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Abhishek Chauhan d783451a49 net: stmmac: Programming sequence for VLAN packets with split header [ Upstream commit `d10f1a4e44` ] Currently reset state configuration of split header works fine for non-tagged packets and we see no corruption in payload of any size We need additional programming sequence with reset configuration to handle VLAN tagged packets to avoid corruption in payload for packets of size greater than 256 bytes. Without this change ping application complains about corruption in payload when the size of the VLAN packet exceeds 256 bytes. With this change tagged and non-tagged packets of any size works fine and there is no corruption seen. Current configuration which has the issue for VLAN packet ---------------------------------------------------------- Split happens at the position at Layer 3 header \|MAC-DA\|MAC-SA\|Vlan Tag\|Ether type\|IP header\|IP data\|Rest of the payload\| 2 bytes ^ \| With the fix we are making sure that the split happens now at Layer 2 which is end of ethernet header and start of IP payload Ip traffic split ----------------- Bits which take care of this are SPLM and SPLOFST SPLM = Split mode is set to Layer 2 SPLOFST = These bits indicate the value of offset from the beginning of Length/Type field at which header split should take place when the appropriate SPLM is selected. Reset value is 2bytes. Un-tagged data (without VLAN) \|MAC-DA\|MAC-SA\|Ether type\|IP header\|IP data\|Rest of the payload\| 2bytes ^ \| Tagged data (with VLAN) \|MAC-DA\|MAC-SA\|VLAN Tag\|Ether type\|IP header\|IP data\|Rest of the payload\| 2bytes ^ \| Non-IP traffic split such AV packet ------------------------------------ Bits which take care of this are SAVE = Split AV Enable SAVO = Split AV Offset, similar to SPLOFST but this is for AVTP packets. \|Preamble\|MAC-DA\|MAC-SA\|VLAN tag\|Ether type\|IEEE 1722 payload\|CRC\| 2bytes ^ \| Signed-off-by: Abhishek Chauhan <quic_abchauha@quicinc.com> Reviewed-by: Simon Horman <horms@kernel.org> Link: https://patch.msgid.link/20241016234313.3992214-1-quic_abchauha@quicinc.com Signed-off-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: Sasha Levin <sashal@kernel.org>		History 2024-12-14 20:00:05 +01:00
arch	perf/x86/amd: Warn only on new bits set	2024-12-14 19:59:59 +01:00
block	block, bfq: fix bfqq uaf in bfq_limit_depth()	2024-12-09 10:33:00 +01:00
certs	certs: Reference revocation list for all keyrings	2023-08-17 20:12:41 +00:00
crypto	crypto: pcrypt - Call crypto layer directly when padata_do_parallel() return -EBUSY	2024-12-09 10:31:48 +01:00
Documentation	zram: split memory-tracking and ac-time tracking	2024-12-14 19:59:44 +01:00
drivers	net: stmmac: Programming sequence for VLAN packets with split header	2024-12-14 20:00:05 +01:00
fs	fanotify: allow reporting errors on failure to open fd	2024-12-14 20:00:05 +01:00
include	fanotify: allow reporting errors on failure to open fd	2024-12-14 20:00:05 +01:00
init	Compiler Attributes: disable __counted_by for clang < 19.1.3	2024-12-09 10:32:46 +01:00
io_uring	io_uring: fix possible deadlock in io_register_iowq_max_workers()	2024-11-17 15:08:58 +01:00
ipc	ipc: fix memleak if msg_init_ns failed in create_ipc_ns	2024-12-09 10:32:54 +01:00
kernel	kcsan: Turn report_filterlist_lock into a raw_spinlock	2024-12-14 19:59:59 +01:00
lib	lib: stackinit: hide never-taken branch from compiler	2024-12-14 19:59:57 +01:00
LICENSES	LICENSES: Add the copyleft-next-0.3.1 license	2022-11-08 15:44:01 +01:00
mm	kasan: make report_lock a raw spinlock	2024-12-14 19:59:57 +01:00
net	net: inet6: do not leave a dangling sk pointer in inet6_create()	2024-12-14 20:00:04 +01:00
rust	rust: macros: fix documentation of the paste! macro	2024-12-09 10:32:25 +01:00
samples	samples/bpf: Fix a resource leak	2024-12-14 20:00:03 +01:00
scripts	modpost: Add .irqentry.text to OTHER_SECTIONS	2024-12-14 19:59:56 +01:00
security	apparmor: test: Fix memory leak for aa_unpack_strdup()	2024-12-09 10:32:45 +01:00
sound	ALSA: hda/conexant: Use the new codec SSID matching	2024-12-14 20:00:03 +01:00
tools	selftests/resctrl: Protect against array overflow when reading strings	2024-12-14 20:00:01 +01:00
usr	initramfs: Encode dependency on KBUILD_BUILD_TIMESTAMP	2023-06-06 17:54:49 +09:00
virt	KVM: Use dedicated mutex to protect kvm_usage_count to avoid deadlock	2024-10-04 16:29:47 +02:00
.clang-format	iommu: Add for_each_group_device()	2023-05-23 08:15:51 +02:00
.cocciconfig	scripts: add Linux .cocciconfig for coccinelle	2016-07-22 12:13:39 +02:00
.get_maintainer.ignore	get_maintainer: add Alan to .get_maintainer.ignore	2022-08-20 15:17:44 -07:00
.gitattributes	.gitattributes: set diff driver for Rust source code files	2023-05-31 17:48:25 +02:00
.gitignore	Remove *.orig pattern from .gitignore	2024-10-04 16:29:44 +02:00
.mailmap	20 hotfixes. 12 are cc:stable and the remainder address post-6.5 issues	2023-10-24 09:52:16 -10:00
.rustfmt.toml	rust: add `.rustfmt.toml`	2022-09-28 09:02:20 +02:00
COPYING	COPYING: state that all contributions really are covered by this file	2020-02-10 13:32:20 -08:00
CREDITS	USB: Remove Wireless USB and UWB documentation	2023-08-09 14:17:32 +02:00
Kbuild	Kbuild updates for v6.1	2022-10-10 12:00:45 -07:00
Kconfig	kbuild: ensure full rebuild when the compiler is updated	2020-05-12 13:28:33 +09:00
MAINTAINERS	membarrier: riscv: Add full memory barrier in switch_mm()	2024-09-12 11:11:45 +02:00
Makefile	Linux 6.6.65	2024-12-11 16:13:43 +01:00
README	Drop all 00-INDEX files from Documentation/	2018-09-09 15:08:58 -06:00

README

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.