Techwizz/kernel-fxtec-pro1x
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kernel-fxtec-pro1x/drivers
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Joel Fernandes b267b3bc1e dma: edma: Leave linked to Null slot instead of DUMMY slot 
Dummy slot has been used as a way for missed-events not to be
reported as missing. This has been particularly troublesome for cases
where we might want to temporarily pause all incoming events.

For EDMA DMAC, there is no way to do any such pausing of events as
the occurence of the "next" event is not software controlled.
Using "edma_pause" in IRQ handlers doesn't help as by then the event
in concern from the slave is already missed.

Linking a dummy slot, is seen to absorb these events which we didn't
want to miss. So we don't link to dummy, but instead leave it linked
to NULL set, allow an error condition and detect the channel that
missed it.

Consider the case where we have a scatter-list like:
SG1->SG2->SG3->SG4->SG5->SG6->Null

For ex, for a MAX_NR_SG of 2, earlier we were splitting this as:
SG1->SG2->Null
SG3->SG4->Null
SG5->SG6->Null

Now we split it as
SG1->SG2->Null
SG3->SG4->Null
SG5->SG6->Dummy

This approach results in lesser unwanted interrupts that occur
for the last list split. The Dummy slot has the property of not
raising an error condition if events are missed unlike the Null
slot. We are OK with this as we're done with processing the
whole list once we reach Dummy.

Signed-off-by: Joel Fernandes <joelf@ti.com>
[modifed duplicate s-o-b & patch title]
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2013-09-04 18:38:46 +05:30
..
accessibility printk: move braille console support into separate braille.[ch] files 2013-07-31 14:41:03 -07:00
acpi ACPI / battery: Fix parsing _BIX return value 2013-07-30 14:00:42 +02:00
amba
ata ahci_imx: depend on CONFIG_MFD_SYSCON 2013-07-26 08:57:56 -04:00
atm
auxdisplay
base Driver core patches for 3.11-rc2 2013-07-18 12:48:40 -07:00
bcma
block Merge branch 'for-3.11/drivers' of git://git.kernel.dk/linux-block 2013-07-22 19:02:52 -07:00
bluetooth Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth 2013-07-31 15:11:50 -04:00
bus
cdrom
char parisc: agp/parisc-agp: allow binding of user memory to the AGP GART 2013-07-31 23:42:00 +02:00
clk
clocksource clocksource+irqchip: delete __cpuinit usage from all related files 2013-07-14 19:36:57 -04:00
connector
cpufreq cpufreq: Fix cpufreq driver module refcount balance after suspend/resume 2013-07-30 00:32:00 +02:00
cpuidle Revert "cpuidle: Quickly notice prediction failure for repeat mode" 2013-07-29 13:32:29 +02:00
crypto Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2013-07-24 11:05:18 -07:00
dca
devfreq
dio
dma dma: edma: Leave linked to Null slot instead of DUMMY slot 2013-09-04 18:38:46 +05:30
edac EDAC: Fix lockdep splat 2013-07-23 16:01:28 -07:00
eisa
extcon
firewire firewire: fix libdc1394/FlyCap2 iso event regression 2013-07-27 20:24:36 +02:00
firmware dmi_scan: add comments on dmi_present() and the loop in dmi_scan_machine() 2013-07-31 14:41:02 -07:00
fmc
gpio gpio_msm: Fix build error due to missing err.h 2013-07-31 00:34:31 +02:00
gpu drm/radeon: fix 64 bit divide in SI spm code 2013-08-04 11:03:14 +10:00
hid Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid 2013-08-02 14:22:15 -07:00
hsi
hv Drivers: hv: balloon: Do not post pressure status if interrupted 2013-07-16 23:19:19 -07:00
hwmon hwmon: (max6697) fix MAX6581 ideality 2013-08-03 07:04:50 -07:00
hwspinlock
i2c Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2013-07-13 14:52:21 -07:00
ide Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/ide 2013-07-10 18:15:41 -07:00
idle
iio The first round of IIO fixes for the 3.11 cycle. 2013-07-16 22:41:38 -07:00
infiniband Merge branches 'cma', 'cxgb3', 'cxgb4', 'ipoib', 'misc', 'mlx4', 'mlx5', 'nes', 'ocrdma' and 'qib' into for-next 2013-07-31 14:24:06 -07:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2013-07-13 18:05:13 -07:00
iommu IOMMU Updates for Linux 3.11 2013-07-10 14:46:40 -07:00
ipack
irqchip clocksource+irqchip: delete __cpuinit usage from all related files 2013-07-14 19:36:57 -04:00
isdn
leds
lguest
macintosh powerpc/windfarm: Fix noisy slots-fan on Xserve (rm31) 2013-08-01 13:11:47 +10:00
mailbox
md 2 more bugfixes for md in 3.11 2013-07-26 11:20:10 -07:00
media [media] saa7134: Fix unlocked snd_pcm_stop() call 2013-07-15 21:25:14 +02:00
memory
memstick
message
mfd
misc Char/Misc patches for 3.11-rc3 2013-07-26 11:36:12 -07:00
mmc ARM: pxa: propagate errors from regulator_enable() to pxamci 2013-07-23 12:15:15 -07:00
mtd
net Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2013-08-03 15:00:23 -07:00
nfc
ntb
nubus
of of/irq: init struct resource to 0 in of_irq_to_resource() 2013-07-22 19:40:38 +01:00
oprofile drivers: delete __cpuinit usage from all remaining drivers files 2013-07-14 19:36:59 -04:00
parisc parisc: Fix interrupt routing for C8000 serial ports 2013-07-31 23:42:32 +02:00
parport
pci PCI updates for v3.11: 2013-08-02 13:12:52 -07:00
pcmcia
pinctrl pinctrl: fix a memleak when freeing maps 2013-07-25 17:18:36 +02:00
platform x86 platform drivers: fix gpio leak 2013-07-10 15:42:51 -04:00
pnp PNP / ACPI: avoid garbage in resource name 2013-07-18 01:38:59 +02:00
power
pps
ps3
ptp
pwm
rapidio rapidio: fix use after free in rio_unregister_scan() 2013-07-31 14:41:02 -07:00
regulator
remoteproc Trivial remoteproc fixes by Suman Anna, Wei Yongjun and Thomas Meyer. 2013-07-11 12:35:09 -07:00
reset
rpmsg
rtc drivers/rtc/rtc-twl.c: fix: rtcX/wakealarm attribute isn't created 2013-07-31 14:41:03 -07:00
s390 s390/zcrypt: Alias for new zcrypt device driver base module 2013-07-19 08:37:39 +02:00
sbus
scsi [SCSI] isci: fix breakage caused by >16byte CDB patch 2013-07-24 14:18:12 -07:00
sfi
sh
sn
spi Merge remote-tracking branch 'spi/fix/xilinx' into spi-linus 2013-07-15 11:46:16 +01:00
ssb Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2013-07-13 14:52:21 -07:00
staging MAINTAINERS: Update the list of maintainers for staging/comedi driver. 2013-07-24 09:51:18 -07:00
target Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending 2013-07-11 12:57:19 -07:00
tc
thermal Thermal: Fix lockup of cpu_down() 2013-07-22 09:34:46 +08:00
tty parisc: Fix interrupt routing for C8000 serial ports 2013-07-31 23:42:32 +02:00
uio
usb USB: serial: ftdi_sio: add more RT Systems ftdi devices 2013-07-29 13:38:38 -07:00
uwb
vfio vfio-pci: Avoid deadlock on remove 2013-07-24 16:36:41 -06:00
vhost vhost: more fixes for 3.11 2013-07-23 14:38:20 -07:00
video Small fbdev fixes 2013-07-31 17:54:24 -07:00
virt
virtio No real surprises. 2013-07-10 14:50:58 -07:00
vlynq
vme
w1
watchdog Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2013-07-13 14:52:21 -07:00
xen Fixes: 2013-07-31 11:37:43 -07:00
zorro
Kconfig
Makefile