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d0fc91d67c
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Kashyap Desai d0fc91d67c scsi: megaraid_sas: Send SYNCHRONIZE_CACHE for VD to firmware 
Until now the megaraid_sas driver has reported successful completion on
SYNCHRONIZE_CACHE commands without sending them down to the controller.
The controller firmware has been responsible for taking care of flushing
disk caches for all drives that belong to a Virtual Disk at the time of
system reboot/shutdown.

There may have been a reason to avoid sending SYNCHRONIZE_CACHE to a VD
in the past but that no longer appears to be valid.

Older versions of MegaRaid firmware (Gen2 and Gen2.5) set the WCE bit
for Virtual Disks but the firmware does not report correct completion
status for a SYNCHRONIZE_CACHE command. As a result, we must use another
method to identify whether it is safe to send the command to the
controller. We use the canHandleSyncCache firmware flag in the scratch
pad register at offset 0xB4.

New SYNCHRONIZE_CACHE behavior:

IF 'JBOD'

	Driver sends SYNCHRONIZE_CACHE command to the firmware
	Firmware sends SYNCHRONIZE_CACHE to drive
	Firmware obtains status from drive and returns same status back to driver

ELSEIF 'VirtualDisk'

	IF firmware supports new API bit called canHandleSyncCache
		Driver sends SYNCHRONIZE_CACHE command to the firmware
		Firmware does not send SYNCHRONIZE_CACHE to drives
		Firmware returns SUCCESS
	ELSE
		Driver does not send SYNCHRONIZE_CACHE command to the firmware
		Driver return SUCCESS for that command
	ENDIF
ENDIF

[mkp: edited patch description]

Signed-off-by: Kashyap Desai <kashyap.desai@broadcom.com>
Signed-off-by: Sumit Saxena <sumit.saxena@broadcom.com>
Reviewed-by: Tomas Henzl <thenzl@redhat.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Ewan D. Milne <emilne@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2016-11-08 17:39:35 -05:00
..
accessibility
acpi Merge branches 'acpica-fixes', 'acpi-pci-fixes' and 'acpi-apei-fixes' 2016-10-29 01:58:03 +02:00
amba
android ANDROID: binder: Clear binder and cookie when setting handle in flat binder struct 2016-10-24 19:37:48 +02:00
ata ahci: fix the single MSI-X case in ahci_init_one 2016-10-25 11:43:07 -04:00
atm
auxdisplay auxdisplay: img-ascii-lcd: driver for simple ASCII LCD displays 2016-10-06 17:03:41 +02:00
base driver core: Make Kconfig text for DEBUG_TEST_DRIVER_REMOVE stronger 2016-10-27 17:47:12 +02:00
bcma
block scsi: cciss: replace custom function to hexdump 2016-11-08 17:29:57 -05:00
bluetooth Bluetooth: btwilink: Fix probe return value 2016-10-20 10:14:49 +02:00
bus bus: qcom-ebi2: depend on ARCH_QCOM or COMPILE_TEST 2016-10-17 13:46:09 -07:00
cdrom
char virtio: tests, fixes and cleanups 2016-11-01 16:56:05 -06:00
clk clk: at91: Fix a return value in case of error 2016-10-20 16:37:56 -07:00
clocksource Revert "clocksource/drivers/timer_sun5i: Replace code by clocksource_mmio_init" 2016-10-20 21:58:58 +02:00
connector
cpufreq Merge branches 'pm-cpufreq-fixes' and 'pm-sleep-fixes' 2016-10-29 01:29:17 +02:00
cpuidle Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2016-10-15 09:26:12 -07:00
crypto Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2016-10-10 14:04:16 -07:00
dax device-dax: fix percpu_ref_exit ordering 2016-10-27 17:04:05 -07:00
dca
devfreq PM / devfreq: Skip status update on uninitialized previous_freq 2016-10-11 00:01:20 +02:00
dio
dma dmaengine updates for 4.8-rc1 2016-10-06 17:13:54 -07:00
dma-buf Merge tag 'drm-for-v4.9' of git://people.freedesktop.org/~airlied/linux 2016-10-11 18:12:22 -07:00
edac * Altera Arria10 enablement of NAND, DMA, USB, QSPI and SD-MMC FIFO 2016-10-04 12:06:26 -07:00
eisa
extcon extcon: qcom-spmi-misc: Sync the extcon state on interrupt 2016-10-26 16:04:29 +09:00
firewire firewire: net: fix fragmented datagram_size off-by-one 2016-11-03 14:46:39 +01:00
firmware efi/arm: Fix absolute relocation detection for older toolchains 2016-10-19 14:49:44 +02:00
fmc
fpga
gpio gpio/mvebu: Use irq_domain_add_linear 2016-11-01 19:31:49 +01:00
gpu Merge tag 'drm-intel-fixes-2016-11-01' of git://anongit.freedesktop.org/drm-intel into drm-fixes 2016-11-03 10:18:20 +10:00
hid HID: sensor: fix attributes in HID sensor interface 2016-11-05 16:56:09 +01:00
hsi
hv hv: do not lose pending heartbeat vmbus packets 2016-10-25 08:52:10 +02:00
hwmon hwmon: (core) fix resource leak on devm_kcalloc failure 2016-10-24 06:05:13 -07:00
hwspinlock
hwtracing
i2c i2c: core: fix NULL pointer dereference under race condition 2016-11-04 20:36:58 +01:00
ide
idle nmi_backtrace: generate one-line reports for idle cpus 2016-10-07 18:46:30 -07:00
iio First set of IIO fixes for the 4.9 cycle. 2016-10-24 10:50:13 +02:00
infiniband Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-10-29 20:33:20 -07:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2016-11-05 11:26:11 -07:00
iommu iommu/vt-d: Fix dead-locks in disable_dmar_iommu() path 2016-11-08 15:08:26 +01:00
ipack ipack: print a hex number after a 0x prefix 2016-10-27 18:43:43 -07:00
irqchip GIC updates for Linux 4.9-rc2 2016-10-21 21:40:29 +02:00
isdn
leds
lguest
lightnvm Merge branch 'for-4.9/block' of git://git.kernel.dk/linux-block 2016-10-07 14:42:05 -07:00
macintosh
mailbox Merge branch 'mailbox-for-next' of git://git.linaro.org/landing-teams/working/fujitsu/integration 2016-10-06 17:36:53 -07:00
mcb
md Merge tag 'md/4.9-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md 2016-11-05 11:34:07 -07:00
media media fixes for v4.9-rc4 2016-11-05 11:15:09 -07:00
memory ARM: SoC driver updates for v4.9 2016-10-07 21:23:40 -07:00
memstick memstick: rtsx_usb_ms: Manage runtime PM when accessing the device 2016-10-17 15:43:05 +02:00
message scsi: fusion: print lan address via %pMR 2016-11-08 17:29:57 -05:00
mfd - Core Frameworks 2016-10-07 08:35:35 -07:00
misc Char/Misc driver fixes for 4.9-rc3 2016-10-29 11:19:02 -07:00
mmc mmc: sdhci-msm: Fix error return code in sdhci_msm_probe() 2016-10-27 09:43:01 +02:00
mtd MTD updates for 4.9-rc4: 2016-11-05 10:52:29 -07:00
net Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-10-29 20:33:20 -07:00
nfc
ntb
nubus
nvdimm nvdimm: make CONFIG_NVDIMM_DAX 'bool' 2016-10-27 16:16:21 -07:00
nvme Merge branch 'for-linus' of git://git.kernel.dk/linux-block 2016-10-21 10:54:01 -07:00
nvmem ARM: SoC driver updates for v4.9 2016-10-07 21:23:40 -07:00
of Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2016-10-15 09:26:12 -07:00
oprofile Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2016-10-10 20:16:43 -07:00
parisc
parport
pci pci-v4.9-fixes-2 2016-11-05 11:11:31 -07:00
pcmcia
perf perf: xgene: Remove bogus IS_ERR() check 2016-10-17 15:50:07 +01:00
phy
pinctrl pinctrl: intel: Only restore pins that are used by the driver 2016-10-18 14:38:16 +02:00
platform platform-drivers-x86 for 4.9-2 2016-10-19 11:45:06 -07:00
pnp
power power supply and reset changes for the v4.9 series 2016-10-06 18:21:15 -07:00
powercap
pps pps: kc: fix non-tickless system config dependency 2016-10-11 15:06:32 -07:00
ps3
ptp drivers/ptp: Fix kernel memory disclosure 2016-10-13 10:20:06 -04:00
pwm
rapidio mm: replace get_user_pages() write/force parameters with gup_flags 2016-10-19 08:11:43 -07:00
ras
regulator regulator: core: silence warning: "VDD1: ramp_delay not set" 2016-10-28 18:22:40 +01:00
remoteproc rpmsg updates for v4.9 2016-10-06 17:03:49 -07:00
reset reset: uniphier: rename MIO reset to SD reset for Pro5, PXs2, LD20 SoCs 2016-10-22 18:31:42 +09:00
rpmsg
rtc RTC for 4.9 2016-10-14 13:13:44 -07:00
s390 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux 2016-10-27 14:16:30 -07:00
sbus
scsi scsi: megaraid_sas: Send SYNCHRONIZE_CACHE for VD to firmware 2016-11-08 17:39:35 -05:00
sfi
sh
sn
soc powerpc updates for 4.9 #2 2016-10-14 11:07:42 -07:00
spi Merge remote-tracking branches 'spi/fix/dt', 'spi/fix/fsl-dspi' and 'spi/fix/fsl-espi' into spi-linus 2016-10-29 12:51:55 -06:00
spmi
ssb
staging media fixes for v4.9-rc4 2016-11-05 11:15:09 -07:00
target scsi: libfc: Replace ->seq_release callback with function call 2016-11-08 17:29:56 -05:00
tc
thermal thermal/powerclamp: correct cpu support check 2016-10-20 14:15:44 +08:00
thunderbolt
tty tty: serial_core: fix NULL struct tty pointer access in uart_write_wakeup 2016-10-28 08:13:07 -04:00
uio
usb usb: chipidea: host: fix NULL ptr dereference during shutdown 2016-10-25 16:14:32 +08:00
uwb
vfio vfio/pci: Fix integer overflows, bitmask check 2016-10-26 13:49:29 -06:00
vhost
video Merge branch 'gup_flag-cleanups' 2016-10-19 08:39:47 -07:00
virt mm: replace get_user_pages() write/force parameters with gup_flags 2016-10-19 08:11:43 -07:00
virtio virtio_ring: mark vring_dma_dev inline 2016-10-31 00:40:08 +02:00
vlynq
vme vme: vme_get_size potentially returning incorrect value on failure 2016-10-28 08:25:18 -04:00
w1
watchdog Merge branches 'acpi-wdat' and 'acpi-cppc' 2016-10-21 22:24:23 +02:00
xen xen: fixes for 4.9-rc2 2016-10-24 19:52:24 -07:00
zorro
Kconfig
Makefile A small bug fix and a new driver for acting as an IPMI device. 2016-10-23 15:56:23 -07:00