linux/drivers/i2c
Jean Delvare a28e35171c i2c: piix4: Fix SB800 locking
We need a single mutex for all 4 shared SMBus ports on the SB800. A
per-port mutex doesn't protect us from concurrent access.

In theory the mutex should be per PCI device, however in practice we
know that there's only ever a single instance of the device in a given
system so we can use a global.

Also take the mutex during initialization, as first port may be already
in use when second port is initialized.

Signed-off-by: Jean Delvare <jdelvare@suse.de>
Tested-by: Christian Fetzer <fetzer.ch@gmail.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
[wsa: made mutex static]
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2016-01-26 06:46:26 +01:00
..
algos i2c: algo-bit: add I2C_AQ_NO_CLK_STRETCH 2015-11-30 18:37:25 +01:00
busses i2c: piix4: Fix SB800 locking 2016-01-26 06:46:26 +01:00
muxes i2c: mux: reg Change ioread endianness for readback 2015-09-03 11:58:42 +02:00
i2c-boardinfo.c
i2c-core.c i2c: always enable RuntimePM for the adapter device 2016-01-10 09:27:06 +01:00
i2c-core.h
i2c-dev.c i2c-dev: Fix I2C_SLAVE ioctl comment 2015-10-23 23:26:44 +02:00
i2c-mux.c i2c: add ACPI support for I2C mux ports 2015-10-25 15:49:46 +01:00
i2c-slave-eeprom.c i2c: Drop owner assignment from i2c_driver 2015-08-10 08:37:35 +02:00
i2c-smbus.c i2c: smbus: fix typo in commet 2015-06-01 08:41:26 +09:00
i2c-stub.c
Kconfig
Makefile