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linux/drivers/net
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Florian Faber 67e3a9f31a can: mscan: mscan_rx_poll(): fix rx path lockup when returning from polling to irq mode 
commit 2d77bd61a2 upstream.

Under load, the RX side of the mscan driver can get stuck while TX still
works. Restarting the interface locks up the system. This behaviour
could be reproduced reliably on a MPC5121e based system.

The patch fixes the return value of the NAPI polling function (should be
the number of processed packets, not constant 1) and the condition under
which IRQs are enabled again after polling is finished.

With this patch, no more lockups were observed over a test period of ten
days.

Fixes: afa17a500a ("net/can: add driver for mscan family & mpc52xx_mscan")
Signed-off-by: Florian Faber <faber@faberman.de>
Cc: linux-stable <stable@vger.kernel.org>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-01-14 20:07:02 +01:00
..
appletalk net/appletalk: fix minor pointer leak to userspace in SIOCFINDIPDDPRT 2018-09-13 10:35:57 -07:00
arcnet arcnet: provide a buffer big enough to actually receive packets 2019-10-05 13:09:26 +02:00
bonding bonding: fix active-backup transition after link failure 2020-01-04 19:13:23 +01:00
caif caif-hsi: fix possible deadlock in cfhsi_exit_module() 2019-07-28 08:29:23 +02:00
can can: mscan: mscan_rx_poll(): fix rx path lockup when returning from polling to irq mode 2020-01-14 20:07:02 +01:00
dsa net: dsa: mv88e6xxx: Preserve priority when setting CPU port. 2020-01-12 12:17:25 +01:00
ethernet mlxsw: spectrum_qdisc: Ignore grafting of invisible FIFO 2020-01-12 12:17:28 +01:00
fddi
fjes fjes: fix missed check in fjes_acpi_add 2019-12-31 16:34:36 +01:00
hamradio 6pack,mkiss: fix possible deadlock 2020-01-04 19:13:27 +01:00
hippi
hyperv hv_netvsc: Fix unwanted rx_table reset 2020-01-12 12:17:23 +01:00
ieee802154 ieee802154: ca8210: prevent memory leak 2019-10-29 09:19:31 +01:00
ipvlan net: ipvlan: Fix ipvlan device tso disabled while NETIF_F_IP_CSUM is set 2019-06-25 11:35:58 +08:00
netdevsim
phy net: phy: initialise phydev speed and duplex sanely 2019-12-31 16:36:15 +01:00
plip
ppp ppp: Fix memory leak in ppp_write 2019-10-05 13:09:29 +02:00
slip slip: Fix use-after-free Read in slip_open 2019-12-05 09:21:30 +01:00
team team: Add vlan tx offload to hw_enc_features 2019-08-25 10:48:04 +02:00
usb net: usb: lan78xx: fix possible skb leak 2020-01-12 12:17:26 +01:00
vmxnet3
wan net/wan/fsl_ucc_hdlc: Avoid double free in ucc_hdlc_probe() 2019-12-05 09:20:56 +01:00
wimax wimax/i2400m: fix a memory leak bug 2019-09-10 10:33:48 +01:00
wireless mwifiex: Fix heap overflow in mmwifiex_process_tdls_action_frame() 2020-01-12 12:17:06 +01:00
xen-netback net: xen-netback: fix return type of ndo_start_xmit function 2019-11-24 08:19:18 +01:00
dummy.c
eql.c
geneve.c geneve: correctly handle ipv6.disable module parameter 2019-03-10 07:17:17 +01:00
gtp.c gtp: fix bad unlock balance in gtp_encap_enable_socket 2020-01-12 12:17:24 +01:00
ifb.c
Kconfig geneve: change NET_UDP_TUNNEL dependency to select 2019-12-05 09:21:10 +01:00
LICENSE.SRC
loopback.c net: loopback: clear skb->tstamp before netif_rx() 2018-11-13 11:08:20 -08:00
macsec.c macsec: let the administrator set UP state even if lowerdev is down 2019-12-01 09:17:03 +01:00
macvlan.c macvlan: do not assume mac_header is set in macvlan_broadcast() 2020-01-12 12:17:25 +01:00
macvtap.c
Makefile net: Always descend into dsa/ 2019-05-25 18:23:19 +02:00
mdio.c
mii.c
net_failover.c failover: Fix error return code in net_failover_create 2019-11-20 18:46:12 +01:00
netconsole.c
nlmon.c
ntb_netdev.c ntb_netdev: fix sleep time mismatch 2019-12-01 09:17:13 +01:00
rionet.c rapidio/rionet: do not free skb before reading its length 2018-12-05 19:31:59 +01:00
sb1000.c
Space.c
sungem_phy.c
tap.c
thunderbolt.c net: thunderbolt: Unregister ThunderboltIP protocol handler when suspending 2019-06-15 11:54:07 +02:00
tun.c tun: fix data-race in gro_normal_list() 2019-12-31 16:36:03 +01:00
veth.c veth: Orphan skb before GRO 2018-09-16 15:33:50 -07:00
virtio_net.c virtio_net: Account for tx bytes and packets on sending xdp_frames 2019-02-12 19:47:23 +01:00
vrf.c vrf: mark skb for multicast or link-local as enslaved to VRF 2019-12-01 09:17:28 +01:00
vsockmon.c
vxlan.c vxlan: fix tos value before xmit 2020-01-12 12:17:27 +01:00
xen-netfront.c xen-netfront: do not use ~0U as error return value for xennet_fill_frags() 2019-10-07 18:57:25 +02:00