linux-stable.git/drivers/tty/serial, branch v3.18.3

serial: samsung: wait for transfer completion before clock disable

2015-01-16T14:59:52+00:00

commit 1ff383a4c3eda8893ec61b02831826e1b1f46b41 upstream.

This patch adds waiting until transmit buffer and shifter will be empty
before clock disabling.

Without this fix it's possible to have clock disabled while data was
not transmited yet, which causes unproper state of TX line and problems
in following data transfers.

Signed-off-by: Robert Baldyga 
Signed-off-by: Greg Kroah-Hartman

tty: serial: men_z135_uart: Add terminating entry for men_z135_ids

2015-01-16T14:59:52+00:00

commit 6b1f40cf4840820051d69646af0b6503878cb1bc upstream.

The mcb_device_id table is supposed to be zero-terminated.

Signed-off-by: Axel Lin 
Signed-off-by: Greg Kroah-Hartman

Revert "serial: of-serial: add PM suspend/resume support"

2014-11-25T20:46:39+00:00

This reverts commit 2dea53bf57783f243c892e99c10c6921e956aa7e.

Turns out to be broken :(

Cc: Jingchang Lu 
Cc: Arnd Bergmann 
Signed-off-by: Greg Kroah-Hartman

serial: of-serial: fix uninitialized kmalloc variable

2014-11-06T04:12:02+00:00

The info pointer points to an uninitialized kmalloced space.
If a device doesn't have clk property, then info->clk may
have unpredicated value and cause call trace. So use kzalloc
to make sure it is NULL initialized.

Signed-off-by: Jingchang Lu 
Acked-by: Arnd Bergmann

tty: serial: 8250_mtk: Fix quot calculation

2014-11-06T04:12:02+00:00

The calculation of value quot for highspeed register set to three
was wrong. This patch fixes the calculation so that the serial port
for baudrates bigger then 576000 baud is working correctly.

Signed-off-by: Matthias Brugger 
Signed-off-by: Greg Kroah-Hartman

serial: Fix divide-by-zero fault in uart_get_divisor()

2014-11-06T00:14:09+00:00

uart_get_baud_rate() will return baud == 0 if the max rate is set
to the "magic" 38400 rate and the SPD_* flags are also specified.
On the first iteration, if the current baud rate is higher than the
max, the baud rate is clamped at the max (which in the degenerate
case is 38400). On the second iteration, the now-"magic" 38400 baud
rate selects the possibly higher alternate baud rate indicated by
the SPD_* flag. Since only two loop iterations are performed, the
loop is exited, a kernel WARNING is generated and a baud rate of
0 is returned.

Reproducible with:
 setserial /dev/ttyS0 spd_hi base_baud 38400

Only perform the "magic" 38400 -> SPD_* baud transform on the first
loop iteration, which prevents the degenerate case from recognizing
the clamped baud rate as the "magic" 38400 value.

Reported-by: Robert Święcki 
Cc:  # all
Signed-off-by: Peter Hurley 
Signed-off-by: Greg Kroah-Hartman

Merge branch 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma

2014-10-19T01:11:04+00:00

Pull slave-dmaengine updates from Vinod Koul:
 "For dmaengine contributions we have:
   - designware cleanup by Andy
   - my series moving device_control users to dmanegine_xxx APIs for
     later removal of device_control API
   - minor fixes spread over drivers mainly mv_xor, pl330, mmp, imx-sdma
     etc"

* 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma: (60 commits)
  serial: atmel: add missing dmaengine header
  dmaengine: remove FSLDMA_EXTERNAL_START
  dmaengine: freescale: remove FSLDMA_EXTERNAL_START control method
  carma-fpga: move to fsl_dma_external_start()
  carma-fpga: use dmaengine_xxx() API
  dmaengine: freescale: add and export fsl_dma_external_start()
  dmaengine: add dmaengine_prep_dma_sg() helper
  video: mx3fb: use dmaengine_terminate_all() API
  serial: sh-sci: use dmaengine_terminate_all() API
  net: ks8842: use dmaengine_terminate_all() API
  mtd: sh_flctl: use dmaengine_terminate_all() API
  mtd: fsmc_nand: use dmaengine_terminate_all() API
  V4L2: mx3_camer: use dmaengine_pause() API
  dmaengine: coh901318: use dmaengine_terminate_all() API
  pata_arasan_cf: use dmaengine_terminate_all() API
  dmaengine: edma: check for echan->edesc => NULL in edma_dma_pause()
  dmaengine: dw: export probe()/remove() and Co to users
  dmaengine: dw: enable and disable controller when needed
  dmaengine: dw: always export dw_dma_{en,dis}able
  dmaengine: dw: introduce dw_dma_on() helper
  ...

serial: atmel: add missing dmaengine header

2014-10-16T08:38:05+00:00

The atmel serial driver uses dmaengine APIs but never included the dmaengine
header as it was getting inculded thru one of driver headers.

commit 3d588f83e4d6a5230d9094b97d38621cbaa9a972 - "dmaengine: dw: split
dma-dw.h to platform and private parts" broke this as it moved headers
around.  Fix this by doing the right thing to include the dmaengine header

Reported-by: kbuild test robot 
Fixes: 08f738be88bb (serial: at91: add tx dma support)
Acked-by: Greg Kroah-Hartman 
Signed-off-by: Vinod Koul

Merge branch 'topic/dma_control_cleanup_acks' into for-linus

2014-10-15T16:08:49+00:00

serial: sh-sci: use dmaengine_terminate_all() API

2014-10-15T16:01:00+00:00

The drivers should use dmaengine_terminate_all() API instead of
accessing the device_control which will be deprecated soon

Acked-by: Greg Kroah-Hartman 
Signed-off-by: Vinod Koul