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Filename Latest commit message Latest commit date
Adrian Hunter d8f7e15a65 mmc: sdhci-pci: Fix eMMC driver strength for BYT-based controllers 
commit 1a8eb6b373c2af6533c13d1ea11f504e5010ed9a upstream.

BIOS writers have begun the practice of setting 40 ohm eMMC driver strength
even though the eMMC may not support it, on the assumption that the kernel
will validate the value against the eMMC (Extended CSD DRIVER_STRENGTH
[offset 197]) and revert to the default 50 ohm value if 40 ohm is invalid.

This is done to avoid changing the value for different boards.

Putting aside the merits of this approach, it is clear the eMMC's mask
of supported driver strengths is more reliable than the value provided
by BIOS. Add validation accordingly.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Fixes: 51ced59cc0 ("mmc: sdhci-pci: Use ACPI DSM to get driver strength for some Intel devices")
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20200422111629.4899-1-adrian.hunter@intel.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-05-06 08:15:06 +02:00
arch arm64: Delete the space separator in __emit_inst 2020-05-02 08:48:58 +02:00
block blk-mq: Put driver tag in blk_mq_dispatch_rq_list() when no budget 2020-05-02 08:48:59 +02:00
certs
crypto
Documentation USB: hub: Revert commit bd0e6c9614 ("usb: hub: try old enumeration scheme first for high speed devices") 2020-04-29 16:33:14 +02:00
drivers mmc: sdhci-pci: Fix eMMC driver strength for BYT-based controllers 2020-05-06 08:15:06 +02:00
fs btrfs: transaction: Avoid deadlock due to bad initialization timing of fs_info::journal_info 2020-05-06 08:15:06 +02:00
include NFSv4.1: fix handling of backchannel binding in BIND_CONN_TO_SESSION 2020-05-06 08:15:05 +02:00
init printk: queue wake_up_klogd irq_work only if per-CPU areas are ready 2020-05-02 08:48:42 +02:00
ipc
kernel signal: check sig before setting info in kill_pid_usb_asyncio 2020-05-02 08:48:55 +02:00
lib
LICENSES
mm mm: shmem: disable interrupt when acquiring info->lock in userfaultfd_copy path 2020-05-02 08:48:54 +02:00
net net: use indirect call wrappers for skb_copy_datagram_iter() 2020-05-02 08:49:00 +02:00
samples vmalloc: fix remap_vmalloc_range() bounds checks 2020-04-29 16:33:14 +02:00
scripts kbuild: fix DT binding schema rule again to avoid needless rebuilds 2020-05-02 08:48:42 +02:00
security
sound Revert "ASoC: meson: axg-card: fix codec-to-codec link setup" 2020-05-02 17:26:47 +02:00
tools objtool: Support Clang non-section symbols in ORC dump 2020-05-02 08:48:57 +02:00
usr
virt
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS
Makefile Linux 5.4.38 2020-05-02 17:26:50 +02:00
README

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 Restructured Text 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.