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37d6017b84
linux/drivers
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Fugang Duan 37d6017b84 net: fec: Workaround for imx6sx enet tx hang when enable three queues 
When enable three queues on imx6sx enet, and then do tx performance
test with iperf tool, after some time running, tx hang.

Found that:
	If uDMA is running, software set TDAR may cause tx hang.
	If uDMA is in idle, software set TDAR don't cause tx hang.

There is a TDAR race condition for mutliQ when the software sets TDAR
and the UDMA clears TDAR simultaneously or in a small window (2-4 cycles).
This will cause the udma_tx and udma_tx_arbiter state machines to hang.
The issue exist at i.MX6SX enet IP.

So, the Workaround is checking TDAR status four time, if TDAR cleared by
hardware and then write TDAR, otherwise don't set TDAR.

The patch is only one Workaround for the issue ERR007885.

Signed-off-by: Fugang Duan <B38611@freescale.com>
Signed-off-by: Frank Li <Frank.Li@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-19 15:36:50 -04:00
..
accessibility
acpi Merge branches 'acpi-video' and 'acpi-ec' 2014-09-05 15:29:12 +02:00
amba
ata ahci_xgene: Fix the link down in first attempt for the APM X-Gene SoC AHCI SATA host controller driver. 2014-09-06 11:27:15 +09:00
atm Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2014-08-13 18:27:40 -06:00
auxdisplay
base Merge remote-tracking branches 'regmap/fix/cache', 'regmap/fix/debugfs' and 'regmap/fix/volatile' into regmap-linus 2014-08-31 13:23:45 +01:00
bcma Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless 2014-09-08 11:14:56 -04:00
block Merge branch 'akpm' (fixes from Andrew Morton) 2014-08-29 16:28:29 -07:00
bluetooth Bluetooth: Remove typedef bt3c_info_t 2014-08-14 08:49:26 +02:00
bus bus: arm-ccn: Move event cleanup routine 2014-09-05 13:25:01 -07:00
cdrom
char virtio: rng: add derating factor for use by hwrng core 2014-08-15 10:26:01 +05:30
clk ARM: SoC platform changes for 3.17 2014-08-08 11:14:29 -07:00
clocksource ARM: SoC platform changes for 3.17 2014-08-08 11:14:29 -07:00
connector connector: Use ktime_get_ns() 2014-07-23 10:18:07 -07:00
cpufreq cpufreq: intel_pstate: Remove unneeded variable 2014-09-03 01:31:04 +02:00
cpuidle ARM: 8130/1: cpuidle/cpuidle-big_little: fix reading cpu id part number 2014-08-27 15:40:45 +01:00
crypto PCI changes for the v3.17 merge window (part 2): 2014-08-14 18:10:33 -06:00
dca
devfreq PM / OPP: Remove ARCH_HAS_OPP 2014-07-23 00:51:30 +02:00
dio
dma Merge branch 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma 2014-08-11 07:14:01 -07:00
dma-buf dma-buf/fence: Fix a kerneldoc warning 2014-08-28 11:59:09 +05:30
edac Merge branch 'linux_next' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-edac 2014-08-15 17:56:45 -06:00
eisa
extcon extcon: sm5502: Change internal hardware switch according to cable type 2014-07-23 10:22:35 +09:00
firewire Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2014-08-06 09:38:14 -07:00
firmware firmware: Do not use WARN_ON(!spin_is_locked()) 2014-08-22 08:45:40 +01:00
fmc
gpio gpio: bt8xx: fix release of managed resources 2014-08-29 14:31:43 +02:00
gpu Merge branch 'linux-3.17' of git://anongit.freedesktop.org/git/nouveau/linux-2.6 into drm-fixes 2014-09-05 09:27:33 +10:00
hid Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid 2014-08-27 09:38:06 -07:00
hsi HSI changes for the v3.17 series 2014-08-06 20:06:14 -07:00
hv Char / Misc driver patches for 3.17-rc1 2014-08-04 17:32:24 -07:00
hwmon hwmon: (ds1621) Update zbits after conversion rate change 2014-08-28 11:18:47 -07:00
hwspinlock hwspinlock: enable OMAP build for AM33xx, AM43xx & DRA7xx 2014-07-29 11:46:28 +03:00
i2c Revert "i2c: rcar: remove spinlock" 2014-09-04 19:59:42 +02:00
ide ide: use module_platform_driver() 2014-08-05 21:16:46 -07:00
idle intel_idle: Broadwell support 2014-08-15 17:06:40 -04:00
iio Staging driver patches for 3.17-rc1 2014-08-04 18:36:12 -07:00
infiniband mlx4: Set user-space raw Ethernet QPs to properly handle VXLAN traffic 2014-08-29 20:13:00 -07:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2014-09-03 17:26:12 -07:00
iommu iommu/core: Check for the right function pointer in iommu_map() 2014-08-19 00:19:26 +02:00
ipack
irqchip ARM: SoC platform changes for 3.17 2014-08-08 11:14:29 -07:00
isdn mISDN: remove DSP_NEVER_DEFINED and adjust code identation 2014-09-05 22:20:21 -07:00
leds Revert "leds: convert blink timer to workqueue" 2014-09-02 10:02:13 -07:00
lguest mm/vmalloc.c: clean up map_vm_area third argument 2014-08-06 18:01:19 -07:00
macintosh == Changes to existing drivers == 2014-08-07 17:23:16 -07:00
mailbox mailbox/omap: add a parent structure for every IP instance 2014-07-29 01:57:25 -07:00
mcb
md dm crypt: fix access beyond the end of allocated space 2014-08-28 14:24:09 -04:00
media media: use pci_zalloc_consistent 2014-08-08 15:57:28 -07:00
memory memory: Freescale CoreNet Coherency Fabric error reporting driver 2014-07-29 19:26:30 -05:00
memstick
message mptfusion: tweak null pointer checks 2014-07-25 17:16:58 -04:00
mfd mfd: twl4030-power: Fix PM idle pin configuration to not conflict with regulators 2014-08-28 15:57:55 +01:00
misc mei: nfc: fix memory leak in error path 2014-08-25 13:16:23 -07:00
mmc PCI changes for the v3.17 merge window (part 2): 2014-08-14 18:10:33 -06:00
mtd Two trivial MTD updates for 3.17-rc4: 2014-09-06 12:12:09 -07:00
net net: fec: Workaround for imx6sx enet tx hang when enable three queues 2014-09-19 15:36:50 -04:00
nfc NFC: st21nfca: Adding P2P support to st21nfca in Initiator & Target mode 2014-07-23 01:14:41 +02:00
ntb
nubus
of of/irq: Fix lookup to use 'interrupts-extended' property first 2014-08-16 09:03:58 +01:00
oprofile
parisc
parport drivers/parport/parport_ip32.c: use PTR_ERR_OR_ZERO 2014-08-08 15:57:25 -07:00
pci PCI update for v3.17: 2014-09-03 08:45:48 -07:00
pcmcia Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc 2014-08-07 08:50:34 -07:00
phy ARM: SoC driver changes for 3.17 2014-08-08 11:34:32 -07:00
pinctrl pinctrl: exynos: Lock GPIOs as interrupts when used as EINTs 2014-08-21 07:24:29 -05:00
platform toshiba_acpi: fix and cleanup toshiba_kbd_bl_mode_store() 2014-09-03 10:45:12 -07:00
pnp ACPI / PNP: Fix acpi_pnp_match() 2014-07-30 00:23:09 +02:00
power ARM: SoC platform changes for 3.17 2014-08-08 11:14:29 -07:00
powercap powercap / RAPL: change domain detection message 2014-09-03 01:29:00 +02:00
pps
ps3
ptp PCI: Remove DEFINE_PCI_DEVICE_TABLE macro use 2014-08-12 12:15:14 -06:00
pwm pwm: Fix period and polarity in pwm_get() for non-perfect matches 2014-08-18 10:58:43 +02:00
rapidio PCI: Remove DEFINE_PCI_DEVICE_TABLE macro use 2014-08-12 12:15:14 -06:00
ras
regulator == Changes to existing drivers == 2014-08-07 17:17:39 -07:00
remoteproc
reset
rpmsg
rtc drivers/rtc/rtc-s5m.c: re-add support for devices without irq specified 2014-08-29 16:28:16 -07:00
s390 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2014-09-07 19:56:38 -07:00
sbus Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc 2014-08-05 18:57:18 -07:00
scsi Merge branch 'for-linus' of git://git.kernel.dk/linux-block 2014-08-29 11:21:49 -07:00
sfi
sh sh: intc: Confine SH_INTC to platforms that need it 2014-08-22 12:28:16 +09:00
sn
soc
spi Merge remote-tracking branch 'spi/fix/sh-msiof' into spi-linus 2014-08-31 13:46:19 +01:00
spmi
ssb ssb: add PCI ID 0x4351 2014-08-25 15:39:22 -04:00
staging Merge tag 'master-2014-09-08' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next 2014-09-08 16:43:58 -07:00
target SCSI misc on 20140806 2014-08-06 20:10:32 -07:00
tc
thermal
thunderbolt thunderbolt: Clear hops before overwriting 2014-08-26 14:54:48 -07:00
tty The branch contains the following device tree changes the v3.17 merge 2014-08-14 09:53:39 -06:00
uio
usb Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2014-09-07 21:41:53 -07:00
uwb uwb/whci: use correct structure type name in sizeof 2014-08-01 15:48:08 -07:00
vfio drivers/vfio: Enable VFIO if EEH is not supported 2014-08-08 10:39:16 -06:00
vhost
video fbdev fixes for 3.17 2014-08-29 11:59:46 -07:00
virt
virtio virtio_ring: unify direct/indirect code paths. 2014-09-13 12:52:35 -04:00
vlynq
vme vme: bridges: use pci_zalloc_consistent 2014-08-08 15:57:30 -07:00
w1
watchdog Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2014-08-07 08:47:00 -07:00
xen PCI: Remove DEFINE_PCI_DEVICE_TABLE macro use 2014-08-12 12:15:14 -06:00
zorro
Kconfig Char / Misc driver patches for 3.17-rc1 2014-08-04 17:32:24 -07:00
Makefile Driver core patches for 3.17-rc1 2014-08-04 18:34:04 -07:00