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Niklas Cassel f2aac4c73c ata: libata-core: Add ATA_QUIRK_NO_LPM_ON_ATI for certain Samsung SSDs 
Before commit 7627a0edef ("ata: ahci: Drop low power policy board type")
the ATI AHCI controllers specified board type 'board_ahci' rather than
board type 'board_ahci'. This means that LPM was historically not enabled
for the ATI AHCI controllers.

By looking at commit 7a8526a5cd ("libata: Add ATA_HORKAGE_NO_NCQ_ON_ATI
for Samsung 860 and 870 SSD."), it is clear that, for some unknown reason,
that Samsung SSDs do not play nice with ATI AHCI controllers. (When using
other AHCI controllers, NCQ can be enabled on these Samsung SSDs without
issues.)

In a similar way, from user reports, it is clear the ATI AHCI controllers
can enable LPM on e.g. Maxtor HDDs perfectly fine, but when enabling LPM
on certain Samsung SSDs, things break. (E.g. the SSDs will not get detected
by the ATI AHCI controller even after a COMRESET.)

Yet, when using LPM on these Samsung SSDs with other AHCI controllers, e.g.
Intel AHCI controllers, these Samsung drives appear to work perfectly fine.

Considering that the combination of ATI + Samsung, for some unknown reason,
does not seem to work well, disable LPM when detecting an ATI AHCI
controller with a problematic Samsung SSD.

Apply this new ATA_QUIRK_NO_LPM_ON_ATI quirk for all Samsung SSDs that have
already been reported to not play nice with ATI (ATA_QUIRK_NO_NCQ_ON_ATI).

Fixes: 7627a0edef ("ata: ahci: Drop low power policy board type")
Suggested-by: Hans de Goede <hdegoede@redhat.com>
Reported-by: Eric <eric.4.debian@grabatoulnz.fr>
Closes: https://lore.kernel.org/linux-ide/Z8SBZMBjvVXA7OAK@eldamar.lan/
Tested-by: Eric <eric.4.debian@grabatoulnz.fr>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Link: https://lore.kernel.org/r/20250317170348.1748671-2-cassel@kernel.org
Signed-off-by: Niklas Cassel <cassel@kernel.org>
2025-03-18 10:11:28 +01:00
arch i2c-for-6.13-rc1-part3 2024-12-01 13:38:24 -08:00
block block-6.13-20242901 2024-11-30 15:47:29 -08:00
certs sign-file,extract-cert: use pkcs11 provider for OPENSSL MAJOR >= 3 2024-09-20 19:52:48 +03:00
crypto Random number generator updates for Linux 6.13-rc1. 2024-11-19 10:43:44 -08:00
Documentation - Move the ->select callback to the correct ops structure in irq-mvebu-sei to 2024-12-01 12:37:58 -08:00
drivers ata: libata-core: Add ATA_QUIRK_NO_LPM_ON_ATI for certain Samsung SSDs 2025-03-18 10:11:28 +01:00
fs This pull request contains the following changes for UML: 2024-11-30 10:34:54 -08:00
include ata: libata-core: Add ATA_QUIRK_NO_LPM_ON_ATI for certain Samsung SSDs 2025-03-18 10:11:28 +01:00
init - The series "resource: A couple of cleanups" from Andy Shevchenko 2024-11-25 16:09:48 -08:00
io_uring io_uring-6.13-20242901 2024-11-30 15:43:02 -08:00
ipc - The series "resource: A couple of cleanups" from Andy Shevchenko 2024-11-25 16:09:48 -08:00
kernel - Fix a case where posix timers with a thread-group-wide target would miss 2024-12-01 12:41:21 -08:00
lib vsnprintf: Removal of bprintf() 2024-12-01 13:10:51 -08:00
LICENSES LICENSES: add 0BSD license text 2024-09-01 20:43:24 -07:00
mm Kbuild updates for v6.13 2024-11-30 13:41:50 -08:00
net 9p update for 6.13-rc1 2024-11-30 10:28:14 -08:00
rust block-6.13-20242901 2024-11-30 15:47:29 -08:00
samples TTY / Serial driver updates for 6.13-rc1 2024-11-30 09:03:16 -08:00
scripts Kbuild updates for v6.13 2024-11-30 13:41:50 -08:00
security lsm/stable-6.13 PR 20241129 2024-11-30 18:14:56 -08:00
sound sound fixes for 6.13-rc1 2024-11-29 13:01:05 -08:00
tools turbostat version 2024.11.30 2024-11-30 18:30:22 -08:00
usr initramfs: shorten cmd_initfs in usr/Makefile 2024-07-16 01:07:52 +09:00
virt VFIO updates for v6.13 2024-11-27 12:57:03 -08:00
.clang-format clang-format: Update with v6.11-rc1's for_each macro list 2024-08-02 13:20:31 +02:00
.clippy.toml rust: enable Clippy's check-private-items 2024-10-07 21:39:57 +02:00
.cocciconfig scripts: add Linux .cocciconfig for coccinelle 2016-07-22 12:13:39 +02:00
.editorconfig .editorconfig: remove trim_trailing_whitespace option 2024-06-13 16:47:52 +02:00
.get_maintainer.ignore MAINTAINERS: Retire Ralf Baechle 2024-11-12 15:48:59 +01:00
.gitattributes .gitattributes: set diff driver for Rust source code files 2023-05-31 17:48:25 +02:00
.gitignore Kbuild updates for v6.13 2024-11-30 13:41:50 -08:00
.mailmap media updates for v6.13-rc1 2024-11-20 14:01:15 -08:00
.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 cgroup: Changes for v6.13 2024-11-20 09:54:49 -08:00
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 i2c-for-6.13-rc1-part3 2024-12-01 13:38:24 -08:00
Makefile Linux 6.13-rc1 2024-12-01 14:28:56 -08:00
README README: Fix spelling 2024-03-18 03:36:32 -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 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.