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Alexander Duyck 8f4a0a3d9f ixgbe: Fix issues with SR-IOV loopback when flow control is disabled 
This patch allows us to avoid a Tx hang when SR-IOV is enabled.  This hang
can be triggered by sending small packets at a rate that was triggering Rx
missed errors from the adapter while the internal Tx switch and at least
one VF are enabled.

This was all due to the fact that under heavy stress the Rx FIFO never
drained below the flow control high water mark.  This resulted in the Tx
FIFO being head of line blocked due to the fact that it relies on the flow
control high water mark to determine when it is acceptable for the Tx to
place a packet in the Rx FIFO.

The resolution for this is to set the FCRTH value to the RXPBSIZE - 32 so
that even if the ring is almost completely full we can still place Tx
packets on the Rx ring and drop incoming Rx traffic if we do not have
sufficient space available in the Rx FIFO.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Tested-by: Sibai Li <sibai.li@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-03-19 17:37:21 -04:00
..
accessibility
acpi ACPI: remove duplicated lines of merging problems with acpi_processor_add 2012-02-08 15:07:03 -08:00
amba
ata pata/at91: use newly introduced SMC accessors 2012-02-13 18:31:37 +01:00
atm eni: fix driver remove function and driver probe error path. 2012-03-16 23:13:20 -07:00
auxdisplay
base Fixes a bootstrapping issue for some registers when a less commonly used 2012-02-18 15:37:25 -08:00
bcma bcma: silence PMU warning for BCM4331 2012-03-07 13:56:37 -05:00
block Merge branch 'for-linus' of git://git.kernel.dk/linux-block 2012-03-14 17:16:45 -07:00
bluetooth Bluetooth: Adding USB device 13d3:3375 as an Atheros AR3012. 2012-03-08 02:16:24 -03:00
cdrom cdrom: move shared static to cdrom_device_info 2012-02-08 20:03:14 +01:00
char agp: fix scratch page cleanup 2012-01-26 18:36:48 +00:00
clk
clocksource
connector
cpufreq
cpuidle cpuidle: Default y on powerpc pSeries 2012-02-22 16:48:51 +11:00
crypto Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2012-03-03 09:31:49 -08:00
dca
devfreq
dio
dma i.MX SDMA: Fix burstsize settings 2012-02-02 14:00:43 +05:30
edac asm-generic: architecture independent readq/writeq for 32bit environment 2012-02-21 16:47:28 -08:00
eisa
firewire firewire: ohci: disable MSI on Ricoh controllers 2012-01-30 21:33:34 +01:00
firmware
gpio gpio: Add missing spin_lock_init in gpio-ml-ioh driver 2012-02-01 21:59:37 -07:00
gpu Merge branch 'exynos-drm-fixes' of git://git.infradead.org/users/kmpark/linux-samsung into drm-fixes 2012-03-15 09:41:26 +00:00
hid HID: hid-input: allow array fields out of range 2012-03-05 10:28:58 +01:00
hv
hwmon hwmon: (zl6100) Enable interval between chip accesses for all chips 2012-03-14 09:17:03 -07:00
hwspinlock
i2c i2c-algo-bit: Fix spurious SCL timeouts under heavy load 2012-03-15 18:11:05 +01:00
ide ARM: at91: drop ide driver in favor of the pata one 2012-02-13 18:31:37 +01:00
idle ACPI processor hotplug: Delay acpi_processor_start() call for hotplugged cores 2012-01-19 21:26:32 -05:00
ieee802154
infiniband netlink: add netlink_dump_control structure for netlink_dump_start() 2012-02-26 14:10:06 -05:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2012-03-07 08:31:31 -08:00
iommu x86/amd: iommu_set_device_table() must not be __init 2012-03-08 11:36:06 +01:00
isdn ppp: Replace uses of <linux/if_ppp.h> with <linux/ppp-ioctl.h> 2012-03-04 20:41:38 -05:00
leds drivers/leds/leds-lm3530.c: fix setting pltfm->als_vmax 2012-02-08 19:03:51 -08:00
lguest
macintosh powerpc/adb: Use set_current_state() 2012-02-16 16:15:12 +11:00
mca
md Device-mapper fixes for 3.3. 2012-03-08 17:21:51 -08:00
media Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media 2012-03-15 17:06:05 -07:00
memstick
message
mfd mfd: Correct readability of WM8994 DC servo 4E register 2012-03-01 01:42:52 +01:00
misc c2port: class_create() returns an ERR_PTR 2012-03-05 15:49:43 -08:00
mmc mmc: core: Fixup suspend/resume issues for UHS-I cards 2012-03-04 12:25:15 -05:00
mtd - Fix a regression in 16-bit Atmel NAND flash which was introduced in 3.1 2012-02-04 07:17:47 -08:00
net ixgbe: Fix issues with SR-IOV loopback when flow control is disabled 2012-03-19 17:37:21 -04:00
nfc NFC: Remove the rf mode parameter from the DEP link up routine 2012-03-06 15:16:23 -05:00
nubus
of of/mdio: fix fixed link bus name 2012-02-27 10:09:52 -06:00
oprofile
parisc [PARISC] include <linux/prefetch.h> in drivers/parisc/iommu-helpers.h 2012-02-27 09:44:15 -06:00
parport
pci Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2012-03-18 23:29:41 -04:00
pcmcia ARM: pxa: fix error handling in pxa2xx_drv_pcmcia_probe 2012-02-16 10:41:23 +08:00
pinctrl pinctrl: restore pin naming 2012-02-01 19:35:21 +01:00
platform panasonic-laptop: avoid overflow in acpi_pcc_hotkey_add() 2012-03-12 10:25:51 -04:00
pnp
power lp8727_charger: Add terminating entry for i2c_device_id table 2012-02-01 21:34:26 +04:00
pps pps: class_create() returns an ERR_PTR, not NULL 2012-03-05 15:49:43 -08:00
ps3
ptp phc: Update author's email address. 2012-03-17 01:41:43 -07:00
rapidio rapidio/tsi721: fix bug in register offset definitions 2012-03-15 17:03:03 -07:00
regulator regulator: da9052: Ensure the selected voltage falls within the specified range 2012-03-11 20:39:10 +00:00
rtc drivers/rtc/rtc-r9701.c: fix crash in r9701_remove() 2012-03-05 15:49:43 -08:00
s390 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2012-03-09 14:34:20 -08:00
sbus
scsi Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2012-03-05 21:16:26 -05:00
sfi
sh sh: clkfwk: bugfix: use clk_reparent() for div6 clocks 2012-01-24 10:44:49 +09:00
sn
spi Fix section mismatch in spi-pl022.c 2012-02-13 11:57:58 -07:00
ssb ssb: remove 5GHz antenna gain from sprom 2012-03-05 15:20:49 -05:00
staging Staging: wlags49_h2: print MAC via printk format specifier 2012-02-24 15:41:41 -05:00
target iscsi-target: Fix reservation conflict -EBUSY response handling bug 2012-03-13 21:43:58 -07:00
tc
telephony
thermal thermal: Rename generate_netlink_event 2012-01-23 03:15:25 -05:00
tty Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2012-03-18 23:29:41 -04:00
uio
usb Revert "powerpc/usb: fix issue of CPU halt when missing USB PHY clock" 2012-03-02 16:08:54 -08:00
uwb
vhost
video drivers/video/backlight/s6e63m0.c: fix corruption storing gamma mode 2012-03-15 17:03:04 -07:00
virt
virtio virtio: balloon: leak / fill balloon across S4 2012-03-01 09:28:41 +10:30
vlynq
w1
watchdog watchdog: fix GETTIMEOUT ioctl in booke_wdt 2012-02-29 09:46:13 +01:00
xen xenbus_dev: add missing error check to watch handling 2012-02-03 16:07:05 -05:00
zorro
Kconfig
Makefile