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Carlos Song cf40c73ab2 i2c: imx-lpi2c: change to PIO mode in system-wide suspend/resume progress 
[ Upstream commit f2a3f51365 ]

EDMA resumes early and suspends late in the system power transition
sequence, while LPI2C enters the NOIRQ stage for both suspend and resume.
This means LPI2C resources become available before EDMA is fully resumed.
Once IRQs are enabled, a slave device may immediately trigger an LPI2C
transfer. If the transfer length meets DMA requirements, the driver will
attempt to use EDMA even though EDMA may still be unavailable.

This timing gap can lead to transfer failures. To prevent this, force
LPI2C to use PIO mode during system-wide suspend and resume transitions.
This reduces dependency on EDMA and avoids using an unready DMA resource.

Fixes: a09c8b3f90 ("i2c: imx-lpi2c: add eDMA mode support for LPI2C")
Signed-off-by: Carlos Song <carlos.song@nxp.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2026-01-23 11:21:22 +01:00
arch mips: fix HIGHMEM initialization 2026-01-23 11:21:20 +01:00
block block: zero non-PI portion of auto integrity buffer 2026-01-23 11:21:16 +01:00
certs sign-file,extract-cert: use pkcs11 provider for OPENSSL MAJOR >= 3 2024-09-20 19:52:48 +03:00
crypto crypto: seqiv - Do not use req->iv after crypto_aead_encrypt 2026-01-08 10:16:43 +01:00
Documentation dt-bindings: PCI: qcom,pcie-sm8550: Add missing required power-domains and resets 2026-01-02 12:57:27 +01:00
drivers i2c: imx-lpi2c: change to PIO mode in system-wide suspend/resume progress 2026-01-23 11:21:22 +01:00
fs NFS: Fix size read races in truncate, fallocate and copy offload 2026-01-23 11:21:20 +01:00
include mm, kfence: describe @slab parameter in __kfence_obj_info() 2026-01-23 11:21:20 +01:00
init printk changes for 6.18 2025-10-04 11:13:11 -07:00
io_uring io_uring: move local task_work in exit cancel loop 2026-01-23 11:21:13 +01:00
ipc namespace-6.18-rc1 2025-09-29 11:20:29 -07:00
kernel trace: ftrace_dump_on_oops[] is not exported, make it static 2026-01-17 16:35:29 +01:00
lib lib/crypto: aes: Fix missing MMU protection for AES S-box 2026-01-17 16:35:12 +01:00
LICENSES LICENSES: Replace the obsolete address of the FSF in the GFDL-1.2 2025-07-24 11:15:39 +02:00
mm mm/damon/tests/core-kunit: handle alloc failures on damon_test_split_regions_of() 2026-01-08 10:17:21 +01:00
net net/sched: sch_qfq: do not free existing class in qfq_change_class() 2026-01-23 11:21:18 +01:00
rust rust: bitops: fix missing _find_* functions on 32-bit ARM 2026-01-23 11:21:12 +01:00
samples samples/ftrace: Adjust LoongArch register restore order in direct calls 2026-01-08 10:17:11 +01:00
scripts mcb: Add missing modpost build support 2026-01-08 10:16:47 +01:00
security landlock: Fix wrong type usage 2026-01-23 11:21:22 +01:00
sound ASoC: tlv320adcx140: fix word length 2026-01-23 11:21:19 +01:00
tools selftests/landlock: Properly close a file descriptor 2026-01-23 11:21:22 +01:00
usr gen_init_cpio: Ignore fsync() returning EINVAL on pipes 2025-10-07 09:53:05 -07:00
virt KVM: Fix last_boosted_vcpu index assignment bug 2026-01-02 12:57:21 +01:00
.clang-format memblock: drop for_each_free_mem_pfn_range_in_zone_from() 2025-09-14 08:49:03 +03:00
.clippy.toml rust: clean Rust 1.88.0's warning about clippy::disallowed_macros configuration 2025-05-07 00:11:47 +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: remove Alyssa Rosenzweig 2025-09-18 21:17:31 +02:00
.gitattributes .gitattributes: set diff driver for Rust source code files 2023-05-31 17:48:25 +02:00
.gitignore .gitignore: ignore compile_commands.json globally 2025-08-12 15:53:55 -07:00
.mailmap 8 hotfixes. 4 are cc:stable, 7 are against mm/. 2025-11-26 12:38:05 -08:00
.pylintrc tools: docs: parse-headers.py: move it from sphinx dir 2025-08-29 15:54:42 -06:00
.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: mark ISDN subsystem as orphan 2025-10-27 17:49:45 -07:00
Kbuild sched: Make migrate_{en,dis}able() inline 2025-09-25 09:57:16 +02:00
Kconfig io_uring: Rename KConfig to Kconfig 2025-02-19 14:53:27 -07:00
MAINTAINERS soc: fixes for 6.18, part 4 2025-11-28 09:57:31 -08:00
Makefile Linux 6.18.6 2026-01-17 16:35:34 +01:00
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.