linux-toradex.git, branch kk4.4.2_2.0.0-alpha

Merge remote-tracking branch 'fsl-linux-sdk/imx_3.10.31_1.1.0_alpha' into imx_3.10.y_android

2014-04-30T05:36:17+00:00

ENGR00311068 ASoC: fsl_hdmi: passthrough can't work for android

2014-04-30T05:14:18+00:00

Android need driver to export several kcontrol. "Support channels",
"Support Rates", "Support Formats".

Signed-off-by: Shengjiu Wang

serial: imx: Remove init() and exit() platform callbacks

2014-04-29T05:48:33+00:00

Signed-off-by: Alexander Shiyan 
Signed-off-by: Greg Kroah-Hartman 
Signed-off-by: Huang Shijie

serial: imx: Use dev_name() for request_irq() to distinguish UARTs

2014-04-29T05:48:32+00:00

Signed-off-by: Alexander Shiyan 
Signed-off-by: Greg Kroah-Hartman 
Signed-off-by: Huang Shijie

serial: imx: Use devm_ioremap_resource()

2014-04-29T05:48:32+00:00

Use devm_ioremap_resource() in order to make the code simpler and
it gives proper codes on errors.

Signed-off-by: Alexander Shiyan 
Signed-off-by: Greg Kroah-Hartman 
Signed-off-by: Huang Shijie

ENGR00310741-2 enable gpu low memory killer for 3.10 kernel.

2014-04-28T07:00:23+00:00

add CONFIG_GPU_LOW_MEMORY_KILLER to default config.

Signed-off-by: Xiaowen Liu

ENGR00310742 [#1087] fixed gpu database query failure

2014-04-28T14:23:01+00:00

this patch fix gpu database query failure with gmem_info

Date: Apr 28, 2014
Signed-off-by: Xianzhong 
Acked-by: Jason Liu
(cherry picked from commit e04a8681a977153c7adf34c36d7ee33218cfcab3)

bluetooth: hci_ldisc: fix deadlock condition

2014-04-28T06:28:41+00:00

LDISCs shouldn't call tty->ops->write() from within
->write_wakeup().

->write_wakeup() is called with port lock taken and
IRQs disabled, tty->ops->write() will try to acquire
the same port lock and we will deadlock.

Acked-by: Marcel Holtmann 
Reviewed-by: Peter Hurley 
Reported-by: Huang Shijie 
Signed-off-by: Felipe Balbi 
Tested-by: Andreas Bießmann 
Cc: stable 
Signed-off-by: Greg Kroah-Hartman 
Signed-off-by: Huang Shijie

ENGR00310741 enable gpu low memory killer for 3.10 kernel.

2014-04-28T06:25:24+00:00

rename CONFIG_ANDROID_RESERVED_MEMORY_ACCOUNT to CONFIG_GPU_LOW_MEMORY_KILLER.
refine gpu low memory killer code.
remove some unused code.
move CONFIG_GPU_LOW_MEMORY_KILLER to gpu-viv Kconfig.

Signed-off-by: Xiaowen Liu

tty_ldisc: add more limits to the @write_wakeup

2014-04-28T06:21:14+00:00

In the uart_handle_cts_change(), uart_write_wakeup() is called after
we call @uart_port->ops->start_tx().

The Documentation/serial/driver tells us:
-----------------------------------------------
  start_tx(port)
	Start transmitting characters.

	Locking: port->lock taken.
	Interrupts: locally disabled.
-----------------------------------------------

So when the uart_write_wakeup() is called, the port->lock is taken by
the upper. See the following callstack:

	|_ uart_write_wakeup
	   |_ tty_wakeup
	      |_ ld->ops->write_wakeup

With the port->lock held, we call the @write_wakeup. Some implemetation of
the @write_wakeup does not notice that the port->lock is held, and it still
tries to send data with uart_write() which will try to grab the prot->lock.
A dead lock occurs, see the following log caught in the Bluetooth by uart:

--------------------------------------------------------------------
BUG: spinlock lockup suspected on CPU#0, swapper/0/0
 lock: 0xdc3f4410, .magic: dead4ead, .owner: swapper/0/0, .owner_cpu: 0
CPU: 0 PID: 0 Comm: swapper/0 Tainted: G        W    3.10.17-16839-ge4a1bef #1320
[<80014cbc>] (unwind_backtrace+0x0/0x138) from [<8001251c>] (show_stack+0x10/0x14)
[<8001251c>] (show_stack+0x10/0x14) from [<802816ac>] (do_raw_spin_lock+0x108/0x184)
[<802816ac>] (do_raw_spin_lock+0x108/0x184) from [<806a22b0>] (_raw_spin_lock_irqsave+0x54/0x60)
[<806a22b0>] (_raw_spin_lock_irqsave+0x54/0x60) from [<802f5754>] (uart_write+0x38/0xe0)
[<802f5754>] (uart_write+0x38/0xe0) from [<80455270>] (hci_uart_tx_wakeup+0xa4/0x168)
[<80455270>] (hci_uart_tx_wakeup+0xa4/0x168) from [<802dab18>] (tty_wakeup+0x50/0x5c)
[<802dab18>] (tty_wakeup+0x50/0x5c) from [<802f81a4>] (imx_rtsint+0x50/0x80)
[<802f81a4>] (imx_rtsint+0x50/0x80) from [<802f88f4>] (imx_int+0x158/0x17c)
[<802f88f4>] (imx_int+0x158/0x17c) from [<8007abe0>] (handle_irq_event_percpu+0x50/0x194)
[<8007abe0>] (handle_irq_event_percpu+0x50/0x194) from [<8007ad60>] (handle_irq_event+0x3c/0x5c)
--------------------------------------------------------------------

This patch adds more limits to the @write_wakeup, the one who wants to
implemet the @write_wakeup should follow the limits which avoid the deadlock.

Signed-off-by: Huang Shijie 
Signed-off-by: Felipe Balbi 
Signed-off-by: Greg Kroah-Hartman