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Heiner Kallweit 4d8f5df0cb net: dsa: mv88e6xxx: prevent interrupt storm caused by mv88e6390x_port_set_cmode 
[ Upstream commit ed8fe20205 ]

When debugging another issue I faced an interrupt storm in this
driver (88E6390, port 9 in SGMII mode), consisting of alternating
link-up / link-down interrupts. Analysis showed that the driver
wanted to set a cmode that was set already. But so far
mv88e6390x_port_set_cmode() doesn't check this and powers down
SERDES, what causes the link to break, and eventually results in
the described interrupt storm.

Fix this by checking whether the cmode actually changes. We want
that the very first call to mv88e6390x_port_set_cmode() always
configures the registers, therefore initialize port.cmode with
a value that is different from any supported cmode value.
We have to take care that we only init the ports cmode once
chip->info->num_ports is set.

v2:
- add small helper and init the number of actual ports only

Fixes: 364e9d7776 ("net: dsa: mv88e6xxx: Power on/off SERDES on cmode change")
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-03-10 07:17:20 +01:00
..
accessibility
acpi acpi/nfit: Fix race accessing memdev in nfit_get_smbios_id() 2019-02-27 10:08:54 +01:00
amba
android binder: fix race that allows malicious free of live buffer 2018-12-05 19:32:11 +01:00
ata libata: Add NOLPM quirk for SAMSUNG MZ7TE512HMHP-000L1 SSD 2019-02-15 08:10:10 +01:00
atm atm: he: fix sign-extension overflow on large shift 2019-02-27 10:08:57 +01:00
auxdisplay auxdisplay: charlcd: fix x/y command parsing 2019-01-13 09:51:03 +01:00
base cacheinfo: Keep the old value if of_property_read_u32 fails 2019-02-12 19:47:26 +01:00
bcma
block block/swim3: Fix -EBUSY error when re-opening device after unmount 2019-02-12 19:47:18 +01:00
bluetooth Bluetooth: hci_bcm: Handle deferred probing for the clock supply 2019-02-12 19:47:13 +01:00
bus
cdrom gdrom: fix a memory leak bug 2019-02-12 19:47:18 +01:00
char char/mwave: fix potential Spectre v1 vulnerability 2019-01-31 08:14:36 +01:00
clk clk: vc5: Abort clock configuration without upstream clock 2019-03-05 17:58:46 +01:00
clocksource clocksource/drivers/integrator-ap: Add missing of_node_put() 2019-01-26 09:32:42 +01:00
connector
cpufreq cpufreq: Use struct kobj_attribute instead of struct global_attr 2019-03-10 07:17:15 +01:00
cpuidle cpuidle: big.LITTLE: fix refcount leak 2019-02-12 19:47:08 +01:00
crypto crypto: ux500 - Use proper enum in hash_set_dma_transfer 2019-02-12 19:47:17 +01:00
dax mm, devm_memremap_pages: fix shutdown handling 2019-01-13 09:51:04 +01:00
dca
devfreq
dio
dma dmaengine: imx-dma: fix wrong callback invoke 2019-02-12 19:47:24 +01:00
dma-buf
edac EDAC, skx_edac: Fix logical channel intermediate decoding 2018-11-13 11:08:44 -08:00
eisa
extcon
firewire
firmware x86/platform/UV: Use efi_runtime_lock to serialise BIOS calls 2019-02-20 10:25:48 +01:00
fmc
fpga fpga: altera-cvp: fix 'bad IO access' on x86_64 2019-02-12 19:46:59 +01:00
fsi fsi: master-ast-cf: select GENERIC_ALLOCATOR 2018-12-17 09:24:35 +01:00
gnss gnss: sirf: fix activation retry handling 2018-12-13 09:16:22 +01:00
gpio gpio: pxa: avoid attempting to set pin direction via pinctrl on MMP2 2019-02-27 10:08:49 +01:00
gpu drm: Block fb changes for async plane updates 2019-03-05 17:58:53 +01:00
hid HID: debug: fix the ring buffer implementation 2019-02-12 19:47:24 +01:00
hsi
hv Drivers: hv: vmbus: Check for ring when getting debug info 2019-01-31 08:14:36 +01:00
hwmon hwmon: (tmp421) Correct the misspelling of the tmp442 compatible attribute in OF device ID table 2019-02-27 10:08:57 +01:00
hwspinlock
hwtracing intel_th: msu: Fix an off-by-one in attribute store 2019-01-13 09:51:10 +01:00
i2c i2c: sh_mobile: Add support for r8a774c0 (RZ/G2E) 2019-02-12 19:47:11 +01:00
ide ide: fix a typo in the settings proc file name 2019-01-31 08:14:42 +01:00
idle
iio iio: ti-ads8688: Update buffer allocation for timestamps 2019-02-15 08:10:10 +01:00
infiniband RDMA/srp: Rework SCSI device reset handling 2019-02-27 10:09:00 +01:00
input Input: elantech - enable 3rd button support on Fujitsu CELSIUS H780 2019-02-20 10:25:47 +01:00
iommu iommu/arm-smmu-v3: Use explicit mb() when moving cons pointer 2019-02-12 19:47:07 +01:00
ipack
irqchip irqchip/gic-v3-mbi: Fix uninitialized mbi_lock 2019-03-05 17:58:48 +01:00
isdn isdn: avm: Fix string plus integer warning from Clang 2019-02-27 10:08:58 +01:00
leds leds: lp5523: fix a missing check of return value of lp55xx_read 2019-02-27 10:08:57 +01:00
lightnvm lightnvm: pblk: add lock protection to list operations 2019-02-12 19:47:08 +01:00
macintosh
mailbox mailbox: PCC: handle parse error 2018-11-13 11:08:18 -08:00
mcb
md dm thin: fix bug where bio that overwrites thin block ignores FUA 2019-02-20 10:25:49 +01:00
media media: coda: fix H.264 deblocking filter controls 2019-02-12 19:47:07 +01:00
memory
memstick memstick: Prevent memstick host from getting runtime suspended during card detection 2019-02-12 19:47:10 +01:00
message
mfd mfd: mc13xxx: Fix a missing check of a register-read failure 2019-02-27 10:08:52 +01:00
misc eeprom: at24: add support for 24c2048 2019-02-20 10:25:35 +01:00
mmc mmc: sdhci-esdhc-imx: correct the fix of ERR004536 2019-03-05 17:58:53 +01:00
mtd mtd: rawnand: gpmi: fix MX28 bus master lockup problem 2019-02-15 08:10:10 +01:00
mux mux: adgs1408: use the correct MODULE_LICENSE 2018-10-12 17:36:39 +02:00
net net: dsa: mv88e6xxx: prevent interrupt storm caused by mv88e6390x_port_set_cmode 2019-03-10 07:17:20 +01:00
nfc NFC: nfcmrvl_uart: fix OF child-node lookup 2018-11-13 11:08:48 -08:00
ntb
nubus
nvdimm mm, devm_memremap_pages: fix shutdown handling 2019-01-13 09:51:04 +01:00
nvme nvme-multipath: drop optimization for static ANA group IDs 2019-03-05 17:58:51 +01:00
nvmem nvmem: check the return value of nvmem_add_cells() 2018-11-13 11:08:35 -08:00
of of: overlay: do not duplicate properties from overlay for new nodes 2019-02-06 17:30:16 +01:00
opp OPP: Use opp_table->regulators to verify no regulator case 2019-02-12 19:47:08 +01:00
oprofile
parisc
parport
pci PCI: Fix __initdata issue with "pci=disable_acs_redir" parameter 2019-02-23 09:07:26 +01:00
pcmcia pcmcia: Implement CLKRUN protocol disabling for Ricoh bridges 2018-11-13 11:08:17 -08:00
perf perf: arm_spe: handle devm_kasprintf() failure 2019-02-12 19:47:03 +01:00
phy phy: ath79-usb: Fix the main reset name to match the DT binding 2019-03-05 17:58:48 +01:00
pinctrl pinctrl: max77620: Use define directive for max77620_pinconf_param values 2019-02-27 10:09:03 +01:00
platform platform/x86: mlx-platform: Fix tachometer registers 2019-02-12 19:47:08 +01:00
pnp
power power: supply: olpc_battery: correct the temperature units 2019-01-13 09:51:10 +01:00
powercap
pps
ps3
ptp ptp: Fix pass zero to ERR_PTR() in ptp_clock_register 2019-02-12 19:47:01 +01:00
pwm
rapidio
ras
regulator regulator: fix crash caused by null driver data 2018-09-20 09:04:51 -07:00
remoteproc remoteproc: qcom: q6v5: Propagate EPROBE_DEFER 2018-11-13 11:08:52 -08:00
reset
rpmsg rpmsg: smd: fix memory leak on channel create 2018-11-13 11:08:55 -08:00
rtc rtc: m41t80: Correct alarm month range with RTC reads 2019-01-09 17:38:48 +01:00
s390 s390/zcrypt: fix specification exception on z196 during ap probe 2019-02-20 10:25:48 +01:00
sbus drivers/sbus/char: add of_node_put() 2018-12-21 14:15:17 +01:00
scsi scsi: csiostor: fix NULL pointer dereference in csio_vport_set_state() 2019-03-05 17:58:50 +01:00
sfi
sh
siox
slimbus slimbus: ngd: mark PM functions as __maybe_unused 2018-12-19 19:19:49 +01:00
sn
soc soc: bcm: brcmstb: Don't leak device tree node reference 2019-02-12 19:47:03 +01:00
soundwire
spi spi: bcm2835: Unbreak the build of esoteric configs 2019-01-09 17:38:49 +01:00
spmi
ssb
staging staging: android: ashmem: Avoid range_alloc() allocation with ashmem_mutex held. 2019-03-10 07:17:16 +01:00
target scsi: tcmu: avoid cmd/qfull timers updated whenever a new cmd comes 2019-02-27 10:08:55 +01:00
tc TC: Set DMA masks for devices 2018-11-13 11:08:51 -08:00
tee tee: optee: avoid possible double list_del() 2019-02-12 19:47:08 +01:00
thermal drivers: thermal: int340x_thermal: Fix sysfs race condition 2019-03-05 17:58:48 +01:00
thunderbolt thunderbolt: Prevent root port runtime suspend during NVM upgrade 2018-12-17 09:24:36 +01:00
tty serial: fsl_lpuart: fix maximum acceptable baud rate with over-sampling 2019-03-05 17:58:49 +01:00
uio uio: Fix an Oops on load 2018-11-27 16:13:09 +01:00
usb USB: serial: ftdi_sio: add ID for Hjelmslund Electronics USB485 2019-03-10 07:17:15 +01:00
uwb
vfio vfio/type1: Fix unmap overflow off-by-one 2019-01-16 22:04:34 +01:00
vhost vhost: return EINVAL if iovecs size does not match the message size 2019-02-27 10:08:56 +01:00
video udlfb: handle unplug properly 2019-02-27 10:09:03 +01:00
virt vbox: fix link error with 'gcc -Og' 2019-02-12 19:46:59 +01:00
virtio
visorbus
vlynq
vme
w1 w1: omap-hdq: fix missing bus unregister at removal 2018-11-13 11:08:48 -08:00
watchdog watchdog: mt7621_wdt/rt2880_wdt: Fix compilation problem 2019-02-27 10:08:52 +01:00
xen pvcalls-front: fix potential null dereference 2019-02-27 10:08:56 +01:00
zorro
Kconfig
Makefile