linux.git/drivers/tty, branch v4.4-rc2

serial: export fsl8250_handle_irq

2015-11-21T00:19:54+00:00

fsl8250_handle_irq is now used by the of_serial driver, and that fails
if it is a loadable module:

ERROR: "fsl8250_handle_irq" [drivers/tty/serial/of_serial.ko] undefined!

This exports the symbol to avoid randconfig errors.

Signed-off-by: Arnd Bergmann 
Fixes: d43b54d269d2 ("serial: Enable Freescale 16550 workaround on arm")
Cc: Scott Wood 
Signed-off-by: Jeff Mahoney 
Signed-off-by: Greg Kroah-Hartman

serial: 8250_mid: Add missing dependency

2015-11-21T00:19:54+00:00

8250_mid uses rational_best_approximation() function, so the
driver needs to select CONFIG_RATIONAL option.

This fixes build error when CONFIG_RATIONAL is not enabled:

drivers/built-in.o: In function `mid8250_set_termios':
8250_mid.c:(.text+0x10169a): undefined reference to `rational_best_approximation'

Reported-by: Randy Dunlap 
Signed-off-by: Heikki Krogerus 
Acked-by: Andy Shevchenko 
Signed-off-by: Arnd Bergmann 
Signed-off-by: Greg Kroah-Hartman

tty: audit: Fix audit source

2015-11-21T00:19:54+00:00

The data to audit/record is in the 'from' buffer (ie., the input
read buffer).

Fixes: 72586c6061ab ("n_tty: Fix auditing support for cannonical mode")
Cc: stable  # 4.1+
Cc: Miloslav Trmač 
Signed-off-by: Peter Hurley 
Acked-by: Laura Abbott 
Signed-off-by: Greg Kroah-Hartman

serial: etraxfs-uart: Fix crash

2015-11-21T00:19:54+00:00

Since commit 7d8c70d8048c ("serial: mctrl-gpio: rename init function"),
crisv32 either do not build or crash as follows.

Unable to handle kernel NULL pointer dereference
Linux 4.3.0-rc7-next-20151101 #1 Sun Nov 1 11:41:28 PST 2015
...
Call Trace: [] show_stack+0x0/0x9e
[] printk+0x0/0x2c
[] show_registers+0x14a/0x1c2
[] printk+0x0/0x2c
[] die_if_kernel+0x7c/0x9e
[] do_page_fault+0x32e/0x3e6
[] of_get_property+0x0/0x2c
[] of_irq_parse_raw+0x12a/0x376
[] of_get_property+0x0/0x2c
[] get_page_from_freelist+0x73e/0x856
[] of_get_property+0x0/0x2c
[] d_mmu_refill+0x10a/0x112
[] devm_kmalloc+0x40/0x56
[] add_dr+0xc/0x1c
[] devm_add_action+0x2/0x4e
[] mctrl_gpio_init_noauto+0x1c/0x76
[] mctrl_gpio_init+0x22/0x110

The function call in the etraxfs-uart driver was not renamed,
possibly due to interference with commit 7b9c5162c182 ("serial:
etraxfs-uart: use mctrl_gpio helpers for handling modem signals").

Fixes: 7d8c70d8048c ("serial: mctrl-gpio: rename init function")
Signed-off-by: Guenter Roeck 
Acked-by: Uwe Kleine-König 
Acked-by: Niklas Cassel 
Signed-off-by: Greg Kroah-Hartman

serial: fsl_lpuart: Fix earlycon support

2015-11-21T00:19:54+00:00

Earlycon support for Freescale lpuart should only be enabled when
console support is enabled.

Fixes: 1d59b382f1c4 ("serial: fsl_lpuart: add earlycon support")
Acked-by: Stefan Agner 
Signed-off-by: Peter Hurley 
Acked-by: Arnd Bergmann 
Signed-off-by: Greg Kroah-Hartman

bcm63xx_uart: Use the device name when registering an interrupt

2015-11-21T00:19:54+00:00

Use the device name when registering an interrupt so that multiple
ports don't all have the same interrupt name.

Signed-off-by: Simon Arlott 
Signed-off-by: Greg Kroah-Hartman

tty: Fix direct use of tty buffer work

2015-11-21T00:19:54+00:00

Recent abstraction of tty buffer work introduced api to manage
tty input kworker; use it.

Fixes: e176058f0de5 ("tty: Abstract tty buffer work")
Signed-off-by: Peter Hurley 
Signed-off-by: Greg Kroah-Hartman

tty: Fix tty_send_xchar() lock order inversion

2015-11-21T00:19:54+00:00

The correct lock order is atomic_write_lock => termios_rwsem, as
established by tty_write() => n_tty_write().

Fixes: c274f6ef1c666 ("tty: Hold termios_rwsem for tcflow(TCIxxx)")
Reported-and-Tested-by: Dmitry Vyukov 
Cc:  # v3.18+
Signed-off-by: Peter Hurley 
Signed-off-by: Greg Kroah-Hartman

Merge tag 'asm-generic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic

2015-11-06T22:22:15+00:00

Pull asm-generic cleanups from Arnd Bergmann:
 "The asm-generic changes for 4.4 are mostly a series from Christoph
  Hellwig to clean up various abuses of headers in there.  The patch to
  rename the io-64-nonatomic-*.h headers caused some conflicts with new
  users, so I added a workaround that we can remove in the next merge
  window.

  The only other patch is a warning fix from Marek Vasut"

* tag 'asm-generic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic:
  asm-generic: temporarily add back asm-generic/io-64-nonatomic*.h
  asm-generic: cmpxchg: avoid warnings from macro-ized cmpxchg() implementations
  gpio-mxc: stop including 
  n_tracesink: stop including 
  n_tracerouter: stop including 
  mlx5: stop including 
  hifn_795x: stop including 
  drbd: stop including 
  move count_zeroes.h out of asm-generic
  move io-64-nonatomic*.h out of asm-generic

Merge tag 'spi-v4.4' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi

2015-11-05T21:15:12+00:00

Pull spi updates from Mark Brown:
 "Quite a lot of activity in SPI this cycle, almost all of it in drivers
  with a few minor improvements and tweaks in the core.

   - Updates to pxa2xx to support Intel Broxton and multiple chip selects.
   - Support for big endian in the bcm63xx driver.
   - Multiple slave support for the mt8173
   - New driver for the auxiliary SPI controller in bcm2835 SoCs.
   - Support for Layerscale SoCs in the Freescale DSPI driver"

* tag 'spi-v4.4' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi: (87 commits)
  spi: pxa2xx: Rework self-initiated platform data creation for non-ACPI
  spi: pxa2xx: Add support for Intel Broxton
  spi: pxa2xx: Detect number of enabled Intel LPSS SPI chip select signals
  spi: pxa2xx: Add output control for multiple Intel LPSS chip selects
  spi: pxa2xx: Use LPSS prefix for defines that are Intel LPSS specific
  spi: Add DSPI support for layerscape family
  spi: ti-qspi: improve ->remove() callback
  spi/spi-xilinx: Fix race condition on last word read
  spi: Drop owner assignment from spi_drivers
  spi: Add THIS_MODULE to spi_driver in SPI core
  spi: Setup the master controller driver before setting the chipselect
  spi: dw: replace magic constant by DW_SPI_DR
  spi: mediatek: mt8173 spi multiple devices support
  spi: mediatek: handle controller_data in mtk_spi_setup
  spi: mediatek: remove mtk_spi_config
  spi: mediatek: Update document devicetree bindings to support multiple devices
  spi: fix kernel-doc warnings about missing return desc in spi.c
  spi: fix kernel-doc warnings about missing return desc in spi.h
  spi: pxa2xx: Align a few defines
  spi: pxa2xx: Save other reg_cs_ctrl bits when configuring chip select
  ...