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a4faee0117
When unbind and bind the device again, kernel will dump below warning:
[ 173.972130] sysfs: cannot create duplicate filename '/devices/platform/soc/4c010010.usb/software_node'
[ 173.981564] CPU: 2 UID: 0 PID: 536 Comm: sh Not tainted 6.12.0-rc6-06344-g2aed7c4a5c56 #144
[ 173.989923] Hardware name: NXP i.MX95 15X15 board (DT)
[ 173.995062] Call trace:
[ 173.997509] dump_backtrace+0x90/0xe8
[ 174.001196] show_stack+0x18/0x24
[ 174.004524] dump_stack_lvl+0x74/0x8c
[ 174.008198] dump_stack+0x18/0x24
[ 174.011526] sysfs_warn_dup+0x64/0x80
[ 174.015201] sysfs_do_create_link_sd+0xf0/0xf8
[ 174.019656] sysfs_create_link+0x20/0x40
[ 174.023590] software_node_notify+0x90/0x100
[ 174.027872] device_create_managed_software_node+0xec/0x108
...
The '4c010010.usb' device is a platform device created during the initcall
and is never removed, which causes its associated software node to persist
indefinitely.
The existing device_create_managed_software_node() does not provide a
corresponding removal function.
Replace device_create_managed_software_node() with the
device_add_software_node() and device_remove_software_node() pair to ensure
proper addition and removal of software nodes, addressing this issue.
Fixes:
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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.