linux-stable.git/drivers/tty/serial, branch linux-2.6.38.y

serial/imx: read cts state only after acking cts change irq

2011-05-02T16:19:38+00:00

commit 5680e94148a86e8c31fdc5cb0ea0d5c6810c05b0 upstream.

If cts changes between reading the level at the cts input (USR1_RTSS)
and acking the irq (USR1_RTSD) the last edge doesn't generate an irq and
uart_handle_cts_change is called with a outdated value for cts.

The race was introduced by commit

	ceca629 ([ARM] 2971/1: i.MX uart handle rts irq)

Reported-by: Arwed Springer 
Tested-by: Arwed Springer 
Signed-off-by: Uwe Kleine-König 
Signed-off-by: Greg Kroah-Hartman

serial: change the divisor latch only when prescalar actually changed

2011-03-23T20:03:45+00:00

commit 0d0389e5414c8950b1613e8bdc74289cde3d6d98 upstream.

In 8250.c original ns16550 autoconfig code, we change the divisor latch when
we goto to high speed mode, we're assuming the previous speed is legacy. This
some times is not true.

For example in a system with both CONFIG_SERIAL_8250 and
CONFIG_SERIAL_8250_PNP set, in this case, the code (autoconfig) will be called
twice, one in serial8250_init/probe() and the other is from
serial_pnp_probe. When serial_pnp_probe calls the autoconfig for NS16550A,
it's already in high speed mode, change the divisor latch (quot << 3) in this
case will make the UART console garbled.

CC: Greg Kroah-Hartman 
CC: David Woodhouse 
CC: linux-kernel@vger.kernel.org
Signed-off-by: Yin Kangkai 
Signed-off-by: Greg Kroah-Hartman

serial: also set the uartclk value in resume after goes to highspeed

2011-03-23T20:03:45+00:00

commit 95926d2db6256e08d06b753752a0d903a0580acc upstream.

For any reason if the NS16550A was not work in high speed mode (e.g. we hold
NS16550A from going to high speed mode in autoconfig_16550a()), now we are
resume from suspend, we should also set the uartclk to the correct
value. Otherwise it is still the old 1843200 and that will bring issues.

CC: Greg Kroah-Hartman 
CC: David Woodhouse 
CC: linux-kernel@vger.kernel.org
Signed-off-by: Yin Kangkai 
Signed-off-by: Greg Kroah-Hartman

serial: mrst_max3110: make buffer larger

2011-03-23T20:03:44+00:00

commit d8653d305ef66861c91fa7455fb8038460a7274c upstream.

This is used to store the spi_device ->modalias so they have to be the same
size.  SPI_NAME_SIZE is 32.

Signed-off-by: Dan Carpenter 
Signed-off-by: Alan Cox 
Signed-off-by: Greg Kroah-Hartman

fmvj18x_cs: add new id

2011-02-28T20:06:20+00:00

fmvj18x_cs:add new id
           Toshiba lan&modem multifuction card (model name:IPC5010A)

Signed-off-by: Ken Kawasaki 
Signed-off-by: David S. Miller

Merge branch 'fixes-2.6.38' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq

2011-02-18T20:36:06+00:00

* 'fixes-2.6.38' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq:
  workqueue: make sure MAYDAY_INITIAL_TIMEOUT is at least 2 jiffies long
  workqueue, freezer: unify spelling of 'freeze' + 'able' to 'freezable'
  workqueue: wake up a worker when a rescuer is leaving a gcwq

workqueue, freezer: unify spelling of 'freeze' + 'able' to 'freezable'

2011-02-16T16:48:59+00:00

There are two spellings in use for 'freeze' + 'able' - 'freezable' and
'freezeable'.  The former is the more prominent one.  The latter is
mostly used by workqueue and in a few other odd places.  Unify the
spelling to 'freezable'.

Signed-off-by: Tejun Heo 
Reported-by: Alan Stern 
Acked-by: "Rafael J. Wysocki" 
Acked-by: Greg Kroah-Hartman 
Acked-by: Dmitry Torokhov 
Cc: David Woodhouse 
Cc: Alex Dubov 
Cc: "David S. Miller" 
Cc: Steven Whitehouse

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu

2011-02-16T01:51:18+00:00

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu:
  m68knommu: set flow handler for secondary interrupt controller of 5249
  m68knommu: remove use of IRQ_FLG_LOCK from 68360 platform support
  m68knommu: fix dereference of port.tty
  m68knommu: add missing linker __modver section
  m68knommu: fix mis-named variable int set_irq_chip loop
  m68knommu: add optimize memmove() function
  m68k: remove arch specific non-optimized memcmp()
  m68knommu: fix use of un-defined _TIF_WORK_MASK
  m68knommu: Rename m548x_wdt.c to m54xx_wdt.c
  m68knommu: fix m548x_wdt.c compilation after headers renaming
  m68knommu: Remove dependencies on nonexistent M68KNOMMU

m68knommu: fix dereference of port.tty

2011-02-15T23:43:18+00:00

The struct_tty associated with a port is now a direct pointer
from within the local private driver info struct. So fix all uses
of it.

Signed-off-by: Greg Ungerer

serial: bfin_5xx: split uart RX lock from uart port lock to avoid deadlock

2011-02-03T22:44:54+00:00

The RX lock is used to protect the RX buffer from concurrent access in DMA
mode between the timer and RX interrupt routines.  It is independent from
the uart lock which is used to protect the TX buffer.  It is possible for
a uart TX transfer to be started up from the RX interrupt handler if low
latency is enabled.  So we need to split the locks to avoid deadlocking in
this situation.

In PIO mode, the RX lock is not necessary because the handle_simple_irq
and handle_level_irq functions ensure driver interrupt handlers are called
once on one core.

And now that the RX path has its own lock, the TX interrupt has nothing to
do with the RX path, so disabling it at the same time.

Signed-off-by: Sonic Zhang 
Signed-off-by: Mike Frysinger 
Signed-off-by: Greg Kroah-Hartman