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linux/drivers/net/ethernet
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Jacob Keller b6138ed604 ixgbe: Fix PHC loophole allowing misconfiguration of increment register 
This patch fixes a potential hole when configuring the cycle counter used to
generate the nanosecond time clock. This clock is based off of the SYSTIME
registers along with the TIMINCA registers. The TIMINCA register determines
the increment to be added to the SYSTIME registers every DMA clock tick. This
register needs to be reconfigured whenever the link-speed changes. However,
the value calculated stays the same when link is down and when link is up.
Misconfiguration can occur if the link status changes due to a reset, which
causes the TIMINCA register to be reset. This reset puts the device in an
unstable state where the SYSTIME registers stop incrementing and the PTP
protocol does not function.

The solution is to double check the TIMINCA value and always reset the value
if the register is zero. This prevents a misconfiguration bug that halts the
PHC.

Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Acked-by: Don Skidmore <donald.c.skidmore@intel.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-06-17 16:15:06 -07:00
..
3com Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2012-05-22 19:22:50 -07:00
8390 drivers/net: delete all code/drivers depending on CONFIG_MCA 2012-05-17 16:37:41 -04:00
adaptec starfire: remove deprecated options. 2012-04-07 11:45:26 +02:00
adi bfin: Fix build failure due to get_ts_info() changes. 2012-04-06 00:17:50 -04:00
aeroflex
alteon Remove all #inclusions of asm/system.h 2012-03-28 18:30:03 +01:00
amd Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k 2012-05-21 12:43:54 -07:00
apple
atheros atl1c: remove PHY polling from atl1c_change_mtu 2012-04-30 21:44:16 -04:00
broadcom bnx2x: fix link for BCM57711 with 84823 phy 2012-06-16 23:38:36 -07:00
brocade Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2012-05-22 19:22:50 -07:00
cadence net/at91_ether: use gpio_to_irq for phy IRQ line 2012-04-28 21:48:39 -04:00
calxeda
chelsio cxgb4: DB Drop Recovery for RDMA and LLD queues 2012-05-18 13:22:28 -07:00
cirrus cirrus: cs89x0: Remove function prototypes and reorder declarations 2012-05-18 23:48:07 -04:00
cisco drivers/net: Convert compare_ether_addr to ether_addr_equal 2012-05-10 23:33:01 -04:00
davicom dm9000: some coldfire boards need this 2012-05-14 18:40:16 -04:00
dec drivers/net: Convert compare_ether_addr to ether_addr_equal 2012-05-10 23:33:01 -04:00
dlink Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2012-05-07 23:35:40 -04:00
emulex be2net: fix a race in be_xmit() 2012-06-08 14:44:19 -07:00
faraday
freescale fec_mpc52xx: fix timestamp filtering 2012-06-02 17:09:08 -04:00
fujitsu drivers/net: delete all code/drivers depending on CONFIG_MCA 2012-05-17 16:37:41 -04:00
hp
i825xx drivers/net: delete all code/drivers depending on CONFIG_MCA 2012-05-17 16:37:41 -04:00
ibm ehea: fix losing of NEQ events when one event occurred early 2012-05-10 22:45:54 -04:00
icplus
intel ixgbe: Fix PHC loophole allowing misconfiguration of increment register 2012-06-17 16:15:06 -07:00
marvell sky2: fix checksum bit management on some chips 2012-06-07 13:06:42 -07:00
mellanox InfiniBand/RDMA fixes for 3.5-rc2, all in hardware drivers: 2012-06-06 10:45:21 -07:00
micrel Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2012-05-16 22:17:37 -04:00
microchip
myricom myri10ge: stop using net_device.{base_addr, irq}. 2012-04-07 11:58:09 +02:00
natsemi drivers/net: delete all code/drivers depending on CONFIG_MCA 2012-05-17 16:37:41 -04:00
neterion Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2012-04-10 14:30:45 -04:00
nuvoton
nvidia forcedeth: add transmit timestamping support 2012-04-30 21:33:27 -04:00
nxp lpc_eth: fix tx completion 2012-06-11 13:12:33 -07:00
octeon
oki-semi Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2012-05-16 22:17:37 -04:00
packetengines yellowfin: stop using net_device.{base_addr, irq}. 2012-04-07 11:45:26 +02:00
pasemi net/pasemi: fix compiler warning 2012-05-02 20:52:48 -04:00
qlogic qlcnic: off by one in qlcnic_init_pci_info() 2012-06-15 15:30:15 -07:00
racal
rdc r6040: Do a Proper deinit at errorpath and also when driver unloads (calling r6040_remove_one) 2012-05-29 22:31:08 -04:00
realtek r8169: avoid NAPI scheduling delay. 2012-06-10 20:21:07 -07:00
renesas net: sh_eth: fix the rxdesc pointer when rx descriptor empty happens 2012-05-29 17:30:08 -04:00
seeq Remove all #inclusions of asm/system.h 2012-03-28 18:30:03 +01:00
sfc Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2012-05-16 22:17:37 -04:00
sgi
silan sc92031: stop using net_device.{base_addr, irq} 2012-04-07 11:45:27 +02:00
sis sis900: stop using net_device.{base_addr, irq} and convert to __iomem. 2012-04-07 11:47:18 +02:00
smsc net/smsc911x: Repair broken failure paths 2012-05-30 17:52:16 -04:00
stmicro net: stmmac: Fix clock en-/disable calls 2012-06-11 16:48:15 -07:00
sun Revert "niu: Add support for byte queue limits." 2012-06-08 00:28:16 -07:00
tehuti Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2012-05-22 19:22:50 -07:00
ti arm-soc: cleanups, part 2 2012-05-26 12:31:49 -07:00
tile tilegx network driver: initial support 2012-06-11 17:01:26 -07:00
toshiba drivers/net: Convert compare_ether_addr to ether_addr_equal 2012-05-10 23:33:01 -04:00
tundra Remove all #inclusions of asm/system.h 2012-03-28 18:30:03 +01:00
via Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2012-04-10 14:30:45 -04:00
wiznet net: WIZnet drivers: fix possible NULL dereference 2012-04-13 13:34:12 -04:00
xilinx Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2012-04-15 13:19:04 -04:00
xircom Remove all #inclusions of asm/system.h 2012-03-28 18:30:03 +01:00
xscale net: remove ixp2000 ethernet driver 2012-04-04 18:09:37 -04:00
dnet.c dnet: Support the get_ts_info ethtool method. 2012-04-04 05:28:46 -04:00
dnet.h
ethoc.c
fealnx.c fealnx: Remove unused local label 'out' in netdev_open(). 2012-04-07 09:02:32 -04:00
jme.c
jme.h
Kconfig Ethernet driver for the WIZnet W5300 chip 2012-04-05 01:43:02 -04:00
korina.c Remove all #inclusions of asm/system.h 2012-03-28 18:30:03 +01:00
lantiq_etop.c
Makefile Ethernet driver for the WIZnet W5300 chip 2012-04-05 01:43:02 -04:00
mipsnet.c
netx-eth.c
s6gmac.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2012-05-22 19:22:50 -07:00