NeilBrown bf732c6bff staging: mt7621-spi: revised half-duplex message handling ... The mt7621 SPI engine has a 32 byte buffer and the driver currently only allows 32-byte read requests and 36 bytes writes (there is a 4byte op/addr buffer). This is an unnecessary limitation. As the SPI clock is controlled by the host it is quite acceptable to send a larger message in multiple smaller transactions. As long as Chip Select is kept asserted the whole time, the SPI engine can be run multiple times for a single SPI message. This patch factors out the transaction logic and calls for each transfer in the message. A write transfer might leave bytes in the buffer to be combined with a following read transfer, as this is a common pattern. With this in place, we can remove the current max_transfer_size limit. In testing, this increases the read throughput for a NOR flash chip from 1.4MB/s to 2.3MB/s, a 50% improvement. Signed-off-by: NeilBrown <neil@brown.name> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2018-06-17 09:05:11 +02:00
..
accessibility
acpi	pwm: Changes for v4.18-rc1	2018-06-14 16:25:43 +09:00
amba
android
ata
atm
auxdisplay
base	Additional power management updates for 4.18-rc1	2018-06-13 07:24:18 -07:00
bcma
block	The main piece is a set of libceph changes that revamps how OSD	2018-06-15 07:24:58 +09:00
bluetooth
bus	- Error path bug fix for overflow tests (Dan)	2018-06-12 18:28:00 -07:00
cdrom
char	docs: Fix some broken references	2018-06-15 18:10:01 -03:00
clk	docs: Fix some broken references	2018-06-15 18:10:01 -03:00
clocksource
connector
cpufreq	Additional power management updates for 4.18-rc1	2018-06-13 07:24:18 -07:00
cpuidle
crypto
dax
dca
devfreq
dio
dma	fix a series of Documentation/ broken file name references	2018-06-15 18:10:01 -03:00
dma-buf
edac
eisa
extcon
firewire
firmware	Merge branch 'akpm' (patches from Andrew)	2018-06-15 08:51:42 +09:00
fmc
fpga
fsi
gpio
gpu	Solve a series of broken links for files under Documentation:	2018-06-17 05:25:18 +09:00
hid	docs: fix broken references with multiple hints	2018-06-15 18:10:01 -03:00
hsi
hv
hwmon
hwspinlock
hwtracing
i2c	Merge branch 'i2c/for-4.18' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux	2018-06-14 16:21:46 +09:00
ide
idle
iio
infiniband	treewide: Use array_size() in kvzalloc_node()	2018-06-12 16:19:22 -07:00
input	docs: Fix some broken references	2018-06-15 18:10:01 -03:00
iommu	- Error path bug fix for overflow tests (Dan)	2018-06-12 18:28:00 -07:00
ipack
irqchip
isdn
leds
lightnvm	docs: Fix some broken references	2018-06-15 18:10:01 -03:00
macintosh
mailbox
mcb
md	docs: Fix some broken references	2018-06-15 18:10:01 -03:00
media	Solve a series of broken links for files under Documentation:	2018-06-17 05:25:18 +09:00
memory	- Error path bug fix for overflow tests (Dan)	2018-06-12 18:28:00 -07:00
memstick
message
mfd	Merge branch 'i2c/for-4.18' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux	2018-06-14 16:21:46 +09:00
misc	Merge branch 'i2c/for-4.18' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux	2018-06-14 16:21:46 +09:00
mmc
mtd	- Error path bug fix for overflow tests (Dan)	2018-06-12 18:28:00 -07:00
mux
net	Solve a series of broken links for files under Documentation:	2018-06-17 05:25:18 +09:00
nfc
ntb	- Error path bug fix for overflow tests (Dan)	2018-06-12 18:28:00 -07:00
nubus
nvdimm
nvme	Merge branch 'nvme-4.18' of git://git.infradead.org/nvme into for-linus	2018-06-15 08:11:05 -06:00
nvmem
of	- Error path bug fix for overflow tests (Dan)	2018-06-12 18:28:00 -07:00
opp
oprofile
parisc
parport	docs: Fix some broken references	2018-06-15 18:10:01 -03:00
pci	- Error path bug fix for overflow tests (Dan)	2018-06-12 18:28:00 -07:00
pcmcia
perf
phy
pinctrl
platform	fix a series of Documentation/ broken file name references	2018-06-15 18:10:01 -03:00
pnp
power
powercap
pps
ps3
ptp
pwm	pwm: Changes for v4.18-rc1	2018-06-14 16:25:43 +09:00
rapidio
ras
regulator
remoteproc	treewide: use PHYS_ADDR_MAX to avoid type casting ULLONG_MAX	2018-06-15 07:55:25 +09:00
reset	- Error path bug fix for overflow tests (Dan)	2018-06-12 18:28:00 -07:00
rpmsg
rtc
s390	treewide: Use array_size() in vzalloc()	2018-06-12 16:19:22 -07:00
sbus	fix a series of Documentation/ broken file name references	2018-06-15 18:10:01 -03:00
scsi	SCSI fixes on 20180613	2018-06-14 16:35:32 +09:00
sfi
sh
siox
slimbus
sn
soc	treewide: use PHYS_ADDR_MAX to avoid type casting ULLONG_MAX	2018-06-15 07:55:25 +09:00
soundwire	docs: Fix more broken references	2018-06-15 18:11:26 -03:00
spi
spmi
ssb
staging	staging: mt7621-spi: revised half-duplex message handling	2018-06-17 09:05:11 +02:00
target	treewide: Use array_size() in vzalloc()	2018-06-12 16:19:22 -07:00
tc
tee
thermal	- Error path bug fix for overflow tests (Dan)	2018-06-12 18:28:00 -07:00
thunderbolt
tty	vfs/y2038: inode timestamps conversion to timespec64	2018-06-15 07:31:07 +09:00
uio
usb	vfs/y2038: inode timestamps conversion to timespec64	2018-06-15 07:31:07 +09:00
uwb
vfio
vhost	virtio, vhost: features, fixes	2018-06-16 06:35:02 +09:00
video	Solve a series of broken links for files under Documentation:	2018-06-17 05:25:18 +09:00
virt
virtio	virtio, vhost: features, fixes	2018-06-16 06:35:02 +09:00
visorbus
vlynq
vme
w1
watchdog
xen
zorro
Kconfig
Makefile