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6c33ae1ad5
linux/drivers/net/ethernet
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Jiafei Pan 6c33ae1ad5 dpaa2-eth: use napi_schedule to be compatible with PREEMPT_RT 
The driver calls napi_schedule_irqoff() from a context where, in RT,
hardirqs are not disabled, since the IRQ handler is force-threaded.

In the call path of this function, __raise_softirq_irqoff() is modifying
its per-CPU mask of pending softirqs that must be processed, using
or_softirq_pending(). The or_softirq_pending() function is not atomic,
but since interrupts are supposed to be disabled, nobody should be
preempting it, and the operation should be safe.

Nonetheless, when running with hardirqs on, as in the PREEMPT_RT case,
it isn't safe, and the pending softirqs mask can get corrupted,
resulting in softirqs being lost and never processed.

To have common code that works with PREEMPT_RT and with mainline Linux,
we can use plain napi_schedule() instead. The difference is that
napi_schedule() (via __napi_schedule) also calls local_irq_save, which
disables hardirqs if they aren't already. But, since they already are
disabled in non-RT, this means that in practice we don't see any
measurable difference in throughput or latency with this patch.

Signed-off-by: Jiafei Pan <Jiafei.Pan@nxp.com>
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2020-08-03 18:21:30 -07:00
..
3com typhoon: use generic power management 2020-07-01 12:58:33 -07:00
8390 ne2k-pci: Use netif_msg_init to initialize msg_enable bits 2020-07-17 19:04:06 -07:00
adaptec starfire: use generic power management 2020-07-01 12:58:33 -07:00
aeroflex Replace HTTP links with HTTPS ones: GRETH 10/100/1G Ethernet MAC device driver 2020-07-07 15:44:27 -07:00
agere net: ethernet: et131x: Remove redundant register read 2020-07-17 18:48:15 -07:00
alacritech treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
allwinner treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
alteon net: alteon: Avoid some useless memset 2020-07-17 12:57:59 -07:00
altera treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
amazon net: ena: support new LLQ acceleration mode 2020-07-21 15:59:04 -07:00
amd xgbe: convert to new udp_tunnel_nic infra 2020-07-14 17:04:27 -07:00
apm
apple treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
aquantia net: ethernet: aquantia: Fix wrong return value 2020-08-03 15:57:02 -07:00
arc net: arc_emac: fix arc_emac_tx()'s return type 2020-06-28 20:52:53 -07:00
atheros net: ag71xx: add missed clk_disable_unprepare in error path of probe 2020-07-20 18:37:38 -07:00
aurora net: nb8800: fix nb8800_xmit()'s return type 2020-06-28 20:52:53 -07:00
broadcom bnxt_en: Remove superfluous memset() 2020-07-30 17:41:05 -07:00
brocade bna: bfi.h: Avoid the use of one-element array 2020-07-22 18:12:11 -07:00
cadence Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-07-25 17:49:04 -07:00
calxeda
cavium liquidio: Fix wrong return value in cn23xx_get_pf_num() 2020-08-03 15:57:31 -07:00
chelsio cxgb4: add TC-MATCHALL IPv6 support 2020-08-03 18:17:08 -07:00
cirrus docs: networking: reorganize driver documentation again 2020-06-26 16:08:44 -07:00
cisco enic: convert to new udp_tunnel_nic infra 2020-07-14 17:04:27 -07:00
cortina Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-08-02 01:02:12 -07:00
davicom treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
dec docs: networking: reorganize driver documentation again 2020-06-26 16:08:44 -07:00
dlink net: sundance: Replace HTTP links with HTTPS ones 2020-07-15 17:41:34 -07:00
emulex be2net: convert to new udp_tunnel_nic infra 2020-07-14 17:04:27 -07:00
ezchip treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
faraday treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
freescale dpaa2-eth: use napi_schedule to be compatible with PREEMPT_RT 2020-08-03 18:21:30 -07:00
fujitsu treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
google
hisilicon Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-08-02 01:02:12 -07:00
huawei hinic: add log in exception handling processes 2020-07-28 17:22:03 -07:00
i825xx treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
ibm ibmvnic: Fix IRQ mapping disposal in error path 2020-07-29 15:35:55 -07:00
intel Merge branch '100GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/jkirsher/next-queue 2020-08-03 15:43:59 -07:00
marvell net: mvpp2: fix memory leak in mvpp2_rx 2020-08-03 15:14:46 -07:00
mediatek Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-08-02 01:02:12 -07:00
mellanox mlxsw: spectrum_qdisc: Offload action trap for qevents 2020-08-03 18:06:46 -07:00
micrel ksz884x: switch from 'pci_' to 'dma_' API 2020-07-14 15:10:29 -07:00
microchip lan743x: remove redundant initialization of variable current_head_index 2020-07-22 17:55:35 -07:00
moxa treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
mscc Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-08-02 01:02:12 -07:00
myricom ethernet: myri10ge: use generic power management 2020-07-20 18:01:07 -07:00
natsemi natsemi: use generic power management 2020-07-01 12:58:33 -07:00
neterion Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-07-25 17:49:04 -07:00
netronome nfp: convert to new udp_tunnel_nic infra 2020-07-14 17:04:27 -07:00
ni net: nixge: fix potential memory leak in nixge_probe() 2020-07-30 16:55:39 -07:00
nvidia treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
nxp
oki-semi net: pch_gbe: fix pch_gbe_xmit_frame()'s return type 2020-06-28 20:52:53 -07:00
packetengines net: packetengines: switch from 'pci_' to 'dma_' API 2020-07-20 17:48:23 -07:00
pasemi treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
pensando ionic: separate interrupt for Tx and Rx 2020-08-03 15:32:02 -07:00
qlogic net: qed: use eth_zero_addr() to clear mac address 2020-08-03 15:38:31 -07:00
qualcomm net: rmnet: do not allow to add multiple bridge interfaces 2020-07-04 18:04:55 -07:00
rdc r6040: switch from 'pci_' to 'dma_' API 2020-07-20 17:49:50 -07:00
realtek r8169: allow to enable ASPM on RTL8125A 2020-07-21 16:12:19 -07:00
renesas net: ethernet: ravb: exit if re-initialization fails in tx timeout 2020-07-21 15:34:07 -07:00
rocker rocker: fix incorrect error handling in dma_rings_init 2020-06-15 13:37:36 -07:00
samsung treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
seeq treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
sfc sfc_ef100: remove duplicated include from ef100_netdev.c 2020-07-30 16:53:07 -07:00
sgi net: sgi: ioc3-eth: Fix the size used in some 'dma_free_coherent()' calls 2020-08-03 16:00:26 -07:00
silan sc92031: use generic power management 2020-07-30 17:43:01 -07:00
sis sis900: use generic power management 2020-07-30 17:43:01 -07:00
smsc Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2020-07-25 17:49:04 -07:00
socionext net: ethernet: ave: Fix error returns in ave_init 2020-07-21 18:31:46 -07:00
stmicro net: stmmac: fix failed to suspend if phy based WOL is enabled 2020-08-03 17:59:39 -07:00
sun net: sungem: switch from 'pci_' to 'dma_' API 2020-07-17 12:56:40 -07:00
synopsys net: dwc-xlgmac: fix xlgmac_xmit()'s return type 2020-06-28 20:52:53 -07:00
tehuti treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
ti tlan: use generic power management 2020-07-30 17:43:02 -07:00
toshiba net: spider_net: Remove a useless memset 2020-08-03 16:01:11 -07:00
tundra treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
via treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
wiznet treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
xilinx net: ll_temac: Use devm_platform_ioremap_resource_byname() 2020-07-30 17:44:28 -07:00
xircom xirc2ps_cs: remove dev null check from do_reset(). 2020-06-23 20:18:16 -07:00
xscale treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
dnet.c
dnet.h
ec_bhf.c
ethoc.c
fealnx.c net/fealnx: switch from 'pci_' to 'dma_' API 2020-07-20 18:32:49 -07:00
jme.c net: jme: Replace HTTP links with HTTPS ones 2020-07-13 17:45:04 -07:00
jme.h net: jme: Replace HTTP links with HTTPS ones 2020-07-13 17:45:04 -07:00
Kconfig treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
korina.c mm: reorder includes after introduction of linux/pgtable.h 2020-06-09 09:39:13 -07:00
lantiq_etop.c
lantiq_xrx200.c
Makefile