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The kernel performs several regulatory checks for AP mode in nl80211/cfg80211. These checks include radar detection, verification of whether the sub-channel is disabled, and an examination to determine if the channel is a DFS channel (both DFS usable and DFS available). These checks are performed across a frequency range, examining each sub-channel. However, these checks are also performed on subchannels that have been punctured which should not be examined as they are not in use. This leads to the issue where the AP stops because one of the 20 MHz sub-channels is disabled or radar detected on the channel, even when the sub-channel is punctured. To address this issue, add a condition check wherever regulatory checks exist for AP mode in nl80211/cfg80211. This check identifies punctured channels and, upon finding them, skips the regulatory checks for those channels. Co-developed-by: Manaswini Paluri <quic_mpaluri@quicinc.com> Signed-off-by: Manaswini Paluri <quic_mpaluri@quicinc.com> Signed-off-by: Kavita Kavita <quic_kkavita@quicinc.com> Link: https://patch.msgid.link/20250109050409.25351-1-quic_kkavita@quicinc.com Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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.