Yannick Vignon 8a7cb245cf net: stmmac: Do not enable RX FIFO overflow interrupts ... The RX FIFO overflows when the system is not able to process all received packets and they start accumulating (first in the DMA queue in memory, then in the FIFO). An interrupt is then raised for each overflowing packet and handled in stmmac_interrupt(). This is counter-productive, since it brings the system (or more likely, one CPU core) to its knees to process the FIFO overflow interrupts. stmmac_interrupt() handles overflow interrupts by writing the rx tail ptr into the corresponding hardware register (according to the MAC spec, this has the effect of restarting the MAC DMA). However, without freeing any rx descriptors, the DMA stops right away, and another overflow interrupt is raised as the FIFO overflows again. Since the DMA is already restarted at the end of stmmac_rx_refill() after freeing descriptors, disabling FIFO overflow interrupts and the corresponding handling code has no side effect, and eliminates the interrupt storm when the RX FIFO overflows. Signed-off-by: Yannick Vignon <yannick.vignon@nxp.com> Link: https://lore.kernel.org/r/20210506143312.20784-1-yannick.vignon@oss.nxp.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>		2021-05-07 15:53:57 -07:00
..
accessibility	TTY/Serial driver updates for 5.13-rc1	2021-04-26 11:20:10 -07:00
acpi	CFI on arm64 series for v5.13-rc1	2021-04-27 10:16:46 -07:00
amba
android	selinux/stable-5.13 PR 20210426	2021-04-27 13:42:11 -07:00
ata	SCSI misc on 20210428	2021-04-28 17:22:10 -07:00
atm	Networking changes for 5.13.	2021-04-29 11:57:23 -07:00
auxdisplay
base	regmap: Updates for v5.13	2021-04-26 16:21:16 -07:00
bcma	bcma: remove unused function	2021-04-18 09:36:56 +03:00
block	for-5.13/drivers-2021-04-27	2021-04-28 14:39:37 -07:00
bluetooth	Networking changes for 5.13.	2021-04-29 11:57:23 -07:00
bus	ARM: SoC drivers for v5.13	2021-04-26 12:11:52 -07:00
cdrom	gdrom: fix compilation error	2021-04-11 19:32:06 -06:00
char	A bunch of little cleanups	2021-04-28 15:54:57 -07:00
clk	Here's a collection of largely clk driver updates for the merge window. The	2021-04-28 17:13:56 -07:00
clocksource	ARM: platform support for Apple M1	2021-04-26 12:30:36 -07:00
comedi	staging: comedi: move out of staging directory	2021-04-15 09:26:25 +02:00
connector
counter
cpufreq	Power management updates for 5.13-rc1	2021-04-26 15:10:25 -07:00
cpuidle	Merge back earlier cpuidle updates for v5.13.	2021-04-08 20:05:49 +02:00
crypto	Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6	2021-04-26 08:51:23 -07:00
cxl	cxl/mem: Fix memory device capacity probing	2021-04-16 18:21:56 -07:00
dax
dca
devfreq	PM / devfreq: imx8m-ddrc: Remove unneeded of_match_ptr()	2021-04-08 13:14:51 +09:00
dio
dma	ARM: SoC drivers for v5.13	2021-04-26 12:11:52 -07:00
dma-buf	drm/syncobj: use newly allocated stub fences	2021-04-08 12:21:13 +02:00
edac
eisa
extcon	- Core Frameworks	2021-04-28 15:59:13 -07:00
firewire	The usual updates from the irq departement:	2021-04-26 09:43:16 -07:00
firmware	- removed get_fs/set_fs	2021-04-29 11:28:08 -07:00
fpga	ARM: SoC drivers for v5.13	2021-04-26 12:11:52 -07:00
fsi
gnss
gpio	- Core Frameworks	2021-04-28 15:59:13 -07:00
gpu	VFIO updates for v5.13-rc1	2021-04-28 17:19:47 -07:00
greybus	greybus: es2: fix kernel-doc warnings	2021-04-16 07:26:50 +02:00
hid
hsi	HSI: core: fix resource leaks in hsi_add_client_from_dt()	2021-04-16 00:14:49 +02:00
hv	printk changes for 5.13	2021-04-27 18:09:44 -07:00
hwmon	ACPI updates for 5.13-rc1	2021-04-26 15:03:23 -07:00
hwspinlock
hwtracing	coresight: etm-perf: Fix define build issue when built as module	2021-04-16 09:34:57 +02:00
i2c	- Core Frameworks	2021-04-28 15:59:13 -07:00
i3c
ide
idle	intel_idle: add Iclelake-D support	2021-04-08 19:18:07 +02:00
iio	spi: Updates for v5.13	2021-04-26 16:32:11 -07:00
infiniband	Networking changes for 5.13.	2021-04-29 11:57:23 -07:00
input	- Core Frameworks	2021-04-28 15:59:13 -07:00
interconnect	CFI on arm64 series for v5.13-rc1	2021-04-27 10:16:46 -07:00
iommu
ipack
irqchip	- removed get_fs/set_fs	2021-04-29 11:28:08 -07:00
isdn
leds	treewide: change my e-mail address, fix my name	2021-04-09 14:54:23 -07:00
lightnvm	lightnvm: deprecated OCSSD support and schedule it for removal in Linux 5.15	2021-04-13 09:16:12 -06:00
macintosh
mailbox	- qcom: enable support for SM8350 and SC7280	2021-04-28 16:10:33 -07:00
mcb
md	for-5.13/drivers-2021-04-27	2021-04-28 14:39:37 -07:00
media	drm for 5.13-rc1	2021-04-28 10:01:40 -07:00
memory	Power management updates for 5.13-rc1	2021-04-26 15:10:25 -07:00
memstick	memstick: r592: ignore kfifo_out() return code again	2021-04-26 11:08:23 +02:00
message	scsi: message: fusion: Remove unused local variable 'vtarget'	2021-04-13 01:39:12 -04:00
mfd	- Core Frameworks	2021-04-28 15:59:13 -07:00
misc	CFI on arm64 series for v5.13-rc1	2021-04-27 10:16:46 -07:00
mmc	MMC core:	2021-04-28 15:56:51 -07:00
most	Staging/IIO driver updates for 5.13-rc1	2021-04-26 11:14:21 -07:00
mtd	printk changes for 5.13	2021-04-27 18:09:44 -07:00
mux	mux: gpio: Simplify code by using dev_err_probe()	2021-04-02 16:28:53 +02:00
net	net: stmmac: Do not enable RX FIFO overflow interrupts	2021-05-07 15:53:57 -07:00
nfc	nfc: st-nci: remove unnecessary label	2021-04-13 14:50:57 -07:00
ntb
nubus
nvdimm	libnvdimm/region: Fix nvdimm_has_flush() to handle ND_REGION_ASYNC	2021-04-09 21:56:01 -07:00
nvme	for-5.13/drivers-2021-04-27	2021-04-28 14:39:37 -07:00
nvmem	nvmem: qfprom: Add support for fuse blowing on sc7280	2021-04-02 16:28:10 +02:00
of	Networking changes for 5.13.	2021-04-29 11:57:23 -07:00
opp
parisc
parport
pci	Networking changes for 5.13.	2021-04-29 11:57:23 -07:00
pcmcia
perf
phy	Networking changes for 5.13.	2021-04-29 11:57:23 -07:00
pinctrl	ARM: SoC drivers for v5.13	2021-04-26 12:11:52 -07:00
platform	USB/Thunderbolt patches for 5.13-rc1	2021-04-26 11:32:23 -07:00
pnp
power	power supply and reset changes for the v5.13 series	2021-04-28 15:43:58 -07:00
powercap
pps	TTY/Serial driver updates for 5.13-rc1	2021-04-26 11:20:10 -07:00
ps3
ptp
pwm	- Core Frameworks	2021-04-28 15:59:13 -07:00
rapidio
ras	RAS/CEC: Correct ce_add_elem()'s returned values	2021-04-07 11:52:26 +02:00
regulator	- Core Frameworks	2021-04-28 15:59:13 -07:00
remoteproc
reset	ARM SCMI updates for v5.13	2021-04-08 17:38:20 +02:00
rpmsg
rtc	- Core Frameworks	2021-04-28 15:59:13 -07:00
s390	Networking changes for 5.13.	2021-04-29 11:57:23 -07:00
sbus
scsi	Networking changes for 5.13.	2021-04-29 11:57:23 -07:00
sh	The usual updates from the irq departement:	2021-04-26 09:43:16 -07:00
siox
slimbus
soc	ARM: SoC drivers for v5.13	2021-04-26 12:11:52 -07:00
soundwire	soundwire: intel_init: test link->cdns	2021-04-06 10:26:44 +05:30
spi	CFI on arm64 series for v5.13-rc1	2021-04-27 10:16:46 -07:00
spmi
ssb
staging	Networking changes for 5.13.	2021-04-29 11:57:23 -07:00
target	SCSI misc on 20210428	2021-04-28 17:22:10 -07:00
tc
tee	ARM: SoC drivers for v5.13	2021-04-26 12:11:52 -07:00
thermal
thunderbolt	thunderbolt: Changes for v5.13 merge window	2021-04-13 12:17:14 +02:00
tty	Power management updates for 5.13-rc1	2021-04-26 15:10:25 -07:00
uio
usb	SCSI misc on 20210428	2021-04-28 17:22:10 -07:00
vdpa	vdpa/mlx5: Set err = -ENOMEM in case dma_map_sg_attrs fails	2021-04-22 18:15:31 -04:00
vfio	VFIO updates for v5.13-rc1	2021-04-28 17:19:47 -07:00
vhost	SCSI misc on 20210428	2021-04-28 17:22:10 -07:00
video	- New Device Support	2021-04-28 16:02:58 -07:00
virt
virtio
visorbus
vlynq
vme
w1	w1: ds28e17: Use module_w1_family to simplify the code	2021-04-10 10:58:21 +02:00
watchdog	- Core Frameworks	2021-04-28 15:59:13 -07:00
xen	SCSI misc on 20210428	2021-04-28 17:22:10 -07:00
zorro
Kconfig	staging: comedi: move out of staging directory	2021-04-15 09:26:25 +02:00
Makefile	staging: comedi: move out of staging directory	2021-04-15 09:26:25 +02:00