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8028ccda39
linux_dsm_epyc7002/drivers/net/ethernet
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Petr Machata 8028ccda39 mlxsw: spectrum_ptp: Keep unmatched entries in a linked list 
To identify timestamps for matching with their packets, Spectrum-1 uses a
five-tuple of (port, direction, domain number, message type, sequence ID).
If there are several clients from the same domain behind a single port
sending Delay_Req's, the only thing differentiating these packets, as far
as Spectrum-1 is concerned, is the sequence ID. Should sequence IDs between
individual clients be similar, conflicts may arise. That is not a problem
to hardware, which will simply deliver timestamps on a first comes, first
served basis.

However the driver uses a simple hash table to store the unmatched pieces.
When a new conflicting piece arrives, it pushes out the previously stored
one, which if it is a packet, is delivered without timestamp. Later on as
the corresponding timestamps arrive, the first one is mismatched to the
second packet, and the second one is never matched and eventually is GCd.

To correct this issue, instead of using a simple rhashtable, use rhltable
to keep the unmatched entries.

Previously, a found unmatched entry would always be removed from the hash
table. That is not the case anymore--an incompatible entry is left in the
hash table. Therefore removal from the hash table cannot be used to confirm
the validity of the looked-up pointer, instead the lookup would simply need
to be redone. Therefore move it inside the critical section. This
simplifies a lot of the code.

Fixes: 8748642751 ("mlxsw: spectrum: PTP: Support SIOCGHWTSTAMP, SIOCSHWTSTAMP ioctls")
Reported-by: Alex Veber <alexve@mellanox.com>
Signed-off-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-08-11 21:35:39 -07:00
..
3com
8390 net: 8390: Fix manufacturer name in Kconfig help text 2019-08-01 13:45:48 -04:00
adaptec
aeroflex treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
agere net: ethernet: et131x: Use GFP_KERNEL instead of GFP_ATOMIC when allocating tx_ring->tcb_ring 2019-07-31 08:33:30 -07:00
alacritech treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 235 2019-06-19 17:09:07 +02:00
allwinner net: ethernet: sun4i-emac: Support phy-handle property for finding PHYs 2019-08-06 11:29:16 -07:00
alteon treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
altera treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 201 2019-05-30 11:29:52 -07:00
amazon Revert "net: ena: ethtool: add extra properties retrieval via get_priv_flags" 2019-06-26 09:07:39 -07:00
amd net: amd: Spelling s/case/cause/ 2019-08-01 13:45:48 -04:00
apm
apple net: apple: Fix manufacturer name in Kconfig help text 2019-08-01 13:45:48 -04:00
aquantia Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2019-06-27 21:06:39 -07:00
arc treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
atheros net: ag71xx: Use GFP_KERNEL instead of GFP_ATOMIC in 'ag71xx_rings_init()' 2019-07-31 08:38:36 -07:00
aurora treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157 2019-05-30 11:26:37 -07:00
broadcom net: broadcom: Fix manufacturer name in Kconfig help text 2019-08-01 13:45:49 -04:00
brocade treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 292 2019-06-05 17:36:38 +02:00
cadence Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2019-07-08 19:48:57 -07:00
calxeda net/ethernet: using dev_get_drvdata directly 2019-07-05 15:25:04 -07:00
cavium net: thunderx: Use fwnode_get_mac_address() 2019-07-23 14:09:21 -07:00
chelsio net: cxgb3_main: Fix a resource leak in a error path in 'init_one()' 2019-08-06 11:34:23 -07:00
cirrus treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
cisco
cortina
davicom treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157 2019-05-30 11:26:37 -07:00
dec SPDX update for 5.2-rc3, round 1 2019-05-31 08:34:32 -07:00
dlink treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
emulex be2net: disable bh with spin_lock in be_process_mcc 2019-08-06 11:47:19 -07:00
ezchip net: nps_enet: Fix function names in doc comments 2019-08-11 21:32:33 -07:00
faraday Linux 5.2-rc4 2019-06-14 14:18:53 -06:00
freescale enetc: Select PHYLIB while CONFIG_FSL_ENETC_VF is set 2019-08-02 18:15:02 -07:00
fujitsu
google gve: Fix case where desc_cnt and data_cnt can get out of sync 2019-08-05 13:18:53 -07:00
hisilicon net: hisilicon: Fix dma_map_single failed on arm64 2019-08-06 14:14:01 -07:00
hp
huawei hinic: add fw version query 2019-07-07 22:15:12 -07:00
i825xx treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
ibm net: ehea: Mark expected switch fall-through 2019-07-29 11:11:51 -07:00
intel ixgbe: fix possible deadlock in ixgbe_service_task() 2019-08-09 13:17:00 -07:00
marvell drivers/net/ethernet/marvell/mvmdio.c: Fix non OF case 2019-08-05 13:30:48 -07:00
mediatek net: mediatek: Drop unneeded dependency on NET_VENDOR_MEDIATEK 2019-07-31 08:53:26 -07:00
mellanox mlxsw: spectrum_ptp: Keep unmatched entries in a linked list 2019-08-11 21:35:39 -07:00
micrel treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
microchip treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
moxa
mscc ocelot: Cancel delayed work before wq destruction 2019-07-26 14:11:30 -07:00
myricom
natsemi
neterion ethernet: remove redundant memset 2019-07-15 11:06:27 -07:00
netronome mlx5-fixes-2019-07-25 2019-07-26 14:26:41 -07:00
ni net: nixge: Spelling s/Instrument/Instruments/ 2019-08-01 13:45:49 -04:00
nuvoton treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 441 2019-06-05 17:37:17 +02:00
nvidia
nxp treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157 2019-05-30 11:26:37 -07:00
oki-semi treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 340 2019-06-05 17:37:07 +02:00
packetengines net: packetengines: Fix manufacturer spelling and capitalization 2019-08-01 13:45:49 -04:00
pasemi net: pasemi: fix an use-after-free in pasemi_mac_phy_init() 2019-07-08 16:33:02 -07:00
qlogic net/ethernet/qlogic/qed: force the string buffer NULL-terminated 2019-08-02 17:57:18 -07:00
qualcomm net: qualcomm: rmnet: Fix incorrect UL checksum offload logic 2019-07-26 14:20:06 -07:00
rdc
realtek r8169: don't use MSI before RTL8168d 2019-07-27 14:30:13 -07:00
renesas net: sh_eth: fix mdio access in sh_eth_close() for R-Car Gen2 and RZ/A1 SoCs 2019-05-29 13:24:54 -07:00
rocker rocker: fix memory leaks of fib_work on two error return paths 2019-07-29 10:58:06 -07:00
samsung net: samsung: Spelling s/case/cause/ 2019-08-01 13:45:49 -04:00
seeq treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
sfc sfc: Remove 'PCIE error reporting unavailable' 2019-07-08 12:16:48 -07:00
sgi treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
silan
sis sis900: correct a few typos 2019-07-14 12:22:11 -07:00
smsc net: smc911x: Mark expected switch fall-through 2019-07-29 15:13:10 -07:00
socionext net: netsec: remove static declaration for netsec_set_tx_de() 2019-07-09 14:46:40 -07:00
stmicro net: stmmac: tc: Do not return a fragment entry 2019-08-06 12:26:11 -07:00
sun net: ethernet: sun: remove redundant assignment to variable err 2019-07-04 12:12:13 -07:00
synopsys
tehuti treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
ti net: ethernet: ti: cpsw: Add of_node_put() before return and break 2019-07-16 12:37:30 -07:00
toshiba net: spider_net: Mark expected switch fall-through 2019-07-29 11:12:21 -07:00
tundra net: tundra: tsi108: use spin_lock_irqsave instead of spin_lock_irq in IRQ context 2019-08-08 22:43:34 -07:00
via net: ipv4: provide __rcu annotation for ifa_list 2019-06-02 18:08:36 -07:00
wiznet net: ethernet: wiznet: w5X00 add device tree support 2019-06-12 09:52:04 -07:00
xilinx net: axienet: fix a potential double free in axienet_probe() 2019-07-08 16:28:32 -07:00
xircom
xscale net: ixp4xx: Spelling s/XSacle/XScale/ 2019-08-01 13:45:49 -04:00
dnet.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
dnet.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
ec_bhf.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 282 2019-06-05 17:36:37 +02:00
ethoc.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
fealnx.c
jme.c ethernet: remove redundant memset 2019-07-15 11:06:27 -07:00
jme.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 195 2019-05-30 11:29:22 -07:00
Kconfig gve: Add basic driver framework for Compute Engine Virtual NIC 2019-07-01 19:36:35 -07:00
korina.c
lantiq_etop.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234 2019-06-19 17:09:07 +02:00
lantiq_xrx200.c
Makefile gve: Add basic driver framework for Compute Engine Virtual NIC 2019-07-01 19:36:35 -07:00
netx-eth.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234 2019-06-19 17:09:07 +02:00