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Matthias Schiffer e44894e2aa net: dsa: mv88e6xxx: Avoid EEPROM timeout without EEPROM on 88E6250-family switches
88E6250-family switches have the quirk that the EEPROM Running flag can
get stuck at 1 when no EEPROM is connected, causing
mv88e6xxx_g2_eeprom_wait() to time out. We still want to wait for the
EEPROM however, to avoid interrupting a transfer and leaving the EEPROM
in an invalid state.

The condition to wait for recommended by the hardware spec is the EEInt
flag, however this flag is cleared on read, so before the hardware reset,
is may have been cleared already even though the EEPROM has been read
successfully.

For this reason, we revive the mv88e6xxx_g1_wait_eeprom_done() function
that was removed in commit 6ccf50d4d4
("net: dsa: mv88e6xxx: Avoid EEPROM timeout when EEPROM is absent") in a
slightly refactored form, and introduce a new
mv88e6xxx_g1_wait_eeprom_done_prereset() that additionally handles this
case by triggering another EEPROM reload that can be waited on.

On other switch models without this quirk, mv88e6xxx_g2_eeprom_wait() is
kept, as it avoids the additional reload.

Fixes: 6ccf50d4d4 ("net: dsa: mv88e6xxx: Avoid EEPROM timeout when EEPROM is absent")
Signed-off-by: Matthias Schiffer <matthias.schiffer@ew.tq-group.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
2024-04-25 11:24:07 +01:00
arch Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2024-04-18 13:12:24 -07:00
block block-6.9-20240412 2024-04-12 10:22:33 -07:00
certs This update includes the following changes: 2023-11-02 16:15:30 -10:00
crypto net: add sk_wake_async_rcu() helper 2024-03-29 15:03:11 -07:00
Documentation Merge branch '100GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/tnguy/next-queue 2024-04-24 20:05:31 -07:00
drivers net: dsa: mv88e6xxx: Avoid EEPROM timeout without EEPROM on 88E6250-family switches 2024-04-25 11:24:07 +01:00
fs Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2024-04-18 13:12:24 -07:00
include tcp: move tcp_skb_cb->sacked flags to enum 2024-04-25 08:52:12 +01:00
init fs/proc: Skip bootloader comment if no embedded kernel parameters 2024-04-09 23:36:18 +09:00
io_uring net: extend ubuf_info callback to ops structure 2024-04-22 16:21:35 -07:00
ipc sysctl: treewide: constify ctl_table_header::ctl_table_arg 2024-04-22 08:56:31 +01:00
kernel sysctl: treewide: constify ctl_table_header::ctl_table_arg 2024-04-22 08:56:31 +01:00
lib net: dqs: make struct dql more cache efficient 2024-04-15 11:19:53 -07:00
LICENSES LICENSES: Add the copyleft-next-0.3.1 license 2022-11-08 15:44:01 +01:00
mm x86/mm/pat: fix VM_PAT handling in COW mappings 2024-04-05 11:21:31 -07:00
net tcp: update sacked after tracepoint in __tcp_retransmit_skb 2024-04-25 08:52:12 +01:00
rust Kbuild updates for v6.9 2024-03-21 14:41:00 -07:00
samples Tracing updates for 6.9: 2024-03-18 15:11:44 -07:00
scripts Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2024-04-11 14:23:47 -07:00
security security: Place security_path_post_mknod() where the original IMA call was 2024-04-03 10:21:32 -07:00
sound ASoC: Fixes for v6.9 2024-04-05 08:48:12 +02:00
tools selftests: net: extract BPF building logic from the Makefile 2024-04-24 20:15:45 -07:00
usr Kbuild updates for v6.8 2024-01-18 17:57:07 -08:00
virt KVM Xen and pfncache changes for 6.9: 2024-03-11 10:42:55 -04:00
.clang-format clang-format: Update with v6.7-rc4's for_each macro list 2023-12-08 23:54:38 +01:00
.cocciconfig scripts: add Linux .cocciconfig for coccinelle 2016-07-22 12:13:39 +02:00
.editorconfig Add .editorconfig file for basic formatting 2023-12-28 16:22:47 +09:00
.get_maintainer.ignore Add Jeff Kirsher to .get_maintainer.ignore 2024-03-08 11:36:54 +00:00
.gitattributes .gitattributes: set diff driver for Rust source code files 2023-05-31 17:48:25 +02:00
.gitignore kbuild: create a list of all built DTB files 2024-02-19 18:20:39 +09:00
.mailmap MAINTAINERS: change vmware.com addresses to broadcom.com 2024-04-05 11:21:31 -07:00
.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 MAINTAINERS: Drop Gustavo Pimentel as PCI DWC Maintainer 2024-03-27 13:41:02 -05:00
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 MAINTAINERS: Add myself to pse networking maintainer 2024-04-18 18:27:02 -07:00
Makefile Linux 6.9-rc4 2024-04-14 13:38:39 -07:00
README README: Fix spelling 2024-03-18 03:36:32 -06:00

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 reStructuredText 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.