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2b7eec2ec3
Using the kernel param earlyprintk=xdbc,keep without proper hardware
setup leads to this:
[ ] xhci_dbc:early_xdbc_parse_parameter: dbgp_num: 0
...
[ ] xhci_dbc:early_xdbc_setup_hardware: failed to setup the connection to host
...
[ ] calling kmemleak_late_init+0x0/0xa0 @ 1
[ ] kmemleak: Kernel memory leak detector initialized (mem pool available: 14919)
[ ] kmemleak: Automatic memory scanning thread started
[ ] initcall kmemleak_late_init+0x0/0xa0 returned 0 after 417 usecs
[ ] calling check_early_ioremap_leak+0x0/0x70 @ 1
[ ] ------------[ cut here ]------------
[ ] Debug warning: early ioremap leak of 1 areas detected.
please boot with early_ioremap_debug and report the dmesg.
[ ] WARNING: CPU: 11 PID: 1 at mm/early_ioremap.c:90 check_early_ioremap_leak+0x4e/0x70
When early_xdbc_setup_hardware() fails, make sure to call
early_iounmap() since xdbc_init() won't handle it.
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
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.