staging: rtl8712: check for alloc fail in _r8712_init_recv_priv()

The function _r8712_init_recv_priv() and also r8712_init_recv_priv()
just returns silently if they fail to allocate memory. Change their
return type to int and add necessary checks and handling if they return
-ENOMEM

Tested-by: Philipp Hortmann <philipp.g.hortmann@gmail.com>
Signed-off-by: Nam Cao <namcaov@gmail.com>
Link: https://lore.kernel.org/r/506ac35a667e511db568b06b86834fd0ceeba453.1666688642.git.namcaov@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: rtl8712: r8712_recv_entry(): Change return type

Change return type of r8712_recv_entry from s32 to void as its return
value is never used. Modify or remove return statements accordingly.

Signed-off-by: Nishka Dasgupta <nishkadg.linux@gmail.com>
Link: https://lore.kernel.org/r/20190808064012.12661-4-nishkadg.linux@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: rtl8712: r8712_os_recvbuf_resource_free(): Change return type

Change return type of r8712_os_recvbuf_resource_free from int to void as
it always returns _SUCCESS and this return value is never stored,
checked or otherwise used. Remove return statement accordingly.

Signed-off-by: Nishka Dasgupta <nishkadg.linux@gmail.com>
Link: https://lore.kernel.org/r/20190802064212.30476-5-nishkadg.linux@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: rtl8712: r8712_init_recv_priv(): Change return type

Change return type of r8712_init_recv_priv from int to void as its
return value is never used. Remove return statements accordingly.

Signed-off-by: Nishka Dasgupta <nishkadg.linux@gmail.com>
Link: https://lore.kernel.org/r/20190802064212.30476-3-nishkadg.linux@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: rtl8712: _r8712_init_recv_priv(): Change return type

Change return type of _r8712_init_recv_priv as its return value is never
checked or used. Modify return statements accordingly.

Signed-off-by: Nishka Dasgupta <nishkadg.linux@gmail.com>
Link: https://lore.kernel.org/r/20190802064212.30476-2-nishkadg.linux@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: rtl8712: r8712_os_recv_resource_alloc(): Change return type

Change return type of function r8712_os_recv_resource_alloc from int to
void as its return value is never used.

Signed-off-by: Nishka Dasgupta <nishkadg.linux@gmail.com>
Link: https://lore.kernel.org/r/20190802064212.30476-1-nishkadg.linux@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: rtl8712: add SPDX identifiers

This satisfies a checkpatch warning and is the preferred
method for notating the license.

The SPDX identifier is a legally binding shorthand, which
can be used instead of the full boiler plate text.

Signed-off-by: Michael Straube <straube.linux@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: rtl8712: recv_linux: Remove unused function

Remove the function r8712_os_read_port() that is not used anywhere.

This was partially found by using a static code analysis program called cppcheck.

Signed-off-by: Rickard Strandqvist <rickard_strandqvist@spectrumdigital.se>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

staging: r8712u: Merging Realtek's latest (v2.6.6). Added Larry's copyright.

Larry Finger's copyright addendum has now been included in the
banners.
The files involved in this commit have had only their banners
changed; there have been no other mods.

Signed-off-by: Ali Bahar <ali@internetDog.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

staging: r8712u: Merging Realtek's latest (v2.6.6). Added copyright banners.

The only changes to these files have been the addition of only copyright
banners.

Signed-off-by: Ali Bahar <ali@internetDog.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

staging: rtl8712: fixed coding style issues

Fixed some style and format issues with headers.

Signed-off-by: Javier M. Mellid <jmunhoz@igalia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

staging: r8712u: Add the new driver to the mainline kernel

This code is for a completely new version of the Realtek 8192 USB devices
such as the D-Link DWA-130. The Realtek code, which was originally for
Linux, Windows XP and Windows CE, has been stripped of all code not needed
for Linux. In addition, only one additional configuration variable, which
enables AP mode, remains.

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Florian Schilhabel <florian.c.schilhabel@googlemail.com>
Tested-by: Frederic Leroy <fredo@starox.org>