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Filename Latest commit message Latest commit date
Jakub Vanek 5fc6ace75c Revert "usb: dwc3: core: Enable AutoRetry feature in the controller" 
commit 734ae15ab95a18d3d425fc9cb38b7a627d786f08 upstream.

This reverts commit b138e23d3d.

AutoRetry has been found to sometimes cause controller freezes when
communicating with buggy USB devices.

This controller feature allows the controller in host mode to send
non-terminating/burst retry ACKs instead of terminating retry ACKs
to devices when a transaction error (CRC error or overflow) occurs.

Unfortunately, if the USB device continues to respond with a CRC error,
the controller will not complete endpoint-related commands while it
keeps trying to auto-retry. [3] The xHCI driver will notice this once
it tries to abort the transfer using a Stop Endpoint command and
does not receive a completion in time. [1]
This situation is reported to dmesg:

[sda] tag#29 uas_eh_abort_handler 0 uas-tag 1 inflight: CMD IN
[sda] tag#29 CDB: opcode=0x28 28 00 00 69 42 80 00 00 48 00
xhci-hcd: xHCI host not responding to stop endpoint command
xhci-hcd: xHCI host controller not responding, assume dead
xhci-hcd: HC died; cleaning up

Some users observed this problem on an Odroid HC2 with the JMS578
USB3-to-SATA bridge. The issue can be triggered by starting
a read-heavy workload on an attached SSD. After a while, the host
controller would die and the SSD would disappear from the system. [1]

Further analysis by Synopsys determined that controller revisions
other than the one in Odroid HC2 are also affected by this.
The recommended solution was to disable AutoRetry altogether.
This change does not have a noticeable performance impact. [2]

Revert the enablement commit. This will keep the AutoRetry bit in
the default state configured during SoC design [2].

Fixes: b138e23d3d ("usb: dwc3: core: Enable AutoRetry feature in the controller")
Link: https://lore.kernel.org/r/a21f34c04632d250cd0a78c7c6f4a1c9c7a43142.camel@gmail.com/ [1]
Link: https://lore.kernel.org/r/20230711214834.kyr6ulync32d4ktk@synopsys.com/ [2]
Link: https://lore.kernel.org/r/20230712225518.2smu7wse6djc7l5o@synopsys.com/ [3]
Cc: stable@vger.kernel.org
Cc: Mauro Ribeiro <mauro.ribeiro@hardkernel.com>
Cc: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Suggested-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Signed-off-by: Jakub Vanek <linuxtardis@gmail.com>
Acked-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Link: https://lore.kernel.org/r/20230714122419.27741-1-linuxtardis@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-08-11 11:53:51 +02:00
arch
block
certs
crypto
Documentation
drivers Revert "usb: dwc3: core: Enable AutoRetry feature in the controller" 2023-08-11 11:53:51 +02:00
fs ext4: fix to check return value of freeze_bdev() in ext4_shutdown() 2023-08-11 11:53:47 +02:00
include block: Fix a source code comment in include/uapi/linux/blkzoned.h 2023-08-11 11:53:49 +02:00
init
ipc
kernel tracing: Fix warning in trace_buffered_event_disable() 2023-08-11 11:53:50 +02:00
lib
LICENSES
mm
net net/sched: mqprio: Add length check for TCA_MQPRIO_{MAX/MIN}_RATE64 2023-08-11 11:53:48 +02:00
samples
scripts
security keys: Fix linking a duplicate key to a keyring's assoc_array 2023-08-11 11:53:47 +02:00
sound ASoC: fsl_spdif: Silence output on stop 2023-08-11 11:53:49 +02:00
tools
usr
virt
.clang-format
.cocciconfig
.get_maintainer.ignore
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COPYING
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Kbuild
Kconfig
MAINTAINERS
Makefile Linux 5.4.252 2023-08-08 19:56:37 +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.