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Revision a99b646afa8a02571ea298bedca6592d818229cd authored by dingtianhong on 15 August 2017, 03:23:23 UTC, committed by David S. Miller on 15 August 2017, 05:14:50 UTC 
PCI: Disable PCIe Relaxed Ordering if unsupported
 
When bit4 is set in the PCIe Device Control register, it indicates
whether the device is permitted to use relaxed ordering.
On some platforms using relaxed ordering can have performance issues or
due to erratum can cause data-corruption. In such cases devices must avoid
using relaxed ordering.

The patch adds a new flag PCI_DEV_FLAGS_NO_RELAXED_ORDERING to indicate that
Relaxed Ordering (RO) attribute should not be used for Transaction Layer
Packets (TLP) targeted towards these affected root complexes.

This patch checks if there is any node in the hierarchy that indicates that
using relaxed ordering is not safe. In such cases the patch turns off the
relaxed ordering by clearing the capability for this device.

Signed-off-by: Casey Leedom <leedom@chelsio.com>
Signed-off-by: Ding Tianhong <dingtianhong@huawei.com>
Acked-by: Ashok Raj <ashok.raj@intel.com>
Acked-by: Alexander Duyck <alexander.h.duyck@intel.com>
Acked-by: Casey Leedom <leedom@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Raw File
Kconfig 
# ALSA PowerMac drivers

menuconfig SND_PPC
	bool "PowerPC sound devices"
	depends on PPC
	default y
	help
	  Support for sound devices specific to PowerPC architectures.

if SND_PPC

config SND_POWERMAC
	tristate "PowerMac (AWACS, DACA, Burgundy, Tumbler, Keywest)"
	depends on I2C && INPUT && PPC_PMAC
	select SND_PCM
	select SND_VMASTER
	help
	  Say Y here to include support for the integrated sound device.

	  To compile this driver as a module, choose M here: the module
	  will be called snd-powermac.

config SND_POWERMAC_AUTO_DRC
	bool "Toggle DRC automatically at headphone/line plug-in"
	depends on SND_POWERMAC
	default y
	help
	  Say Y here to enable the automatic toggle of DRC (dynamic
	  range compression) on Tumbler/Snapper.
	  If this feature is enabled, DRC is turned off when the
	  headphone/line jack is plugged, and turned on when unplugged.

	  Note that you can turn on/off DRC manually even without this
	  option.

config SND_PS3
	tristate "PS3 Audio support"
	depends on PS3_PS3AV
	select SND_PCM
	default m
	help
	  Say Y here to include support for audio on the PS3

	  To compile this driver as a module, choose M here: the module
	  will be called snd_ps3.

config SND_PS3_DEFAULT_START_DELAY
	int "Startup delay time in ms"
	depends on SND_PS3
	default "2000"

endif	# SND_PPC
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