Armen Ratner 66d25bb8ab net/mlx5e: Preserve shared buffer capacity during headroom updates ... [ Upstream commit 8b0587a885fdb34fd6090a3f8625cb7ac1444826 ] When port buffer headroom changes, port_update_shared_buffer() recalculates the shared buffer size and splits it in a 3:1 ratio (lossy:lossless) - Currently, the calculation is: lossless = shared / 4; lossy = (shared / 4) * 3; Meaning, the calculation dropped the remainder of shared % 4 due to integer division, unintentionally reducing the total shared buffer by up to three cells on each update. Over time, this could shrink the buffer below usable size. Fix it by changing the calculation to: lossless = shared / 4; lossy = shared - lossless; This retains all buffer cells while still approximating the intended 3:1 split, preventing capacity loss over time. While at it, perform headroom calculations in units of cells rather than in bytes for more accurate calculations avoiding extra divisions. Fixes: a440030d89 ("net/mlx5e: Update shared buffer along with device buffer changes") Signed-off-by: Armen Ratner <armeng@nvidia.com> Signed-off-by: Maher Sanalla <msanalla@nvidia.com> Reviewed-by: Tariq Toukan <tariqt@nvidia.com> Signed-off-by: Alexei Lazar <alazar@nvidia.com> Signed-off-by: Mark Bloch <mbloch@nvidia.com> Reviewed-by: Przemek Kitszel <przemyslaw.kitszel@intel.com> Link: https://patch.msgid.link/20250820133209.389065-9-mbloch@nvidia.com Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>		2025-08-28 16:31:16 +02:00
..
accel	accel/habanalabs/gaudi2: Use kvfree() for memory allocated with kvcalloc()	2025-08-28 16:31:06 +02:00
accessibility
acpi	ACPI: pfr_update: Fix the driver update version check	2025-08-28 16:31:03 +02:00
amba
android
ata	ata: libata-scsi: Return aborted command when missing sense and result TF	2025-08-28 16:31:04 +02:00
atm	atm: idt77252: Add missing dma_map_error()	2025-07-17 18:37:20 +02:00
auxdisplay
base	PM: runtime: Take active children into account in pm_runtime_get_if_in_use()	2025-08-28 16:30:53 +02:00
bcma
block	drbd: add missing kref_get in handle_write_conflicts	2025-08-20 18:30:20 +02:00
bluetooth	Bluetooth: btmtk: Fix wait_on_bit_timeout interruption during shutdown	2025-08-28 16:31:13 +02:00
bus	bus: mhi: host: Detect events pointing to unexpected TREs	2025-08-28 16:30:54 +02:00
cache
cdrom
cdx	cdx: Fix off-by-one error in cdx_rpmsg_probe()	2025-08-28 16:31:09 +02:00
char	ipmi: Fix strcpy source and destination the same	2025-08-20 18:30:48 +02:00
clk	clk: qcom: gcc-ipq8074: fix broken freq table for nss_port6_tx_clk_src	2025-08-20 18:30:51 +02:00
clocksource	clocksource: mips-gic-timer: Enable counter when CPUs start	2025-05-29 11:02:41 +02:00
comedi	comedi: Fix use of uninitialized memory in do_insn_ioctl() and do_insnlist_ioctl()	2025-08-28 16:31:09 +02:00
connector
counter	counter: interrupt-cnt: Protect enable/disable OPs with mutex	2025-06-19 15:32:12 +02:00
cpufreq	cpufreq: armada-8k: Fix off by one in armada_8k_cpufreq_free_table()	2025-08-28 16:30:53 +02:00
cpuidle	cpuidle: governors: menu: Avoid selecting states with too much latency	2025-08-28 16:31:08 +02:00
crypto	crypto: octeontx2 - Fix address alignment on CN10KB and CN10KA-B0	2025-08-28 16:30:55 +02:00
cxl	cxl/region: Add a dev_err() on missing target list entries	2025-07-06 11:01:32 +02:00
dax
dca
devfreq	PM / devfreq: governor: Replace sscanf() with kstrtoul() in set_freq_store()	2025-08-20 18:30:23 +02:00
dio
dma	dmaengine: stm32-dma: configure next sg only if there are more than 2 sgs	2025-08-20 18:30:43 +02:00
dma-buf	dma-buf: fix timeout handling in dma_resv_wait_timeout v2	2025-07-10 16:05:12 +02:00
dpll
edac	EDAC/synopsys: Clear the ECC counters on init	2025-08-20 18:30:23 +02:00
eisa
extcon
firewire
firmware	firmware: arm_scmi: Convert to SYSTEM_SLEEP_PM_OPS	2025-08-20 18:30:58 +02:00
fpga	fpga: zynq_fpga: Fix the wrong usage of dma_map_sgtable()	2025-08-28 16:31:08 +02:00
fsi
gnss
gpio	gpio: tps65912: check the return value of regmap_update_bits()	2025-08-20 18:30:24 +02:00
gpu	drm/amd/display: Don't print errors for nonexistent connectors	2025-08-28 16:31:14 +02:00
greybus
hid	HID: apple: avoid setting up battery timer for devices without battery	2025-08-20 18:30:56 +02:00
hsi
hte
hv	Drivers: hv: Make the sysfs node size for the ring buffer dynamic	2025-08-01 09:48:47 +01:00
hwmon	hwmon: (gsc-hwmon) fix fan pwm setpoint show functions	2025-08-28 16:30:58 +02:00
hwspinlock
hwtracing	coresight: Only check bottom two claim bits	2025-07-06 11:01:34 +02:00
i2c	i2c: Force DLL0945 touchpad i2c freq to 100khz	2025-08-20 18:30:47 +02:00
i3c	i3c: master: Initialize ret in i3c_i2c_notifier_call()	2025-08-20 18:30:46 +02:00
idle	intel_idle: Allow loading ACPI tables for any family	2025-08-20 18:30:18 +02:00
iio	iio: imu: inv_icm42600: change invalid data error to -EBUSY	2025-08-28 16:31:11 +02:00
infiniband	RDMA/hns: Fix dip entries leak on devices newer than hip09	2025-08-28 16:31:12 +02:00
input	Input: gpio-keys - fix a sleep while atomic with PREEMPT_RT	2025-08-01 09:48:39 +01:00
interconnect	interconnect: qcom: sc8180x: specify num_nodes	2025-08-15 12:13:38 +02:00
iommu	iommu/amd: Avoid stack buffer overflow from kernel cmdline	2025-08-28 16:31:13 +02:00
ipack
irqchip	irqchip: Build IMX_MU_MSI only on ARM	2025-08-15 12:14:07 +02:00
isdn
leds	leds: leds-lp50xx: Handle reg to get correct multi_index	2025-08-20 18:30:43 +02:00
macintosh
mailbox	mailbox: Not protect module_put with spin_lock_irqsave	2025-07-06 11:01:32 +02:00
mcb
md	dm: Check for forbidden splitting of zone write operations	2025-08-28 16:30:53 +02:00
media	media: venus: venc: Clamp param smaller than 1fps and bigger than 240	2025-08-28 16:31:01 +02:00
memory
memstick	memstick: Fix deadlock by moving removing flag earlier	2025-08-28 16:31:05 +02:00
message
mfd	mfd: cros_ec: Separate charge-control probing from USB-PD	2025-08-20 18:30:56 +02:00
misc	misc: rtsx: usb: Ensure mmc child device is active when card is present	2025-08-20 18:30:52 +02:00
mmc	mmc: sdhci_am654: Disable HS400 for AM62P SR1.0 and SR1.1	2025-08-28 16:31:08 +02:00
most	most: core: Drop device reference after usage in get_channel()	2025-08-28 16:31:09 +02:00
mtd	mtd: rawnand: renesas: Add missing check after DMA map	2025-08-28 16:30:58 +02:00
mux
net	net/mlx5e: Preserve shared buffer capacity during headroom updates	2025-08-28 16:31:16 +02:00
nfc
ntb
nubus
nvdimm
nvme	nvme-tcp: log TLS handshake failures at error level	2025-08-20 18:30:19 +02:00
nvmem	nvmem: layouts: u-boot-env: remove crc32 endianness conversion	2025-07-24 08:56:21 +02:00
of	of: unittest: Unlock on error in unittest_data_add()	2025-06-19 15:31:48 +02:00
opp
parisc
parport
pci	PCI: rockchip: Set Target Link Speed to 5.0 GT/s before retraining	2025-08-28 16:31:07 +02:00
pcmcia
peci
perf	perf/arm: Add missing .suppress_bind_attrs	2025-08-20 18:30:33 +02:00
phy	phy: qcom: phy-qcom-m31: Update IPQ5332 M31 USB phy initialization sequence	2025-08-28 16:30:59 +02:00
pinctrl	pinctrl: stm32: Manage irq affinity settings	2025-08-20 18:30:44 +02:00
platform	platform/x86/intel-uncore-freq: Check write blocked for ELC	2025-08-28 16:31:06 +02:00
pmdomain	imx8m-blk-ctrl: set ISI panic write hurry level	2025-08-20 18:30:27 +02:00
pnp
power	power: supply: qcom_battmgr: Add lithium-polymer entry	2025-08-20 18:30:44 +02:00
powercap	powercap: dtpm_cpu: Fix NULL pointer dereference in get_pd_power_uw()	2025-08-15 12:13:36 +02:00
pps	pps: clients: gpio: fix interrupt handling order in remove path	2025-08-20 18:30:25 +02:00
ps3
ptp	ptp: Use ratelimite for freerun error message	2025-08-20 18:30:38 +02:00
pwm	pwm: mediatek: Fix duty and period setting	2025-08-28 16:30:58 +02:00
rapidio	drivers/rapidio/rio_cm.c: prevent possible heap overwrite	2025-06-27 11:11:36 +01:00
ras
regulator	regulator: core: fix NULL dereference on unbind due to stale coupling data	2025-08-01 09:48:39 +01:00
remoteproc	remoteproc: imx_rproc: skip clock enable when M-core is managed by the SCU	2025-08-20 18:30:22 +02:00
reset	reset: brcmstb: Enable reset drivers for ARCH_BCM2835	2025-08-20 18:30:25 +02:00
rpmsg	rpmsg: qcom_smd: Fix uninitialized return variable in __qcom_smd_send()	2025-06-19 15:32:06 +02:00
rtc	rtc: ds1307: remove clear of oscillator stop flag (OSF) in probe	2025-08-20 18:30:50 +02:00
s390	s390/sclp: Fix SCCB present check	2025-08-28 16:31:06 +02:00
sbus
scsi	scsi: qla4xxx: Prevent a potential error pointer dereference	2025-08-28 16:31:13 +02:00
sh
siox
slimbus
soc	soc: qcom: mdt_loader: Fix error return values in mdt_header_valid()	2025-08-28 16:31:07 +02:00
soundwire	soundwire: Move handle_nested_irq outside of sdw_dev_lock	2025-08-20 18:30:46 +02:00
spi	spi: spi-fsl-lpspi: Clamp too high speed_hz	2025-08-28 16:31:11 +02:00
spmi
ssb
staging	media: imx: fix a potential memory leak in imx_media_csc_scaler_device_init()	2025-08-28 16:31:00 +02:00
target	scsi: target: core: Generate correct identifiers for PR OUT transport IDs	2025-08-20 18:30:48 +02:00
tc
tee	optee: ffa: fix sleep in atomic context	2025-07-10 16:05:12 +02:00
thermal	thermal: sysfs: Return ENODATA instead of EAGAIN for reads	2025-08-20 18:30:24 +02:00
thunderbolt	thunderbolt: Fix copy+paste error in match_service_id()	2025-08-20 18:30:52 +02:00
tty	vt: defkeymap: Map keycodes above 127 to K_HOLE	2025-08-28 16:30:54 +02:00
ufs	scsi: ufs: ufs-pci: Fix default runtime and system PM levels	2025-08-28 16:30:57 +02:00
uio	uio_hv_generic: Align ring size to system page	2025-06-27 11:11:25 +01:00
usb	usb: dwc3: pci: add support for the Intel Wildcat Lake	2025-08-28 16:31:10 +02:00
vdpa	vdpa: Fix IDR memory leak in VDUSE module exit	2025-08-15 12:13:58 +02:00
vfio	vfio/mlx5: fix possible overflow in tracking max message size	2025-08-20 18:30:48 +02:00
vhost	vhost/vsock: Avoid allocating arbitrarily-sized SKBs	2025-08-28 16:30:59 +02:00
video	Revert "vgacon: Add check for vc_origin address range in vgacon_scroll()"	2025-08-28 16:30:55 +02:00
virt	fix locking in efi_secret_unlink()	2025-08-20 18:30:21 +02:00
virtio	virtio_ring: Fix error reporting in virtqueue_resize	2025-08-01 09:48:39 +01:00
w1
watchdog	watchdog: iTCO_wdt: Report error if timeout configuration fails	2025-08-20 18:30:42 +02:00
xen	xen/gntdev: remove struct gntdev_copy_batch from stack	2025-08-15 12:13:43 +02:00
zorro
Kconfig
Makefile