tree 279b481556f973f19f605955abe1876474969a5e
parent 6641489072fb5414a18c964c913a163c043f296e
author Hanumanth Reddy Pothula <c_hpothu@codeaurora.org> 1521018147 +0530
committer Gerrit - the friendly Code Review server <code-review@localhost> 1522147637 -0700

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.

Change-Id: If4d5912710f8a3b5e87adf76f828a646b7cc2983
CRs-Fixed: 2205457