10 Oct, 2011
1 commit
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* 'upstream' of git://git.linux-mips.org/pub/scm/upstream-linus: (29 commits)
MIPS: Call oops_enter, oops_exit in die
staging/octeon: Software should check the checksum of no tcp/udp packets
MIPS: Octeon: Enable C0_UserLocal probing.
MIPS: No branches in delay slots for huge pages in handle_tlbl
MIPS: Don't clobber CP0_STATUS value for CONFIG_MIPS_MT_SMTC
MIPS: Octeon: Select CONFIG_HOLES_IN_ZONE
MIPS: PM: Use struct syscore_ops instead of sysdevs for PM (v2)
MIPS: Compat: Use 32-bit wrapper for compat_sys_futex.
MIPS: Do not use EXTRA_CFLAGS
MIPS: Alchemy: DB1200: Disable cascade IRQ in handler
SERIAL: Lantiq: Set timeout in uart_port
MIPS: Lantiq: Fix setting the PCI bus speed on AR9
MIPS: Lantiq: Fix external interrupt sources
MIPS: tlbex: Fix build error in R3000 code.
MIPS: Alchemy: Include Au1100 in PM code.
MIPS: Alchemy: Fix typo in MAC0 registration
MIPS: MSP71xx: Fix build error.
MIPS: Handle __put_user() sleeping.
MIPS: Allow forced irq threading
MIPS: i8259: Mark cascade interrupt non-threaded
...
21 Sep, 2011
1 commit
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Without this patch apps using readline hang.
Signed-off-by: Thomas Langer
Signed-off-by: John Crispin
Cc: linux-mips@linux-mips.org
Cc: linux-serial@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/2687/
Signed-off-by: Alan Cox
Signed-off-by: Ralf Baechle
15 Sep, 2011
1 commit
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Fix these errors:
drivers/tty/serial/crisv10.c:4453: error: 'if_ser0' undeclared (first use in this function): 2 errors in 2 logs
drivers/tty/serial/crisv10.c:4453: error: (Each undeclared identifier is reported only once: 2 errors in 2 logs
drivers/tty/serial/crisv10.c:4453: error: for each function it appears in.): 2 errors in 2 logs"if_ser0" is a typo, it should be "if_serial_0".
Signed-off-by: WANG Cong
Cc: Mikael Starvik
Cc: Jesper Nilsson
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
30 Aug, 2011
1 commit
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* 'sh-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-3.x:
sh: fix the compile error in setup-sh7757.c
serial: sh-sci: report CTS as active for get_mctrl
sh: Add unaligned memory access for PC relative intructions
sh: Fix unaligned memory access for branches without delay slots
sh: Fix up fallout from cpuidle changes.
serial: sh-sci: console Runtime PM support
sh: Fix conflicting definitions of ptrace_triggered
serial: sh-sci: fix DMA build by including dma-mapping.h
serial: sh-sci: Fix up default regtype probing.
sh: intc: enable both edges GPIO interrupts on sh7372
shwdt: fix usage of mod_timer
clocksource: sh_cmt: wait for CMCNT on init V2
29 Aug, 2011
2 commits
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sh-sci.c sets hardware up and then let the HW do all flow controls.
There is no software code, nor needs to get/set real CTS signal.But, when turning CRTSCTS on through termios, uart_set_termios() in
serial_core.c checks CTS, and stops TX if it is inactive at the moment.Because sci_get_mctrl() returns a fixed value DTR|RTS|DSR but CTS,
the sequence
open -> set CRTSCTS -> write
hit the case and stop working, no more outputs.This patch makes sci_get_mctrl() report CTS in addition.
Signed-off-by: Takashi YOSHII
Signed-off-by: Paul Mundt -
* 'pm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
ARM: mach-shmobile: sh7372 LCDC1 suspend fix V2 (incremental)
OMAP: omap_device: only override _noirq methods, not normal suspend/resume
PM / Runtime: Correct documentation of pm_runtime_irq_safe()
ARM: mach-shmobile: sh7372 LCDC1 suspend fix
sh-sci / PM: Use power.irq_safe
PM: Use spinlock instead of mutex in clock management functions
25 Aug, 2011
1 commit
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Since sci_port_enable() and sci_port_disable() may be run with
interrupts off and they execute pm_runtime_get_sync() and
pm_runtime_put_sync(), respectively, the SCI device's
power.irq_safe flag has to be set to indicate that it is safe
to execute runtime PM callbacks for this device with interrupts off.Signed-off-by: Rafael J. Wysocki
Acked-by: Magnus Damm
24 Aug, 2011
7 commits
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Fixes logic bug that software flow control cannot be disabled, because
serial_omap_configure_xonxoff() is not called if both IXON and IXOFF bits
are cleared.Signed-off-by: Nick Pelly
Acked-by: Govindraj.R
Tested-by: Govindraj.R
Cc: stable
Signed-off-by: Greg Kroah-Hartman -
When a user has SYS_ADMIN capabilities and uart->ops->startup returns
an error in uart_startup, we silently drop the error. We then return 0
and behave as if it didn't fail. (Not quite, since we set TTY_IO_ERROR
bit and leave ASYNC_INITIALIZED bit cleared.)This all is to allow setserial to work with improperly configured or
unconfigured ports. User can thus set port properties and reconfigure
properly.This patch only documents this behavior.
Signed-off-by: Jiri Slaby
Cc: Alan Cox
Cc: Russel King
Signed-off-by: Greg Kroah-Hartman -
tty_operations->remove is normally called like:
queue_release_one_tty
->tty_shutdown
->tty_driver_remove_tty
->tty_operations->removeHowever tty_shutdown() is called from queue_release_one_tty() only if
tty_operations->shutdown is NULL. But for pty, it is not.
pty_unix98_shutdown() is used there as ->shutdown.So tty_operations->remove of pty (i.e. pty_unix98_remove()) is never
called. This results in invalid pty_count. I.e. what can be seen in
/proc/sys/kernel/pty/nr.I see this was already reported at:
https://lkml.org/lkml/2009/11/5/370
But it was not fixed since then.This patch is kind of a hackish way. The problem lies in ->install. We
allocate there another tty (so-called tty->link). So ->install is
called once, but ->remove twice, for both tty and tty->link. The fix
here is to count both tty and tty->link and divide the count by 2 for
user.And to have ->remove called, let's make tty_driver_remove_tty() global
and call that from pty_unix98_shutdown() (tty_operations->shutdown).While at it, let's document that when ->shutdown is defined,
tty_shutdown() is not called.Signed-off-by: Jiri Slaby
Cc: Alan Cox
Cc: "H. Peter Anvin"
Cc: stable
Signed-off-by: Greg Kroah-Hartman -
This is to fix an issue where output will suddenly become very slow.
The problem occurs on 8250 UARTS with the hardware bug UART_BUG_THRE.BACKGROUND
For normal UARTs (without UART_BUG_THRE): When the serial core layer
gets new transmit data and the transmitter is idle, it buffers the
data and calls the 8250s' serial8250_start_tx() routine which will
simply enable the TX interrupt in the IER register and return. This
should immediately fire a THRE interrupt and begin transmitting the
data.
For buggy UARTs (with UART_BUG_THRE): merely enabling the TX interrupt
in IER does not necessarily generate a new THRE interrupt.
Therefore, a background timer periodically checks to see if there is
pending data, and starts transmission if that is the case.The bug happens on SMP systems when the system has nothing to transmit,
the transmit interrupt is disabled and the following sequence occurs:
- CPU0: The background timer routine serial8250_backup_timeout()
starts and saves the state of the interrupt enable register (IER)
and then disables all interrupts in IER. NOTE: The transmit interrupt
(TI) bit is saved as disabled.
- CPU1: The serial core gets data to transmit, grabs the port lock and
calls serial8250_start_tx() which enables the TI in IER.
- CPU0: serial8250_backup_timeout() waits for the port lock.
- CPU1: finishes (with TI enabled) and releases the port lock.
- CPU0: serial8250_backup_timeout() calls the interrupt routine which
will transmit the next fifo's worth of data and then restores the
IER from the previously saved value (TI disabled).
At this point, as long as the serial core has more transmit data
buffered, it will not call serial8250_start_tx() again and the
background timer routine will slowly transmit the data.The fix is to have serial8250_start_tx() get the port lock before
it saves the IER state and release it after restoring IER. This will
prevent serial8250_start_tx() from running in parallel.Signed-off-by: Al Cooper
Cc: stable
Signed-off-by: Greg Kroah-Hartman -
Data definiton "VendorID=10DB, device_id=800D" is already defined.
This patch deletes the duplicate definition.Signed-off-by: Tomoya MORINAGA
Signed-off-by: Greg Kroah-Hartman -
This patch adds support for the Rosewill RC-305 four-port PCI serial
card, and probably any other four-port serial cards based on the
Moschip MCS9865 chip, assuming that the EEPROM on the card was
programmed in accordance with Table 6 of the MCS9865 EEPROM
Application Note version 0.3 dated 16-May-2008, available from the
Moschip web site (registration required).This patch is based on an earlier patch [1] for the SYBA 6x serial
port card by Ira W. Snyder.[1]: http://www.gossamer-threads.com/lists/linux/kernel/1162435
Signed-off-by: Eric Smith
Cc: stable
Signed-off-by: Greg Kroah-Hartman -
Since commit e0626e38 (spi: prefix modalias with "spi:"),
the spi modalias is prefixed with "spi:".This patch adds "spi:" prefix and removes "-spi" suffix in the modalias.
Signed-off-by: Axel Lin
Cc: stable
Signed-off-by: Greg Kroah-Hartman
23 Aug, 2011
4 commits
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reflect new static uart platform ids introduced by patch
http://article.gmane.org/gmane.linux.kernel/1126105Signed-off-by: Nikolaus Voss
Signed-off-by: Greg Kroah-Hartman -
It would have been nice if Intermec had supplied a PNP0501 _CID for the
COM3 device, but they didn't, so we have to recognize it explicitly.Reference: https://bugzilla.kernel.org/show_bug.cgi?id=40612
CC: Jeff Chua
Signed-off-by: Bjorn Helgaas
Cc: stable
Acked-by: Alan Cox
Signed-off-by: Greg Kroah-Hartman -
drivers/tty/serial/ucc_uart.c: In function 'qe2cpu_addr':
drivers/tty/serial/ucc_uart.c:238:2: warning: format '%x' expects type 'unsigned int', but argument 3 has type 'dma_addr_t'Signed-off-by: Kumar Gala
Acked-by: Timur Tabi
Signed-off-by: Greg Kroah-Hartman -
Currently, PCIe bus number is set as fixed value "2".
However, PCIe bus number is not always "2".
This patch sets bus number using probe() parameter.Signed-off-by: Tomoya MORINAGA
Signed-off-by: Greg Kroah-Hartman
09 Aug, 2011
1 commit
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drivers/tty/serial/samsung.c: In function 's3c24xx_serial_init':
drivers/tty/serial/samsung.c:1237: error: lvalue required as unary '&' operandCc: Greg Kroah-Hartman
Signed-off-by: Kukjin Kim
Signed-off-by: Greg Kroah-Hartman
08 Aug, 2011
2 commits
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Conflicts:
drivers/tty/serial/sh-sci.cSigned-off-by: Paul Mundt
-
Commit d006199e72a9 ("serial: sh-sci: Regtype probing doesn't need to be
fatal.") made sci_init_single() return when sci_probe_regmap() succeeds,
although it should return when sci_probe_regmap() fails. This causes
systems using the serial sh-sci driver to crash during boot.Fix the problem by using the right return condition.
Signed-off-by: Rafael J. Wysocki
Signed-off-by: Linus Torvalds
04 Aug, 2011
1 commit
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of_alias_get_id() is broken and being reverted. Remove the reference
to it and replace with a single incrementing id number.There is no risk of regression here on the imx driver since the imx
change to use of_alias_get_id() is commit 22698aa2, "serial/imx: add
device tree probe support" which is new for v3.1, and it won't get
used unless CONFIG_OF is enabled and the board is booted using a
device tree. A single incrementing integer is sufficient for now.Signed-off-by: Grant Likely
Acked-by: Shawn Guo
03 Aug, 2011
3 commits
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Add Runtime PM context save/restore support to
the SCIF driver. Tested on the AP4EVB console.Signed-off-by: Magnus Damm
Signed-off-by: Paul Mundt -
Include dma-mapping.h to fix build of the sh-sci driver on
SH-Mobile ARM (sh73a0) when CONFIG_SERIAL_SH_SCI_DMA=y:drivers/tty/serial/sh-sci.c: In function 'sci_rx_dma_release':
drivers/tty/serial/sh-sci.c:1182:3: error: implicit declaration of function 'dma_free_coherent'
drivers/tty/serial/sh-sci.c: In function 'work_fn_tx':
drivers/tty/serial/sh-sci.c:1333:2: error: implicit declaration of function 'dma_sync_sg_for_device'
drivers/tty/serial/sh-sci.c: In function 'sci_request_dma':
drivers/tty/serial/sh-sci.c:1498:3: error: implicit declaration of function 'dma_map_sg'
drivers/tty/serial/sh-sci.c:1527:3: error: implicit declaration of function 'dma_alloc_coherent'
drivers/tty/serial/sh-sci.c:1527:10: warning: assignment makes pointer from integer without a cast
make[3]: *** [drivers/tty/serial/sh-sci.o] Error 1
make[2]: *** [drivers/tty/serial] Error 2
make[1]: *** [drivers/tty] Error 2
make: *** [drivers] Error 2Signed-off-by: Magnus Damm
Tested-by: Simon Horman
Signed-off-by: Paul Mundt -
Presently the default regtype probing inadvertently bails out due to an
inverted error check. This fixes it up, and gets platforms without
explicit regtype specifications working again.Reported-by: Magnus Damm
Signed-off-by: Paul Mundt
02 Aug, 2011
1 commit
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* 'sh-latest' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-3.x: (39 commits)
SH: static should be at beginning of declaration
sh: move CLKDEV_xxx_ID macro to sh_clk.h
sh: clock-shx3: add CLKDEV_ICK_ID for cleanup
sh: clock-sh7786: add CLKDEV_ICK_ID for cleanup
sh: clock-sh7785: add CLKDEV_ICK_ID for cleanup
sh: clock-sh7757: add CLKDEV_ICK_ID for cleanup
sh: clock-sh7366: add CLKDEV_ICK_ID for cleanup
sh: clock-sh7343: add CLKDEV_ICK_ID for cleanup
sh: clock-sh7722: add CLKDEV_ICK_ID for cleanup
sh: clock-sh7724: add CLKDEV_ICK_ID for cleanup
sh: clock-sh7366: modify I2C clock settings
sh: clock-sh7343: modify I2C clock settings
sh: clock-sh7723: modify I2C clock settings
sh: clock-sh7722: modify I2C clock settings
sh: clock-sh7724: modify I2C clock settings
serial: sh-sci: Fix up pretty name printing for port IRQs.
serial: sh-sci: Kill off per-port enable/disable callbacks.
serial: sh-sci: Add missing module description/author bits.
serial: sh-sci: Regtype probing doesn't need to be fatal.
sh: Tidy up pre-clkdev clk_get() error handling.
...
27 Jul, 2011
3 commits
-
It adds device tree probe support for imx tty/serial driver.
Signed-off-by: Jeremy Kerr
Signed-off-by: Jason Liu
Signed-off-by: Shawn Guo
Cc: Sascha Hauer
Cc: Alan Cox
Cc: Cc: Greg Kroah-Hartman
Cc: Grant Likely
Acked-by: Grant Likely -
The patch removes all the uses of cpu_is_mx1(). Instead, it uses
the .id_table of platform_driver to distinguish the uart device type,
IMX1_UART and IMX21_UART. The IMX21_UART type runs on all i.mx
except i.mx1.A couple of !cpu_is_mx1 logic gets turned into is_imx21_uart,
as the codes wrapped there are really IMX21 type uart specific.It also removes macro MX1_UCR3_REF25 and MX1_UCR3_REF30 which are
not used anywhere.Signed-off-by: Shawn Guo
Cc: Sascha Hauer
Cc: Alan Cox
Cc: Greg Kroah-Hartman
Acked-by: Grant Likely -
This allows us to move duplicated code in
(atomic_inc_not_zero() for now) toSigned-off-by: Arun Sharma
Reviewed-by: Eric Dumazet
Cc: Ingo Molnar
Cc: David Miller
Cc: Eric Dumazet
Acked-by: Mike Frysinger
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
26 Jul, 2011
5 commits
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* 'tty-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6: (26 commits)
amba pl011: workaround for uart registers lockup
n_gsm: fix the wrong FCS handling
pch_uart: add missing comment about OKI ML7223
pch_uart: Add MSI support
tty: fix "IRQ45: nobody cared"
PTI feature to allow user to name and mark masterchannel request.
0 for o PTI Makefile bug.
tty: serial: samsung.c remove legacy PM code.
SERIAL: SC26xx: Fix link error.
serial: mrst_max3110: initialize waitqueue earlier
mrst_max3110: Change max missing message priority.
tty: s5pv210: Add delay loop on fifo reset function for UART
tty/serial: Fix XSCALE serial ports, e.g. ce4100
serial: bfin_5xx: fix off-by-one with resource size
drivers/tty: use printk_ratelimited() instead of printk_ratelimit()
tty: n_gsm: Added refcount usage to gsm_mux and gsm_dlci structs
tty: n_gsm: Add raw-ip support
tty: n_gsm: expose gsmtty device nodes at ldisc open time
pch_phub: Fix register miss-setting issue
serial: 8250, increase PASS_LIMIT
... -
* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: (99 commits)
drivers/virt: add missing linux/interrupt.h to fsl_hypervisor.c
powerpc/85xx: fix mpic configuration in CAMP mode
powerpc: Copy back TIF flags on return from softirq stack
powerpc/64: Make server perfmon only built on ppc64 server devices
powerpc/pseries: Fix hvc_vio.c build due to recent changes
powerpc: Exporting boot_cpuid_phys
powerpc: Add CFAR to oops output
hvc_console: Add kdb support
powerpc/pseries: Fix hvterm_raw_get_chars to accept < 16 chars, fixing xmon
powerpc/irq: Quieten irq mapping printks
powerpc: Enable lockup and hung task detectors in pseries and ppc64 defeconfigs
powerpc: Add mpt2sas driver to pseries and ppc64 defconfig
powerpc: Disable IRQs off tracer in ppc64 defconfig
powerpc: Sync pseries and ppc64 defconfigs
powerpc/pseries/hvconsole: Fix dropped console output
hvc_console: Improve tty/console put_chars handling
powerpc/kdump: Fix timeout in crash_kexec_wait_realmode
powerpc/mm: Fix output of total_ram.
powerpc/cpufreq: Add cpufreq driver for Momentum Maple boards
powerpc: Correct annotations of pmu registration functions
...Fix up trivial Kconfig/Makefile conflicts in arch/powerpc, drivers, and
drivers/cpufreq -
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (43 commits)
fs: Merge split strings
treewide: fix potentially dangerous trailing ';' in #defined values/expressions
uwb: Fix misspelling of neighbourhood in comment
net, netfilter: Remove redundant goto in ebt_ulog_packet
trivial: don't touch files that are removed in the staging tree
lib/vsprintf: replace link to Draft by final RFC number
doc: Kconfig: `to be' -> `be'
doc: Kconfig: Typo: square -> squared
doc: Konfig: Documentation/power/{pm => apm-acpi}.txt
drivers/net: static should be at beginning of declaration
drivers/media: static should be at beginning of declaration
drivers/i2c: static should be at beginning of declaration
XTENSA: static should be at beginning of declaration
SH: static should be at beginning of declaration
MIPS: static should be at beginning of declaration
ARM: static should be at beginning of declaration
rcu: treewide: Do not use rcu_read_lock_held when calling rcu_dereference_check
Update my e-mail address
PCIe ASPM: forcedly -> forcibly
gma500: push through device driver tree
...Fix up trivial conflicts:
- arch/arm/mach-ep93xx/dma-m2p.c (deleted)
- drivers/gpio/gpio-ep93xx.c (renamed and context nearby)
- drivers/net/r8169.c (just context changes) -
…/git/arm/linux-arm-soc
* 'next/deletion' of git+ssh://master.kernel.org/pub/scm/linux/kernel/git/arm/linux-arm-soc:
ARM: mach-loki: delete
ARM: mach-s3c2400: delete
ARM: mach-s3c24a0: delete -
* 'next/cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/linux-arm-soc: (133 commits)
ARM: EXYNOS4: Change devname for FIMD clkdev
ARM: S3C64XX: Cleanup mach/regs-fb.h from mach-s3c64xx
ARM: S5PV210: Cleanup mach/regs-fb.h from mach-s5pv210
ARM: S5PC100: Cleanup mach/regs-fb.h from mach-s5pc100
ARM: S3C24XX: Use generic s3c_set_platdata for devices
ARM: S3C64XX: Use generic s3c_set_platdata for OneNAND
ARM: SAMSUNG: Use generic s3c_set_platdata for NAND
ARM: SAMSUNG: Use generic s3c_set_platdata for USB OHCI
ARM: SAMSUNG: Use generic s3c_set_platdata for HWMON
ARM: SAMSUNG: Use generic s3c_set_platdata for FB
ARM: SAMSUNG: Use generic s3c_set_platdata for TS
ARM: S3C64XX: Add PWM backlight support on SMDK6410
ARM: S5P64X0: Add PWM backlight support on SMDK6450
ARM: S5P64X0: Add PWM backlight support on SMDK6440
ARM: S5PC100: Add PWM backlight support on SMDKC100
ARM: S5PV210: Add PWM backlight support on SMDKV210
ARM: EXYNOS4: Add PWM backlight support on SMDKC210
ARM: EXYNOS4: Add PWM backlight support on SMDKV310
ARM: SAMSUNG: Create a common infrastructure for PWM backlight support
clocksource: convert 32-bit down counting clocksource on S5PV210/S5P64X0
...Fix up trivial conflict in arch/arm/mach-imx/mach-scb9328.c
23 Jul, 2011
1 commit
-
* 'devicetree/next' of git://git.secretlab.ca/git/linux-2.6:
dt: include linux/errno.h in linux/of_address.h
of/address: Add of_find_matching_node_by_address helper
dt: remove extra xsysace platform_driver registration
tty/serial: Add devicetree support for nVidia Tegra serial ports
dt: add empty of_property_read_u32[_array] for non-dt
dt: bindings: move SEC node under new crypto/
dt: add helper function to read u32 arrays
tty/serial: change of_serial to use new of_property_read_u32() api
dt: add 'const' for of_property_read_string parameter **out_string
dt: add helper functions to read u32 and string property values
tty: of_serial: support for 32 bit accesses
dt: document the of_serial bindings
dt/platform: allow device name to be overridden
drivers/amba: create devices from device tree
dt: add of_platform_populate() for creating device from the device tree
dt: Add default match table for bus ids
21 Jul, 2011
1 commit
20 Jul, 2011
2 commits
-
Uart port is registered as a console during the driver's probe.
So explict registration of console with console_initcall is
removed.Signed-off-by: Thomas Abraham
[kgene.kim@samsung.com: removed changes of s3c2400 and s3c24a0]
Signed-off-by: Kukjin Kim -
For some reason I didn't notice the failure in my test builds,
probably lacking caffeine or something...Signed-off-by: Benjamin Herrenschmidt
19 Jul, 2011
2 commits
-
Add poll_get_char and poll_put_char for kdb. Enable kdb at boot with:
kgdboc=hvc0
or at runtime with:
echo hvc0 > /sys/module/kgdboc/parameters/kgdboc
Signed-off-by: Anton Blanchard
Signed-off-by: Benjamin Herrenschmidt -
commit 4d2bb3f50036 (powerpc/pseries: Re-implement HVSI as part of
hvc_vio) changed udbg_getc to be based on hvterm_raw_get_chars.
Unfortunately hvterm_raw_get_chars returns -EAGAIN if you ask
for anything less than 16 characters. As a result xmon no longer
accepts input and prints a stream of junk to the screen.The recent change highlights a problem that xmon on pseries VIO
has had all along, that it can drop input characters. The issue
is the hypervisor call does not take a count argument and can
return up to 16 characters.This patch adds a per vterm buffer that we copy input data into
and give it out as requested.Signed-off-by: Anton Blanchard
Signed-off-by: Benjamin Herrenschmidt
