07:00
kernel-per-CPU-kthreads.txt
kmemcheck.txt
kmemleak.txt Documentation: Add CONFIG_DEBUG_KMEMLEAK_DEFAULT_OFF case 2014-10-24 13:59:03 -04:00
kobject.txt
kprobes.txt Documentation/kprobes: add s390 to list of supported architectures 2014-09-09 08:53:27 +02:00
kref.txt
ldm.txt
local_ops.txt
lockup-watchdogs.txt lockup-watchdogs: Fix a typo 2014-08-26 09:35:52 +02:00
logo.gif
logo.txt
lzo.txt Documentation: lzo: document part of the encoding 2014-09-28 11:08:00 +02:00
magic-number.txt
mailbox.txt doc: add documentation for mailbox framework 2014-10-08 10:39:41 +05:30
md.txt
media-framework.txt
memory-barriers.txt memory-barriers: Fix description of 2-legged-if-based control dependencies 2014-09-07 16:15:53 -07:00
memory-hotplug.txt memory-hotplug: add sysfs valid_zones attribute 2014-10-09 22:25:52 -04:00
module-signing.txt
mono.txt
nommu-mmap.txt
numastat.txt
oops-tracing.txt panic: add TAINT_SOFTLOCKUP 2014-08-08 15:57:24 -07:00
padata.txt
parport-lowlevel.txt
parport.txt
percpu-rw-semaphore.txt
phy.txt phy: core: Let node ptr of PHY point to PHY and not of PHY provider 2014-07-22 12:46:11 +05:30
pi-futex.txt
pinctrl.txt pinctrl: clean up after enable refactoring 2014-09-04 10:05:07 +02:00
pnp.txt
preempt-locking.txt
printk-formats.txt lib/vsprintf: add %*pE[achnops] format specifier 2014-10-14 02:18:26 +02:00
pwm.txt
ramoops.txt
rbtree.txt
remoteproc.txt
rfkill.txt
robust-futex-ABI.txt
robust-futexes.txt
rpmsg.txt
rtc.txt
serial-console.txt
sgi-ioc4.txt
smsc_ece1099.txt
sparse.txt
stable_api_nonsense.txt
stable_kernel_rules.txt stable_kernel_rules: Add pointer to netdev-FAQ for network patches 2014-07-09 15:54:27 -07:00
static-keys.txt
svga.txt
sysfs-rules.txt Documentation/sysfs-rules.txt: Add device attribute error code documentation 2014-09-19 14:44:51 -07:00
sysrq.txt
this_cpu_ops.txt Docs: this_cpu_ops: remove redundant add forms 2014-09-26 11:03:00 +02:00
unaligned-memory-access.txt
unicode.txt
unshare.txt
vfio.txt drivers/vfio: EEH support for VFIO PCI device 2014-08-05 15:28:48 +10:00
vgaarbiter.txt
video-output.txt
vme_api.txt
volatile-considered-harmful.txt
workqueue.txt
xillybus.txt xillybus: Move out of staging 2014-09-23 23:44:16 -07:00
xz.txt
zorro.txt