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8116483407While tinkering with ACPI work-arounds for the HP Omen 16 support, we
identified a corner case where the headset codec device properties are
not set in the codec .init when -EPROBE_DEFER is returned, but
released unconditionally in the .exit().
This leads to a kernel oops
[ 4.186891] sof_sdw sof_sdw: snd_soc_register_card failed -517
[ 4.186896] BUG: kernel NULL pointer dereference, address: 00000000000003f0
[ 4.186914] Oops: 0000 [#1] PREEMPT SMP NOPTI
[ 4.186926] RIP: 0010:dev_fwnode+0x5/0x20
[ 4.186974] device_remove_software_node+0x10/0x80
[ 4.186982] sof_sdw_rt711_exit+0x19/0x30 [snd_soc_sof_sdw]
[ 4.186990] mc_dailink_exit_loop+0x94/0xc0 [snd_soc_sof_sdw]
[ 4.186996] ? rt711_rtd_init+0x170/0x170 [snd_soc_sof_sdw]
A similar error case can occur if the addition of the device property
fails. We need to test if the property was successfully added before
removing it.
BugLink: https://github.com/thesofproject/linux/issues/3727
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 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.