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Ville Syrjälä de5eb6b65e wifi: iwlwifi: Fix firmware version handling 
commit ca58982229 upstream.

On my system the arithmetic done on the firmware numbers
results in a negative number, but since the types are
unsigned it gets interpreted as a large positive number.

The end result is that the firmware gets rejected and wifi
is defunct.

Switch to signed types to handle this case correctly.

iwlwifi 0000:0c:00.0: Driver unable to support your firmware API. Driver supports FW core 4294967294..2, firmware is 2.
iwlwifi 0000:0c:00.0: Direct firmware load for iwlwifi-5000-4.ucode failed with error -2
iwlwifi 0000:0c:00.0: Direct firmware load for iwlwifi-5000-3.ucode failed with error -2
iwlwifi 0000:0c:00.0: Direct firmware load for iwlwifi-5000-2.ucode failed with error -2
iwlwifi 0000:0c:00.0: Direct firmware load for iwlwifi-5000-1.ucode failed with error -2
iwlwifi 0000:0c:00.0: no suitable firmware found!
iwlwifi 0000:0c:00.0: minimum version required: iwlwifi-5000-1
iwlwifi 0000:0c:00.0: maximum version supported: iwlwifi-5000-5
iwlwifi 0000:0c:00.0: check git://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git

Cc: stable@vger.kernel.org
Fixes: 5f708cccde ("wifi: iwlwifi: add a new FW file numbering scheme")
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Closes: https://bugzilla.kernel.org/show_bug.cgi?id=220805
Link: https://patch.msgid.link/20251113222852.15896-1-ville.syrjala@linux.intel.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
History 2026-01-08 10:17:12 +01:00
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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 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.