kernel/linux
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ synced 2026-10-26 19:14:18 +00:00
Code Issues Releases Packages Activity
No description
1,313,057 commits 117 branches 5,805 tags 5.9 GiB
  • C 96.8%
  • Assembly 0.9%
  • Rust 0.7%
  • Shell 0.6%
  • Python 0.5%
  • Other 0.3%
Find a file
Andy Shevchenko 5dd8884493 dmaengine: dw: Select only supported masters for ACPI devices 
commit f0e870a0e9 upstream.

The recently submitted fix-commit revealed a problem in the iDMA 32-bit
platform code. Even though the controller supported only a single master
the dw_dma_acpi_filter() method hard-coded two master interfaces with IDs
0 and 1. As a result the sanity check implemented in the commit
b336268dde ("dmaengine: dw: Add peripheral bus width verification")
got incorrect interface data width and thus prevented the client drivers
from configuring the DMA-channel with the EINVAL error returned. E.g.,
the next error was printed for the PXA2xx SPI controller driver trying
to configure the requested channels:

> [  164.525604] pxa2xx_spi_pci 0000:00:07.1: DMA slave config failed
> [  164.536105] pxa2xx_spi_pci 0000:00:07.1: failed to get DMA TX descriptor
> [  164.543213] spidev spi-SPT0001:00: SPI transfer failed: -16

The problem would have been spotted much earlier if the iDMA 32-bit
controller supported more than one master interfaces. But since it
supports just a single master and the iDMA 32-bit specific code just
ignores the master IDs in the CTLLO preparation method, the issue has
been gone unnoticed so far.

Fix the problem by specifying the default master ID for both memory
and peripheral devices in the driver data. Thus the issue noticed for
the iDMA 32-bit controllers will be eliminated and the ACPI-probed
DW DMA controllers will be configured with the correct master ID by
default.

Cc: stable@vger.kernel.org
Fixes: b336268dde ("dmaengine: dw: Add peripheral bus width verification")
Fixes: 199244d694 ("dmaengine: dw: add support of iDMA 32-bit hardware")
Reported-by: Ferry Toth <fntoth@gmail.com>
Closes: https://lore.kernel.org/dmaengine/ZuXbCKUs1iOqFu51@black.fi.intel.com/
Reported-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Closes: https://lore.kernel.org/dmaengine/ZuXgI-VcHpMgbZ91@black.fi.intel.com/
Tested-by: Ferry Toth <fntoth@gmail.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20241104095142.157925-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
History 2025-01-02 10:34:13 +01:00
arch arm64: dts: broadcom: Fix L2 linesize for Raspberry Pi 5 2025-01-02 10:34:10 +01:00
block block: avoid to reuse hctx not removed from cpuhp callback list 2024-12-27 14:02:12 +01:00
certs sign-file,extract-cert: use pkcs11 provider for OPENSSL MAJOR >= 3 2024-09-20 19:52:48 +03:00
crypto crypto: ecdsa - Avoid signed integer overflow on signature decoding 2024-12-14 20:03:36 +01:00
Documentation Documentation: networking: Add a caveat to nexthop_compat_mode sysctl 2024-12-19 18:13:16 +01:00
drivers dmaengine: dw: Select only supported masters for ACPI devices 2025-01-02 10:34:13 +01:00
fs nfsd: restore callback functionality for NFSv4.0 2025-01-02 10:34:11 +01:00
include tcp_bpf: Add sk_rmem_alloc related logic for tcp_bpf ingress redirection 2025-01-02 10:34:11 +01:00
init Compiler Attributes: disable __counted_by for clang < 19.1.3 2024-12-05 14:02:45 +01:00
io_uring io_uring: check if iowq is killed before queuing 2024-12-27 14:02:17 +01:00
ipc ipc: fix memleak if msg_init_ns failed in create_ipc_ns 2024-12-05 14:03:02 +01:00
kernel fork: avoid inappropriate uprobe access to invalid mm 2025-01-02 10:34:10 +01:00
lib timekeeping: Remove CONFIG_DEBUG_TIMEKEEPING 2024-12-14 20:04:16 +01:00
LICENSES LICENSES: add 0BSD license text 2024-09-01 20:43:24 -07:00
mm mm: convert partially_mapped set/clear operations to be atomic 2024-12-27 14:02:20 +01:00
net bpf: Check negative offsets in __bpf_skb_min_len() 2025-01-02 10:34:11 +01:00
rust rust: kbuild: set bindgen's Rust target version 2024-12-19 18:13:22 +01:00
samples samples/bpf: Fix a resource leak 2024-12-14 20:03:46 +01:00
scripts setlocalversion: work around "git describe" performance 2024-12-14 20:04:10 +01:00
security apparmor: test: Fix memory leak for aa_unpack_strdup() 2024-12-05 14:02:46 +01:00
sound ALSA: memalloc: prefer dma_mapping_error() over explicit address checking 2025-01-02 10:34:13 +01:00
tools selftests/bpf: Fix compilation error in get_uprobe_offset() 2025-01-02 10:34:10 +01:00
usr initramfs: shorten cmd_initfs in usr/Makefile 2024-07-16 01:07:52 +09:00
virt KVM: x86: switch hugepage recovery thread to vhost_task 2024-12-05 14:02:43 +01:00
.clang-format clang-format: Update with v6.11-rc1's for_each macro list 2024-08-02 13:20:31 +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 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 updates for v6.12 2024-09-24 13:02:06 -07:00
.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 MAINTAINERS: update location of media main tree 2024-12-05 14:02:42 +01:00
Makefile Linux 6.12.7 2024-12-27 14:02:20 +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.