nl80211: vendor command support

Add support for vendor-specific commands to nl80211. This is
intended to be used for really vendor-specific functionality
that can't be implemented in a generic fashion for any reason.
It's *NOT* intended to be used for any normal/generic feature
or any optimisations that could be implemented across drivers.
Currently, only vendor commands (with replies) are supported,
no dump operations or vendor-specific notifications.
Also add a function wdev_to_ieee80211_vif() to mac80211 which
is needed for mac80211-based drivers wanting to implement any
vendor commands.

Change-Id: Ic4729180ea31b39e7313633f216a06b96a29ee39
CRs-fixed: 576020
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Git-commit: ad7e718c9b4f717823fd920a0103f7b0fb06183f
Git-repo: https://git.kernel.org/cgit/linux/kernel/git/linville/wireless-next.git
Signed-off-by: Leo Chang <leochang@codeaurora.org>

Conflicts:
	include/linux/nl80211.h
	net/wireless/nl80211.c
nl80211: support vendor-specific events

In addition to vendor-specific commands, also support vendor-specific
events. These must be registered with cfg80211 before they can be used.
They're also advertised in nl80211 in the wiphy information so that
userspace knows can be expected. The events themselves are sent on a
new multicast group called "vendor".

Change-Id: I184aaa9f9e8461aee572f7d0a35916cd668c2218
CRs-fixed: 576020
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Git-commit: 567ffc3509b2d3f965a49a18631d3da7f9a96d4f
Git-repo: https://git.kernel.org/cgit/linux/kernel/git/linville/wireless-next.git
Signed-off-by: Leo Chang <leochang@codeaurora.org>
nl80211: Correct the usage of command NL80211_CMD_VENDOR

Assign/pass the cur_cmd_info parameter correctly. This fixes a
merge error when open source commit
ad7e718c9b4f717823fd920a0103f7b0fb06183f was pulled into the tree.

CRs-Fixed: 672390
Change-Id: Iaa21a1723709683a6f34b07423b74ef0b6077b68
Signed-off-by: Sunil Dutt <usdutt@codeaurora.org>
Enable NEED_NETDEV for vendor command support.

The Vendor command needs to have the NEED_NETDEV internal flag set
for the corresponding vendor_cmd function to initialize correctly
and call the vendor subcommand specific doit function.

CRs-fixed: 633799
Change-Id: Icc46438dc9467fe0344cb832633c49466e2d20d0
Signed-off-by: Subhani Shaik <subhanis@codeaurora.org>
nl80211: nl80211hdr_put() doesn't return an ERR_PTR

There are a few places which check nl80211hdr_put() for an ERR_PTR
but actually it returns NULL on error and never error values.  In
nl80211_testmode_dump() the return wasn't checked at all so I have
added one.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
[some whitespace changes]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Git-commit: cb35fba360dfc3496e5d8a47e23ec5ccdfd90925
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
[akholaif@codeaurora.org: resolved conflicts manually]
Change-Id: I5da1aafea35110a1ce606d402b1b96859d34b869
Signed-off-by: Ahmad Kholaif <akholaif@codeaurora.org>
nl80211: fix error path in nl80211_get_key()

Coverity pointed out that in the (practically impossible)
error case we leak the message - fix this.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Git-commit: 9fe271af7d4de96471c5aaee2f4d0d1576050497
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
Change-Id: I78c3631eabd04e86872faf65fa1e401dadb35a75
Signed-off-by: Ahmad Kholaif <akholaif@codeaurora.org>