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5e3092bd68
linux/drivers
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Stephen Boyd 5e3092bd68 tty: hvc_dcc: Fix duplicate character inputs 
commit c2a3e84f95 upstream.

Reading from the DCC grabs a character from the buffer and
clears the status bit. Since this is a context-changing
operation, instructions following the character read that rely on
the status bit being accurate need to be synchronized with an
ISB.

In this case, the status bit check needs to execute after the
character read otherwise we run the risk of reading the character
and checking the status bit before the read can clear the status
bit in the first place. When this happens, the user will see the
same character they typed twice, instead of once.

Add an ISB after the read and the write, so that the status check
is synchronized with the read/write operations.

Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-11-26 09:09:57 -08:00
..
accessibility
acpi ACPI atomicio: Convert width in bits to bytes in __acpi_ioremap_fast() 2011-11-11 09:37:11 -08:00
amba ARM: 6829/1: amba: make hardcoded periphid override hardware 2011-05-26 10:33:34 +01:00
ata ata_piix: make DVD Drive recognisable on systems with Intel Sandybridge chipsets(v2) 2011-11-11 09:35:50 -08:00
atm Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6 2011-05-20 13:43:21 -07:00
auxdisplay
base PM / driver core: disable device's runtime PM during shutdown 2011-11-26 09:09:56 -08:00
bcma drivers/bcma/host_pci.c needs slab.h 2011-05-26 17:12:32 -07:00
block xen/blkback: Report VBD_WSECT (wr_sect) properly. 2011-11-11 09:37:07 -08:00
bluetooth btusb: add device entry for Broadcom SoftSailing 2011-11-11 09:36:43 -08:00
cdrom block: fix mismerge of the DISK_EVENT_MEDIA_CHANGE removal 2011-06-02 05:29:19 +09:00
char TPM: Zero buffer after copying to userspace 2011-10-03 11:40:58 -07:00
clk
clocksource Revert "clocksource: sh_cmt: Runtime PM support" 2011-05-31 15:26:42 +09:00
connector Connector: Correctly set the error code in case of success when dispatching receive callbacks 2011-06-07 12:02:00 -07:00
cpufreq drivers/cpufreq/pcc-cpufreq.c: avoid NULL pointer dereference 2011-10-03 11:40:31 -07:00
cpuidle Merge branch 'idle-release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-idle-2.6 2011-05-29 11:18:09 -07:00
crypto crypto: caam - fix operator precedence in shared descriptor allocation 2011-06-30 07:43:27 +08:00
dca
dio
dma dmaengine: shdma: SH_DMAC_MAX_CHANNELS message fix 2011-06-14 15:03:07 +09:00
edac i7core_edac: fixed typo in error count calculation 2011-08-29 13:29:06 -07:00
eisa
firewire firewire: sbp2: fix panic after rmmod with slow targets 2011-10-25 07:10:16 +02:00
firmware drivers/firmware/sigma.c needs MODULE_LICENSE 2011-08-04 21:58:38 -07:00
gpio gpio: wm831x: add a missing break in wm831x_gpio_dbg_show 2011-07-15 14:03:30 -06:00
gpu drm/i915/pch: Save/restore PCH_PORT_HOTPLUG across suspend 2011-11-26 09:09:53 -08:00
hid hid/apple: modern macbook airs use the standard apple function key translations 2011-11-11 09:37:22 -08:00
hwmon hwmon: (w83627ehf) Fix broken driver init 2011-11-11 09:37:00 -08:00
hwspinlock hwspinlock/core: use a mutex to protect the radix tree 2011-11-11 09:36:31 -08:00
i2c Merge branch 'for-30-rc5/all-i2c' of git://git.fluff.org/bjdooks/linux 2011-07-07 16:29:29 -07:00
ide ide-disk: Fix request requeuing 2011-10-16 14:14:51 -07:00
idle
ieee802154
infiniband cxgb3i: convert cdev->l2opt to use rcu to prevent NULL dereference 2011-10-03 11:41:08 -07:00
input input: pmic8xxx-pwrkey: Do not use mfd_get_data() 2011-07-05 10:38:43 +02:00
isdn net: Audit drivers to identify those needing IFF_TX_SKB_SHARING cleared 2011-08-15 18:31:38 -07:00
leds Revert "leds: save the delay values after a successful call to blink_set()" 2011-11-21 14:31:19 -08:00
lguest
macintosh Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2011-05-23 09:12:26 -07:00
mca
md md/raid5: abort any pending parity operations when array fails. 2011-11-21 14:31:22 -08:00
media saa7164: Add support for another HVR2200 hardware revision 2011-11-26 09:09:53 -08:00
memstick
message Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2011-05-23 09:12:26 -07:00
mfd mfd: Fix twl4030 dependencies for audio codec 2011-11-21 14:31:23 -08:00
misc pch_phub: Fix MAC address writing issue for LAPIS ML7831 2011-11-26 09:09:56 -08:00
mmc mmc: core: ext_csd.raw_* used in comparison but never set 2011-11-11 09:35:23 -08:00
mtd mtd: nand_base: always initialise oob_poi before writing OOB data 2011-11-11 09:37:19 -08:00
net rt2x00: Fix sleep-while-atomic bug in powersaving code. 2011-11-26 09:09:54 -08:00
nfc
nubus
of Merge branch 'devicetree/arm-next' of git://git.secretlab.ca/git/linux-2.6 into devel-stable 2011-05-25 00:08:17 +01:00
oprofile oprofile: Fix locking dependency in sync_start() 2011-05-31 16:33:34 +02:00
parisc
parport Merge branch 'trivial' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild-2.6 2011-05-26 13:19:00 -07:00
pci xen-pcifront: Update warning comment to use 'e820_host' option. 2011-11-11 09:35:46 -08:00
pcmcia pcmcia: pxa2xx/vpac270: free gpios on exist rather than requesting 2011-07-11 14:26:34 +08:00
platform WMI: properly cleanup devices to avoid crashes 2011-11-11 09:36:09 -08:00
pnp
power drivers/power/ds2780_battery.c: fix deadlock upon insertion and removal 2011-11-11 09:36:32 -08:00
pps
ps3
ptp ptp: Fix some locking bugs in ptp_read() 2011-06-01 19:29:10 -07:00
rapidio rapidio: fix use of non-compatible registers 2011-10-03 11:39:46 -07:00
regulator regulator: tps65910: Add missing breaks in switch/case 2011-10-03 11:40:01 -07:00
rtc rtc: Fix RTC PIE frequency limit 2011-10-03 11:40:08 -07:00
s390 ccwgroup: move attributes to attribute group 2011-11-11 09:36:09 -08:00
sbus
scsi aacraid: controller hangs if kernel uses non-default ASPM policy 2011-11-26 09:09:52 -08:00
sfi
sh drivers: sh: resume enabled clocks fix 2011-06-14 15:15:25 +09:00
sn
spi spi/s3c64xx: Bug fix for SPI with different FIFO level 2011-07-06 15:03:08 +09:00
ssb ssb: fix init regression of hostmode PCI core 2011-07-07 13:06:08 -04:00
staging Staging: hv: Add support for >2 TB LUN in storage driver. 2011-11-11 09:35:14 -08:00
target tcm_loop: Add explict read buffer memset for SCF_SCSI_CONTROL_SG_IO_CDB 2011-11-11 09:37:01 -08:00
tc
telephony
thermal
tty tty: hvc_dcc: Fix duplicate character inputs 2011-11-26 09:09:57 -08:00
uio
usb USB: Update last_busy time after autosuspend fails 2011-11-11 09:36:57 -08:00
uwb
vhost vhost: support event index 2011-05-30 11:14:15 +09:30
video viafb: improve pitch handling 2011-11-11 09:36:13 -08:00
virtio virtio-pci: fix use after free 2011-11-21 14:31:14 -08:00
vlynq
w1 drivers/power/ds2780_battery.c: add a nolock function to w1 interface 2011-11-11 09:36:32 -08:00
watchdog watchdog: shwdt: fix usage of mod_timer 2011-08-04 21:58:42 -07:00
xen xen-gntalloc: signedness bug in add_grefs() 2011-11-21 14:31:24 -08:00
zorro zorro: Defer device_register() until all devices have been identified 2011-10-03 11:40:57 -07:00
Kconfig ptp: Added a brand new class driver for ptp clocks. 2011-05-23 13:01:00 -07:00
Makefile Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx 2011-05-28 12:35:15 -07:00