wlan: Introduce HDD Request Manager infrastructure
qcacld-3.0 to prima propagation.
Many operations within the wlan driver occur in an asynchronous
manner. Requests are received by HDD via one of the kernel interfaces
(ioctl, nl80211, virtual file system, etc.). The requests are
translated to an internal format and are then passed to lower layers
for processing. For requests which require a response, that response
comes up from the lower layers in a separate thread of execution,
ultimately resulting in a call to a callback function that was
provided by HDD as part of the initial request. So a mechanism is
needed to synchronize the request and response.
Currently there are various mechanisms which perform these
synchronizations, but experience with them has revealed some flaws. So
a universal mechanism is needed to synchronize the request and
response which addresses all of the known flaws. This framework
provides that mechanism.
Issue: SEC-1813
Change-Id: If4d5912710f8a3b5e87adf76f828a646b7cc2983
CRs-Fixed: 2205457
(cherry picked from commit b22e99861f394c1ca366d62a3ff923c4c71f91a6)
4 files changed