Mark Brown 0461a41498 spi: Pump transfers inside calling context for spi_sync() ... If we are using the standard SPI message pump (which all drivers should be transitioning over to) then special case the message enqueue and instead of starting the worker thread to push messages to the hardware do so in the context of the caller if the controller is idle. This avoids a context switch in the common case where the controller has a single user in a single thread, for short PIO transfers there may be no need to context switch away from the calling context to complete the transfer. The code is a bit more complex than is desirable in part due to the need to handle drivers not using the standard queue and in part due to handling the various combinations of bus locking and asynchronous submission in interrupt context. It is still suboptimal since it will still wake the message pump for each transfer in order to schedule idling of the hardware and if multiple contexts are using the controller simultaneously a caller may end up pumping a message for some random other thread rather than for itself, and if the thread ends up deferring due to another context idling the hardware then it will just busy wait. It can, however, have the benefit of aggregating power up and down of the hardware when a caller performs a series of transfers back to back without any need for the use of spi_async(). Signed-off-by: Mark Brown <broonie@kernel.org>		2014-12-11 12:23:51 +00:00
..
accessibility	…
acpi	ACPI / video: update condition to check if device is in _DOD list	2014-12-01 02:09:18 +01:00
amba	PM / Domains: Move dev_pm_domain_attach|detach() to pm_domain.h	2014-09-30 01:16:44 +02:00
ata	ahci: disable MSI on SAMSUNG 0xa800 SSD	2014-12-04 13:18:55 -05:00
atm	solos-pci: fix error return code	2014-11-23 14:29:44 -05:00
auxdisplay	…
base	Merge branches 'pm-domains', 'pm-sleep' and 'pm-cpufreq'	2014-11-14 15:17:32 +01:00
bcma	bcma: add another PCI ID of device with BCM43228	2014-10-23 14:02:06 -04:00
block	zram: avoid kunmap_atomic() of a NULL pointer	2014-11-13 16:17:05 -08:00
bluetooth	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2014-10-13 11:28:42 +02:00
bus	ARM: SoC driver updates for 3.18	2014-10-08 17:37:16 -04:00
cdrom	…
char	virtio: bugfix for 3.18	2014-11-13 18:07:52 -08:00
clk	clk: pxa: fix pxa27x CCCR bit usage	2014-11-17 11:25:29 -08:00
clocksource	clockevent: sun4i: Fix race condition in the probe code	2014-11-19 10:43:51 +01:00
connector	…
cpufreq	cpufreq: Avoid crash in resume on SMP without OPP	2014-11-08 02:10:04 +01:00
cpuidle	Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus	2014-10-24 12:48:47 -07:00
crypto	crypto: caam - fix missing dma unmap on error path	2014-11-06 23:10:20 +08:00
dca	…
devfreq	PM / devfreq: exynos: Enable building exynos PPMU as module	2014-09-29 20:22:36 +09:00
dio	…
dma	Merge branch 'fixes' of git://git.infradead.org/users/vkoul/slave-dma	2014-11-21 16:24:27 -08:00
dma-buf	dma-buf: don't open-code atomic_long_read()	2014-10-09 02:39:07 -04:00
edac	e7xxx_edac: Report CE events properly	2014-10-22 22:59:00 +02:00
eisa	…
extcon	…
firewire	firewire: cdev: prevent kernel stack leaking into ioctl arguments	2014-11-14 12:10:13 +01:00
firmware	Merge branch 'x86-efi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2014-10-23 14:45:09 -07:00
fmc	…
gpio	This is the bulk of GPIO changes for the v3.18 development	2014-10-09 14:58:15 -04:00
gpu	Merge tag 'drm-intel-fixes-2014-12-04' of git://anongit.freedesktop.org/drm-intel into drm-fixes	2014-12-05 11:12:29 +10:00
hid	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid	2014-11-13 16:19:14 -08:00
hsi	…
hv	Drivers: hv: vmbus: Enable interrupt driven flow control	2014-09-23 23:31:22 -07:00
hwmon	hwmon: (g762) fix call to devm_hwmon_device_register_with_groups()	2014-11-19 14:06:47 -08:00
hwspinlock	…
i2c	i2c: cadence: Set the hardware time-out register to maximum value	2014-12-04 19:25:41 +01:00
ide	Merge branch 'for-3.18/drivers' of git://git.kernel.dk/linux-block	2014-10-18 12:12:45 -07:00
idle	…
iio	iio: accel: bmc150: set low default thresholds	2014-11-16 20:25:00 +00:00
infiniband	Merge git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending	2014-11-21 16:28:45 -08:00
input	drivers/input/evdev.c: don't kfree() a vmalloc address	2014-12-03 09:35:38 -08:00
iommu	IOMMU Updates for Linux v3.18	2014-10-15 07:23:49 +02:00
ipack	ipoctal: clear break interrupt as soon as it occurs	2014-09-23 23:26:42 -07:00
irqchip	irqchip: brcmstb-l2: Fix error handling of irq_of_parse_and_map	2014-11-26 06:28:42 +00:00
isdn	isdn/gigaset: fix usb_gigaset write_cmd result race	2014-10-14 15:05:35 -04:00
leds	Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds	2014-10-21 08:18:38 -07:00
lguest	…
macintosh	powerpc: Move via-cuda symbol exports next to function definitions	2014-09-25 23:14:37 +10:00
mailbox	Merge branch 'mailbox-for-linus' of git://git.linaro.org/landing-teams/working/fujitsu/integration	2014-10-21 11:21:19 -07:00
mcb	…
md	One fix for md for 3.18.	2014-11-16 15:34:31 -08:00
media	[media] rc-core: fix toggle handling in the rc6 decoder	2014-11-21 15:57:47 -02:00
memory	…
memstick	memstick: r592: fix build warnings for !PM_SLEEP	2014-10-14 02:18:22 +02:00
message	SCSI for-linus on 20141007	2014-10-07 21:29:18 -04:00
mfd	mfd: twl4030-power: Fix poweroff with PM configuration enabled	2014-11-10 15:22:04 +00:00
misc	cxl: Fix PSL error due to duplicate segment table entries	2014-10-28 19:52:52 +11:00
mmc	mmc: core: fix card detection regression	2014-11-05 09:28:48 +01:00
mtd	Three main MTD fixes for 3.18:	2014-11-02 14:45:52 -08:00
net	cxgb4: Fill in supported link mode for SFP modules	2014-12-02 19:57:49 -08:00
nfc	Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless	2014-10-07 14:48:29 -04:00
ntb	ntb: Adding split BAR support for Haswell platforms	2014-10-17 07:08:51 -04:00
nubus	…
of	of/fdt: memblock_reserve /memreserve/ regions in the case of partial overlap	2014-11-26 12:35:52 +00:00
oprofile	…
parisc	Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2014-10-13 16:23:15 +02:00
parport	parport: parport_pc: Implement architecture and device check to cut off false-positives	2014-09-23 23:14:28 -07:00
pci	PCI update for v3.18:	2014-12-03 14:24:10 -08:00
pcmcia	…
phy	phy: omap-usb2: Enable runtime PM of omap-usb2 phy properly	2014-11-05 14:34:06 -08:00
pinctrl	pinctrl: baytrail: show output gpio state correctly on Intel Baytrail	2014-10-28 11:16:26 +01:00
platform	platform: hp_accel: Add SERIO_I8042 as a dependency since it now includes i8042.h/serio.h	2014-11-10 21:16:15 -08:00
pnp	PNP: replace strnicmp with strncasecmp	2014-10-14 02:18:25 +02:00
power	power supply and reset changes for the v3.18-rc	2014-11-15 15:22:51 -08:00
powercap	…
pps	…
ps3	…
ptp	…
pwm	pwm: Changes for v3.18-rc1	2014-10-21 08:17:43 -07:00
rapidio	…
ras	…
regulator	Merge remote-tracking branches 'regulator/fix/max1586', 'regulator/fix/max77686', 'regulator/fix/max77693', 'regulator/fix/max77802', 'regulator/fix/max8860' and 'regulator/fix/s2mpa01' into regulator-linus	2014-11-05 14:59:25 +00:00
remoteproc	…
reset	…
rpmsg	…
rtc	drivers/rtc/rtc-bq32k.c: fix register value	2014-10-29 16:33:14 -07:00
s390	KVM: s390: virtio_ccw: remove unused variable	2014-11-03 10:43:00 +01:00
sbus	…
scsi	SCSI fixes on 20141128	2014-11-29 10:15:31 -08:00
sfi	…
sh	…
sn	…
soc	soc: versatile: Add terminating entry for realview_soc_of_match	2014-10-28 22:05:07 +01:00
spi	spi: Pump transfers inside calling context for spi_sync()	2014-12-11 12:23:51 +00:00
spmi	…
ssb	This is the bulk of GPIO changes for the v3.18 development	2014-10-09 14:58:15 -04:00
staging	staging: r8188eu: Add new device ID for DLink GO-USB-N150	2014-11-27 08:55:01 -08:00
target	target: return CONFLICT only when SA key unmatched	2014-11-02 22:04:57 -08:00
tc	…
thermal	thermal: Exynos: Deletion of unnecessary checks before two function calls	2014-11-21 15:20:17 -04:00
thunderbolt	…
tty	Revert "serial: of-serial: add PM suspend/resume support"	2014-11-25 12:46:39 -08:00
uio	uio: Export definition of struct uio_device	2014-10-02 21:35:54 -07:00
usb	usb-quirks: Add reset-resume quirk for MS Wireless Laser Mouse 6000	2014-11-24 17:01:55 -08:00
uwb	uwb: add an ASIE sysfs attribute to uwb_rc devices	2014-09-23 22:05:26 -07:00
vfio	IOMMU Updates for Linux v3.18	2014-10-15 07:23:49 +02:00
vhost	vhost-scsi: Take configfs group dependency during VHOST_SCSI_SET_ENDPOINT	2014-10-28 13:54:16 -07:00
video	Merge branch '3.18/omapdss-fixes' into 3.18/fbdev-fixes	2014-10-30 14:53:49 +02:00
virt	…
virtio	One cc: stable commit, the rest are a series of minor cleanups which have	2014-10-18 10:25:09 -07:00
vlynq	…
vme	…
w1	…
watchdog	watchdog: s3c2410_wdt: Fix the mask bit offset for Exynos7	2014-12-05 20:21:35 +01:00
xen	xen/pci: Allocate memory for physdev_pci_device_add's optarr	2014-10-23 16:24:02 +01:00
zorro	…
Kconfig	soc: ti: add Keystone Navigator QMSS driver	2014-09-24 09:49:14 -04:00
Makefile	…