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Niklas Cassel f3132336db PCI: dwc: Fix msg_atu_index assignment 
[ Upstream commit 58fbf08935 ]

When dw_pcie_iatu_setup() configures outbound address translation for both
type PCIE_ATU_TYPE_MEM and PCIE_ATU_TYPE_IO, the iATU index to use is
incremented before calling dw_pcie_prog_outbound_atu().

However for msg_atu_index, the index is not incremented before use,
causing the iATU index to be the same as the last configured iATU index,
which means that it will incorrectly use the same iATU index that is
already in use, breaking outbound address translation.

In total there are three problems with this code:
-It assigns msg_atu_index the same index that was used for the last
 outbound address translation window, rather than incrementing the index
 before assignment.
-The index should only be incremented (and msg_atu_index assigned) if the
 use_atu_msg feature is actually requested/in use (pp->use_atu_msg is set).
-If the use_atu_msg feature is requested/in use, and there are no outbound
 iATUs available, the code should return an error, as otherwise when this
 this feature is used, it will use an iATU index that is out of bounds.

Fixes: e1a4ec1a95 ("PCI: dwc: Add generic MSG TLP support for sending PME_Turn_Off when system suspend")
Signed-off-by: Niklas Cassel <cassel@kernel.org>
Signed-off-by: Manivannan Sadhasivam <mani@kernel.org>
Tested-by: Maciej W. Rozycki <macro@orcam.me.uk>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Hans Zhang <zhanghuabing@ecosda.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Reviewed-by: Shawn Lin <shawn.lin@rock-chips.com>
Cc: stable@vger.kernel.org
Link: https://patch.msgid.link/20260127151038.1484881-6-cassel@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2026-03-04 07:21:53 -05:00
arch arm64: Fix non-atomic __READ_ONCE() with CONFIG_LTO=y 2026-03-04 07:21:52 -05:00
block block: decouple secure erase size limit from discard size limit 2026-03-04 07:20:56 -05:00
certs sign-file,extract-cert: use pkcs11 provider for OPENSSL MAJOR >= 3 2024-09-20 19:52:48 +03:00
crypto crypto: authencesn - reject too-short AAD (assoclen<8) to match ESP/ESN spec 2026-01-30 10:28:39 +01:00
Documentation ASoC: dt-bindings: asahi-kasei,ak5558: Fix the supply names 2026-03-04 07:20:48 -05:00
drivers PCI: dwc: Fix msg_atu_index assignment 2026-03-04 07:21:53 -05:00
fs btrfs: continue trimming remaining devices on failure 2026-03-04 07:21:52 -05:00
include drm: of: drm_of_panel_bridge_remove(): fix device_node leak 2026-03-04 07:21:46 -05:00
init init: handle bootloader identifier in kernel parameters 2025-10-19 16:33:50 +02:00
io_uring io_uring/net: don't continue send bundle if poll was required for retry 2026-03-04 07:21:50 -05:00
ipc ipc: don't audit capability check in ipc_permissions() 2026-03-04 07:20:07 -05:00
kernel kexec: derive purgatory entry from symbol 2026-03-04 07:21:51 -05:00
lib Remove WARN_ALL_UNSEEDED_RANDOM kernel config option 2026-03-04 07:21:32 -05:00
LICENSES LICENSES: add 0BSD license text 2024-09-01 20:43:24 -07:00
mm mm/slab: use unsigned long for orig_size to ensure proper metadata align 2026-03-04 07:21:52 -05:00
net netfilter: nf_conntrack_h323: fix OOB read in decode_choice() 2026-03-04 07:21:35 -05:00
rust rust: rbtree: fix documentation typo in CursorMut peek_next method 2026-02-06 16:55:44 +01:00
samples samples/ftrace: Adjust LoongArch register restore order in direct calls 2026-01-08 10:14:50 +01:00
scripts modpost: Amend ppc64 save/restfpr symnames for -Os build 2026-03-04 07:21:09 -05:00
security apparmor: fix aa_label to return state from compount and component match 2026-03-04 07:20:41 -05:00
sound ASoC: SOF: ipc4-control: Keep the payload size up to date 2026-03-04 07:21:36 -05:00
tools tools: Fix bitfield dependency failure 2026-03-04 07:21:50 -05:00
usr kbuild: uapi: Strip comments before size type check 2025-11-13 15:34:35 -05:00
virt KVM: Don't clobber irqfd routing type when deassigning irqfd 2026-02-11 13:40:17 +01:00
.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: give Clippy the minimum supported Rust version 2025-08-01 09:48:44 +01:00
.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 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 rust: introduce .clippy.toml 2025-03-13 13:01:42 +01:00
.mailmap mailmap: add entry for Thorsten Blum 2024-11-07 14:14:59 -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 MAINTAINERS: Remove self from DSA entry 2024-11-03 12:52:38 -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 gpiolib-acpi: Update file references in the Documentation and MAINTAINERS 2026-02-11 13:40:29 +01:00
Makefile kbuild: Add objtool to top-level clean target 2026-03-04 07:20:35 -05:00
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.