Jason Xing 6a471e5957 ixgbe: xsk: resolve the negative overflow of budget in ixgbe_xmit_zc ... [ Upstream commit 4d4d9ef9dfee877d494e5418f68a1016ef08cad6 ] Resolve the budget negative overflow which leads to returning true in ixgbe_xmit_zc even when the budget of descs are thoroughly consumed. Before this patch, when the budget is decreased to zero and finishes sending the last allowed desc in ixgbe_xmit_zc, it will always turn back and enter into the while() statement to see if it should keep processing packets, but in the meantime it unexpectedly decreases the value again to 'unsigned int (0--)', namely, UINT_MAX. Finally, the ixgbe_xmit_zc returns true, showing 'we complete cleaning the budget'. That also means 'clean_complete = true' in ixgbe_poll. The true theory behind this is if that budget number of descs are consumed, it implies that we might have more descs to be done. So we should return false in ixgbe_xmit_zc to tell napi poll to find another chance to start polling to handle the rest of descs. On the contrary, returning true here means job done and we know we finish all the possible descs this time and we don't intend to start a new napi poll. It is apparently against our expectations. Please also see how ixgbe_clean_tx_irq() handles the problem: it uses do..while() statement to make sure the budget can be decreased to zero at most and the negative overflow never happens. The patch adds 'likely' because we rarely would not hit the loop condition since the standard budget is 256. Fixes: 8221c5eba8 ("ixgbe: add AF_XDP zero-copy Tx support") Signed-off-by: Jason Xing <kernelxing@tencent.com> Reviewed-by: Larysa Zaremba <larysa.zaremba@intel.com> Reviewed-by: Paul Menzel <pmenzel@molgen.mpg.de> Reviewed-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com> Tested-by: Priya Singh <priyax.singh@intel.com> Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com> Link: https://patch.msgid.link/20250819222000.3504873-4-anthony.l.nguyen@intel.com Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>		2025-08-28 16:22:59 +02:00
..
accessibility
acpi	ACPI: processor: idle: Check acpi_fetch_acpi_dev() return value	2025-08-28 16:22:56 +02:00
amba
android
ata	ata: Fix SATA_MOBILE_LPM_POLICY description in Kconfig	2025-08-28 16:22:56 +02:00
atm	atm: idt77252: Add missing dma_map_error()	2025-07-17 18:27:59 +02:00
auxdisplay
base	pmdomain: governor: Consider CPU latency tolerance from pm_domain_cpu_gov	2025-08-28 16:22:53 +02:00
bcma
block	drbd: add missing kref_get in handle_write_conflicts	2025-08-28 16:22:39 +02:00
bluetooth	Bluetooth: btrtl: Prevent potential NULL dereference	2025-05-02 07:40:59 +02:00
bus	bus: mhi: host: Fix endianness of BHI vector table	2025-08-28 16:22:49 +02:00
cdrom
char	ipmi: Fix strcpy source and destination the same	2025-08-28 16:22:47 +02:00
clk	clk: sunxi-ng: v3s: Fix de clock definition	2025-08-28 16:22:34 +02:00
clocksource	clocksource: mips-gic-timer: Enable counter when CPUs start	2025-06-04 14:37:03 +02:00
connector
counter	counter: microchip-tcb-capture: Fix undefined counter channel state on probe	2025-04-10 14:30:54 +02:00
cpufreq	cpufreq: armada-8k: Fix off by one in armada_8k_cpufreq_free_table()	2025-08-28 16:22:48 +02:00
cpuidle	cpuidle: governors: menu: Avoid using invalid recent intervals data	2025-08-28 16:22:39 +02:00
crypto	crypto: qat - fix seq_file position update in adf_ring_next()	2025-08-28 16:22:35 +02:00
dax
dca
devfreq	PM / devfreq: governor: Replace sscanf() with kstrtoul() in set_freq_store()	2025-08-28 16:22:40 +02:00
dio
dma	dmaengine: nbpfaxi: Add missing check after DMA map	2025-08-28 16:22:35 +02:00
dma-buf	dma-buf: insert memory barrier before updating num_fences	2025-08-28 16:22:55 +02:00
edac	EDAC/altera: Use correct write width with the INTTEST register	2025-06-27 11:04:13 +01:00
eisa
extcon
firewire
firmware	firmware: SDEI: Allow sdei initialization without ACPI_APEI_GHES	2025-06-27 11:04:02 +01:00
fpga	fpga: zynq_fpga: Fix the wrong usage of dma_map_sgtable()	2025-08-28 16:22:52 +02:00
fsi
gnss
gpio	gpio: rcar: Use raw_spinlock to protect register access	2025-08-28 16:22:58 +02:00
gpu	drm/dp: Change AUX DPCD probe address from DPCD_REV to LANE0_1_STATUS	2025-08-28 16:22:57 +02:00
greybus
hid	HID: core: do not bypass hid_hw_raw_request	2025-08-28 16:22:27 +02:00
hsi	HSI: ssi_protocol: Fix use after free vulnerability in ssi_protocol Driver Due to Race Condition	2025-05-02 07:40:58 +02:00
hv	Drivers: hv: vmbus: Add utility function for querying ring size	2025-07-17 18:27:40 +02:00
hwmon	hwmon: (gsc-hwmon) fix fan pwm setpoint show functions	2025-08-28 16:22:50 +02:00
hwspinlock
hwtracing	coresight: catu: Fix number of pages while using 64k pages	2025-04-10 14:30:58 +02:00
i2c	i2c: Force DLL0945 touchpad i2c freq to 100khz	2025-08-28 16:22:46 +02:00
i3c	i3c: don't fail if GETHDRCAP is unsupported	2025-08-28 16:22:46 +02:00
ide
idle	intel_idle: Allow loading ACPI tables for any family	2025-08-28 16:22:39 +02:00
iio	iio: light: as73211: Ensure buffer holes are zeroed	2025-08-28 16:22:58 +02:00
infiniband	RDMA/bnxt_re: Fix to initialize the PBL array	2025-08-28 16:22:58 +02:00
input	Input: xpad - set correct controller type for Acer NGR200	2025-08-28 16:22:27 +02:00
interconnect
iommu	iommu/amd: Avoid stack buffer overflow from kernel cmdline	2025-08-28 16:22:59 +02:00
ipack
irqchip	irqchip/gic-v2m: Prevent use after free of gicv2m_get_fwnode()	2025-06-04 14:36:53 +02:00
isdn
leds	leds: leds-lp50xx: Handle reg to get correct multi_index	2025-08-28 16:22:45 +02:00
lightnvm
macintosh
mailbox	mailbox: Not protect module_put with spin_lock_irqsave	2025-07-17 18:27:36 +02:00
mcb	mcb: fix a double free bug in chameleon_parse_gdd()	2025-05-02 07:41:16 +02:00
md	dm rq: don't queue request to blk-mq during DM suspend	2025-08-28 16:22:58 +02:00
media	media: venus: vdec: Clamp param smaller than 1fps and bigger than 240.	2025-08-28 16:22:57 +02:00
memory
memstick	memstick: Fix deadlock by moving removing flag earlier	2025-08-28 16:22:51 +02:00
message
mfd	mfd: max14577: Fix wakeup source leaks on device unbind	2025-07-17 18:27:36 +02:00
misc	misc: rtsx: usb: Ensure mmc child device is active when card is present	2025-08-28 16:22:48 +02:00
mmc	mmc: sdhci-pci-gli: GL9763e: Rename the gli_set_gl9763e() for consistency	2025-08-28 16:22:51 +02:00
most	most: core: Drop device reference after usage in get_channel()	2025-08-28 16:22:52 +02:00
mtd	mtd: rawnand: fsmc: Add missing check after DMA map	2025-08-28 16:22:50 +02:00
mux
net	ixgbe: xsk: resolve the negative overflow of budget in ixgbe_xmit_zc	2025-08-28 16:22:59 +02:00
nfc
ntb	ntb: reduce stack usage in idt_scan_mws	2025-05-02 07:41:19 +02:00
nubus
nvdimm	libnvdimm/labels: Fix divide error in nd_label_data_init()	2025-06-04 14:36:59 +02:00
nvme	nvmet-tcp: don't restore null sk_state_change	2025-06-04 14:37:06 +02:00
nvmem	nvmem: core: improve range check for nvmem_cell_write()	2025-03-13 12:47:12 +01:00
of	of: module: add buffer overflow check in of_modalias()	2025-06-04 14:36:52 +02:00
opp
oprofile
parisc
parport	parport_pc: add support for ASIX AX99100	2025-03-13 12:47:23 +01:00
pci	PCI/ACPI: Fix runtime PM ref imbalance on Hot-Plug Capable ports	2025-08-28 16:22:54 +02:00
pcmcia
perf	perf/arm-cmn: Initialise cmn->cpu earlier	2025-06-04 14:37:09 +02:00
phy	phy: tegra: xusb: Fix unbalanced regulator disable in UTMI PHY mode	2025-08-28 16:22:26 +02:00
pinctrl	pinctrl: stm32: Manage irq affinity settings	2025-08-28 16:22:45 +02:00
platform	platform/chrome: cros_ec: Unregister notifier in cros_ec_unregister()	2025-08-28 16:22:56 +02:00
pnp
power	power: supply: max14577: Handle NULL pdata when CONFIG_OF is not set	2025-08-28 16:22:34 +02:00
powercap	powercap: call put_device() on an error path in powercap_register_control_type()	2025-04-10 14:30:49 +02:00
pps	pps: fix poll support	2025-08-28 16:22:31 +02:00
ps3
ptp	ptp: Fix possible memory leak in ptp_clock_register()	2025-08-28 16:22:54 +02:00
pwm	pwm: mediatek: Fix duty and period setting	2025-08-28 16:22:56 +02:00
rapidio	drivers/rapidio/rio_cm.c: prevent possible heap overwrite	2025-06-27 11:04:20 +01:00
ras
regulator	regulator: core: fix NULL dereference on unbind due to stale coupling data	2025-08-28 16:22:29 +02:00
remoteproc	remoteproc: qcom_q6v5_pas: Make single-PD handling more robust	2025-04-10 14:30:57 +02:00
reset	reset: brcmstb: Enable reset drivers for ARCH_BCM2835	2025-08-28 16:22:41 +02:00
rpmsg	rpmsg: qcom_smd: Fix uninitialized return variable in __qcom_smd_send()	2025-06-27 11:04:05 +01:00
rtc	rtc: ds1307: remove clear of oscillator stop flag (OSF) in probe	2025-08-28 16:22:47 +02:00
s390	scsi: s390: zfcp: Ensure synchronous unit_add	2025-06-27 11:04:20 +01:00
sbus
scsi	scsi: qla4xxx: Prevent a potential error pointer dereference	2025-08-28 16:22:58 +02:00
sfi
sh
siox
slimbus	slimbus: messaging: Free transaction ID in delayed interrupt scenario	2025-03-13 12:47:42 +01:00
soc	soc: qcom: mdt_loader: Ensure we don't read past the ELF header	2025-08-28 16:22:56 +02:00
soundwire	soundwire: stream: restore params when prepare ports fail	2025-08-28 16:22:34 +02:00
spi	spi: spi-fsl-dspi: Clear completion counter before initiating transfer	2025-07-17 18:27:46 +02:00
spmi
ssb
staging	comedi: Fail COMEDI_INSNLIST ioctl if n_insns is too large	2025-08-28 16:22:54 +02:00
target	scsi: target: Fix NULL pointer dereference in core_scsi3_decode_spec_i_port()	2025-07-17 18:27:48 +02:00
tc
tee	tee: Prevent size calculation wraparound on 32-bit kernels	2025-06-27 11:04:19 +01:00
thermal	thermal: sysfs: Return ENODATA instead of EAGAIN for reads	2025-08-28 16:22:41 +02:00
thunderbolt	thunderbolt: Fix copy+paste error in match_service_id()	2025-08-28 16:22:48 +02:00
tty	vt: defkeymap: Map keycodes above 127 to K_HOLE	2025-08-28 16:22:49 +02:00
uio	uio_hv_generic: Fix another memory leak in error handling paths	2025-08-28 16:22:57 +02:00
usb	usb: xhci: Fix slot_id resource race conflict	2025-08-28 16:22:58 +02:00
vdpa	vdpa/mlx5: Fix oversized null mkey longer than 32bit	2025-05-02 07:40:55 +02:00
vfio	vfio/type1: Fix error unwind in migration dirty bitmap allocation	2025-06-27 11:04:04 +01:00
vhost	vhost: fail early when __vhost_add_used() fails	2025-08-28 16:22:44 +02:00
video	Revert "vgacon: Add check for vc_origin address range in vgacon_scroll()"	2025-08-28 16:22:49 +02:00
virt
virtio
visorbus
vlynq
vme
w1
watchdog	watchdog: dw_wdt: Fix default timeout	2025-08-28 16:22:44 +02:00
xen	xen/gntdev: remove struct gntdev_copy_batch from stack	2025-08-28 16:22:33 +02:00
zorro
Kconfig
Makefile