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168873ca17soc-generic-dmaengine-pcm.c uses same dev for both CPU and Platform.
In such case, CPU component driver might not have driver->name, then
snd_soc_lookup_component_nolocked() will be NULL pointer access error.
Care NULL driver name.
Call trace:
strcmp from snd_soc_lookup_component_nolocked+0x64/0xa4
snd_soc_lookup_component_nolocked from snd_soc_unregister_component_by_driver+0x2c/0x44
snd_soc_unregister_component_by_driver from snd_dmaengine_pcm_unregister+0x28/0x64
snd_dmaengine_pcm_unregister from devres_release_all+0x98/0xfc
devres_release_all from device_unbind_cleanup+0xc/0x60
device_unbind_cleanup from really_probe+0x220/0x2c8
really_probe from __driver_probe_device+0x88/0x1a0
__driver_probe_device from driver_probe_device+0x30/0x110
driver_probe_device from __driver_attach+0x90/0x178
__driver_attach from bus_for_each_dev+0x7c/0xcc
bus_for_each_dev from bus_add_driver+0xcc/0x1ec
bus_add_driver from driver_register+0x80/0x11c
driver_register from do_one_initcall+0x58/0x23c
do_one_initcall from kernel_init_freeable+0x198/0x1f4
kernel_init_freeable from kernel_init+0x1c/0x12c
kernel_init from ret_from_fork+0x14/0x28
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.