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alistair23-linux/drivers/tty/serial
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Geert Uytterhoeven bf903c0c6d serial_core: Fix pm imbalance on unbind 
When a serial port is closed, uart_close() takes care of shutting down the
hardware, and powering it down.

When a serial port is unbound while in use, uart_close() bypasses all of
this, as this is supposed to be done through uart_hangup() (invoked via
tty_vhangup() in uart_remove_one_port()).

However, uart_hangup() does not set the hardware's power state, leaving it
powered up.  This may also lead to unbounded nesting counts in clock and
power management, depending on their internal implementation.

Make sure to power down the port in uart_hangup(), except when the port is
used as a serial console.

For serial consoles, this operation must be postponed until after the port
becomes completely unused. This case is not fixed yet, as it depends on a
(future) fix for the tty->count vs. port->count imbalance on failed
uart_open().

After this, the module clock used by the sh-sci driver is disabled on
unbind while the serial port is in use.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 		2014-04-16 14:19:13 -07:00
..
8250 serial: 8250: Clean up the locking for -rt 2014-03-08 22:24:53 -08:00
cpm_uart tty: delete non-required instances of include <linux/init.h> 2014-01-07 17:05:21 -08:00
jsm TTY: jsm, remove superfluous check 2013-03-18 16:17:20 -07:00
21285.c TTY: switch tty_flip_buffer_push 2013-01-15 22:30:15 -08:00
68328serial.c Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu 2013-05-10 07:22:35 -07:00
Kconfig serial: timberdale: Depend on X86_32 2014-04-16 14:17:44 -07:00
Makefile serial: Remove old SC26XX driver 2013-12-19 12:34:30 -08:00
altera_jtaguart.c ARM: SoC DT updates for 3.12 2013-09-06 13:26:27 -07:00
altera_uart.c ARM: SoC DT updates for 3.12 2013-09-06 13:26:27 -07:00
amba-pl010.c serial: pl010: Convert to modern PM ops 2013-12-08 17:09:07 -08:00
amba-pl011.c serial: pl011: change Rx burst size to half of trigger level 2014-04-16 14:17:44 -07:00
apbuart.c tty: serial: apbuart: drop uart_port->lock before calling tty_flip_buffer_push() 2013-08-27 16:17:33 -07:00
apbuart.h
…
ar933x_uart.c tty: ar933x_uart: add device tree support and binding documentation 2013-08-30 14:11:27 -07:00
arc_uart.c serial: arc_uart: Remove casting the return value which is a void pointer 2013-09-26 14:29:58 -07:00
atmel_serial.c ARM: SoC: cleanups for 3.15 2014-04-05 13:51:19 -07:00
bcm63xx_uart.c tty: serial: bcm63xx_uart: add support for DT probing 2014-02-28 16:27:18 -08:00
bfin_sport_uart.c serial: bfin_sport_uart: Remove casting the return value which is a void pointer 2013-09-26 14:29:58 -07:00
bfin_sport_uart.h
…
bfin_uart.c tty: Remove unnecessary semicolons 2013-10-16 13:08:16 -07:00
clps711x.c Revert "serial: clps711x: Give a chance to perform useful tasks during wait loop" 2014-04-16 14:17:44 -07:00
crisv10.c tty: serial: crisv10: Drop remaining code for CRISv10 CPU simulator 2014-02-15 12:16:21 -08:00
crisv10.h crisv10: use counts from tty_port 2013-03-18 16:26:33 -07:00
dz.c TTY: switch tty_flip_buffer_push 2013-01-15 22:30:15 -08:00
dz.h
…
efm32-uart.c serial: efm32: use $vendor,$device scheme for compatible string 2014-04-16 14:17:43 -07:00
fsl_lpuart.c serial: fsl_lpuart: add DMA support 2014-02-18 12:50:26 -08:00
icom.c serial: icom: dereference after free in load_code() 2013-12-08 17:16:05 -08:00
icom.h
…
ifx6x60.c serial: ifx6x60: Remove casting the return value which is a void pointer 2013-09-26 14:29:58 -07:00
ifx6x60.h serial:ifx6x60:Prevent data transfer when IFX6x60 port is shutdown 2012-11-01 08:50:01 -07:00
imx.c serial: imx: Remove init() and exit() platform callbacks 2014-02-28 16:36:45 -08:00
ioc3_serial.c TTY: switch tty_flip_buffer_push 2013-01-15 22:30:15 -08:00
ioc4_serial.c serial: ioc4_serial: Staticize ioc4_serial_attach_one() 2013-08-12 11:35:32 -07:00
ip22zilog.c tty: Remove unnecessary semicolons 2013-10-16 13:08:16 -07:00
ip22zilog.h
…
kgdb_nmi.c tty: delete non-required instances of include <linux/init.h> 2014-01-07 17:05:21 -08:00
kgdboc.c treewide: Convert retrun typos to return 2013-09-04 12:26:36 +02:00
lantiq.c serial: MIPS: lantiq: fix clock error check 2013-08-12 11:37:48 -07:00
lpc32xx_hs.c tty: serial: lpc32xx_hs: drop uart_port->lock before calling tty_flip_buffer_push() 2013-08-27 16:17:34 -07:00
m32r_sio.c tty: serial: m32r_sio: drop uart_port->lock before calling tty_flip_buffer_push() 2013-08-27 16:17:34 -07:00
m32r_sio.h
…
m32r_sio_reg.h
…
max310x.c serial: max310x: Add missing #include <linux/uaccess.h> 2014-03-17 16:13:23 -07:00
max3100.c serial: use dev_get_platdata() 2013-07-31 17:56:15 -07:00
mcf.c tty: serial: mcf: drop uart_port->lock before calling tty_flip_buffer_push() 2013-08-27 16:17:34 -07:00
mfd.c serial: mfd: Staticize local symbols 2013-10-29 16:34:11 -07:00
mpc52xx_uart.c serial: mpc512x: setup the PSC FIFO clock as well 2014-01-12 18:53:05 +01:00
mpsc.c serial: mpsc: Remove casting the return value which is a void pointer 2013-09-26 14:29:58 -07:00
mrst_max3110.c mrst_max3110: fix unbalanced IRQ issue during resume 2013-10-29 16:26:54 -07:00
mrst_max3110.h
…
msm_serial.c msm_serial: Add support for poll_{get,put}_char() 2014-02-12 11:34:23 -08:00
msm_serial.h msm_serial: Add support for poll_{get,put}_char() 2014-02-12 11:34:23 -08:00
msm_serial_hs.c serial: use dev_get_platdata() 2013-07-31 17:56:15 -07:00
msm_smd_tty.c TTY: msm_smd_tty, clean up activate/shutdown 2013-03-18 16:19:44 -07:00
mux.c TTY: switch tty_flip_buffer_push 2013-01-15 22:30:15 -08:00
mxs-auart.c tty: serial: mxs-auart: Check the return value from clk_prepare_enable() 2013-12-08 17:14:58 -08:00
netx-serial.c tty: serial: netx: drop uart_port->lock before calling tty_flip_buffer_push() 2013-08-27 16:17:34 -07:00
nwpserial.c tty: serial: nwpserial: drop uart_port->lock before calling tty_flip_buffer_push() 2013-08-27 16:17:35 -07:00
of_serial.c tty: delete non-required instances of include <linux/init.h> 2014-01-07 17:05:21 -08:00
omap-serial.c serial: omap: free the wakeup settings in remove 2014-04-16 14:15:01 -07:00
pch_uart.c serial: pch_uart: Fix build warning when CONFIG_DEBUG_FS=n 2014-02-13 09:17:31 -08:00
pmac_zilog.c TTY: pmac_zilog, check existence of ports in pmz_console_init() 2013-11-25 08:54:25 -08:00
pmac_zilog.h
…
pnx8xxx_uart.c tty: serial: pnx8xxx: drop uart_port->lock before calling tty_flip_buffer_push() 2013-08-27 16:17:35 -07:00
pxa.c serial: pxa: Staticize local symbols 2013-08-12 11:10:16 -07:00
rp2.c tty: remove DEFINE_PCI_DEVICE_TABLE macro 2013-12-08 17:09:07 -08:00
sa1100.c serial: sa1100: delete .set_wake callback 2013-10-16 13:16:18 -07:00
samsung.c serial: samsung: Move uart_register_driver call to device probe 2014-02-13 10:32:59 -08:00
samsung.h serial: samsung: Remove casting the return value which is a void pointer 2013-09-26 14:29:59 -07:00
sb1250-duart.c TTY: switch tty_flip_buffer_push 2013-01-15 22:30:15 -08:00
sccnxp.c serial: sccnxp: missing uart_unregister_driver() on error in sccnxp_probe() 2013-09-26 15:44:45 -07:00
serial-tegra.c serial: tegra: convert to standard DMA DT bindings 2013-12-11 16:44:35 -07:00
serial_core.c serial_core: Fix pm imbalance on unbind 2014-04-16 14:19:13 -07:00
serial_ks8695.c TTY: switch tty_flip_buffer_push 2013-01-15 22:30:15 -08:00
serial_txx9.c serial: txx9: remove unnecessary pci_set_drvdata() 2013-09-26 15:41:38 -07:00
sh-sci.c TTY/Serial driver update for 3.15-rc1 2014-04-01 16:55:57 -07:00
sh-sci.h serial: sh-sci: Move overrun_bit and error_mask fields out of pdata 2013-12-24 11:17:48 +09:00
sirfsoc_uart.c serial: sirf: move to use generic dma dt-binding to get dma channels 2014-02-13 10:36:25 -08:00
sirfsoc_uart.h serial: sirf: move to use generic dma dt-binding to get dma channels 2014-02-13 10:36:25 -08:00
sn_console.c TTY: switch tty_flip_buffer_push 2013-01-15 22:30:15 -08:00
st-asc.c serial: st-asc: Fix SysRq char handling 2014-04-16 14:17:44 -07:00
suncore.c
…
sunhv.c sparc: serial: Clean up the locking for -rt 2014-03-06 16:32:25 -05:00
sunsab.c sparc: serial: Clean up the locking for -rt 2014-03-06 16:32:25 -05:00
sunsab.h
…
sunsu.c sparc: serial: Clean up the locking for -rt 2014-03-06 16:32:25 -05:00
sunzilog.c sparc: serial: Clean up the locking for -rt 2014-03-06 16:32:25 -05:00
sunzilog.h
…
tilegx.c tilegx: Add tty serial support for TILE-Gx on-chip UART 2013-09-03 14:50:40 -04:00
timbuart.c serial: timbuart: Staticize local symbols 2013-08-12 11:35:31 -07:00
timbuart.h
…
uartlite.c tty: serial: uartlite: Support uartlite on big and little endian systems 2013-02-13 08:38:45 -08:00
ucc_uart.c DeviceTree updates for 3.13. This is a bit larger pull request than 2013-11-12 16:52:17 +09:00
vr41xx_siu.c serial: use dev_get_platdata() 2013-07-31 17:56:15 -07:00
vt8500_serial.c serial: vt8500: add missing braces 2013-10-16 13:22:16 -07:00
xilinx_uartps.c tty: xuartps: Properly guard sysrq specific code 2013-12-17 16:02:25 -08:00
zs.c TTY: switch tty_flip_buffer_push 2013-01-15 22:30:15 -08:00
zs.h
…