/******************************************************************************

    AudioScience HPI driver
    Copyright (C) 1997-2014  AudioScience Inc. <support@audioscience.com>

    This program is free software; you can redistribute it and/or modify
    it under the terms of version 2 of the GNU General Public License as
    published by the Free Software Foundation;

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

 Hardware Programming Interface (HPI) Utility functions.

 (C) Copyright AudioScience Inc. 2007
*******************************************************************************/

#include "hpi_internal.h"
#include "hpimsginit.h"

/* The actual message size for each object type */
static u16 msg_size[HPI_OBJ_MAXINDEX + 1] = HPI_MESSAGE_SIZE_BY_OBJECT;
/* The actual response size for each object type */
static u16 res_size[HPI_OBJ_MAXINDEX + 1] = HPI_RESPONSE_SIZE_BY_OBJECT;
/* Flag to enable alternate message type for SSX2 bypass. */
static u16 gwSSX2_bypass;

/** \internal
  * initialize the HPI message structure
  */
static void hpi_init_message(struct hpi_message *phm, u16 object,
	u16 function)
{
	u16 size;

	if ((object > 0) && (object <= HPI_OBJ_MAXINDEX))
		size = msg_size[object];
	else
		size = sizeof(*phm);

	memset(phm, 0, size);
	phm->size = size;

	if (gwSSX2_bypass)
		phm->type = HPI_TYPE_SSX2BYPASS_MESSAGE;
	else
		phm->type = HPI_TYPE_REQUEST;
	phm->object = object;
	phm->function = function;
	phm->version = 0;
	phm->adapter_index = HPI_ADAPTER_INDEX_INVALID;
	/* Expect actual adapter index to be set by caller */
}

/** \internal
  * initialize the HPI response structure
  */
void hpi_init_response(struct hpi_response *phr, u16 object, u16 function,
	u16 error)
{
	u16 size;

	if ((object > 0) && (object <= HPI_OBJ_MAXINDEX))
		size = res_size[object];
	else
		size = sizeof(*phr);

	memset(phr, 0, sizeof(*phr));
	phr->size = size;
	phr->type = HPI_TYPE_RESPONSE;
	phr->object = object;
	phr->function = function;
	phr->error = error;
	phr->specific_error = 0;
	phr->version = 0;
}

void hpi_init_message_response(struct hpi_message *phm,
	struct hpi_response *phr, u16 object, u16 function)
{
	hpi_init_message(phm, object, function);
	/* default error return if the response is
	   not filled in by the callee */
	hpi_init_response(phr, object, function,
		HPI_ERROR_PROCESSING_MESSAGE);
}

static void hpi_init_messageV1(struct hpi_message_header *phm, u16 size,
	u16 object, u16 function)
{
	memset(phm, 0, size);
	if ((object > 0) && (object <= HPI_OBJ_MAXINDEX)) {
		phm->size = size;
		phm->type = HPI_TYPE_REQUEST;
		phm->object = object;
		phm->function = function;
		phm->version = 1;
		/* Expect adapter index to be set by caller */
	}
}

void hpi_init_responseV1(struct hpi_response_header *phr, u16 size,
	u16 object, u16 function)
{
	(void)object;
	(void)function;
	memset(phr, 0, size);
	phr->size = size;
	phr->version = 1;
	phr->type = HPI_TYPE_RESPONSE;
	phr->error = HPI_ERROR_PROCESSING_MESSAGE;
}

void hpi_init_message_responseV1(struct hpi_message_header *phm, u16 msg_size,
	struct hpi_response_header *phr, u16 res_size, u16 object,
	u16 function)
{
	hpi_init_messageV1(phm, msg_size, object, function);
	hpi_init_responseV1(phr, res_size, object, function);
}
n value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Tejun Heo &lt;tj@kernel.org&gt;</td><td class='right'>2017-01-26 16:47:28 -0500</td></tr>
<tr><th>committer</th><td>Tejun Heo &lt;tj@kernel.org&gt;</td><td class='right'>2017-01-26 16:47:28 -0500</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/net/transp_v6.h?id=07cd12945551b63ecb1a349d50a6d69d1d6feb4a'>07cd12945551b63ecb1a349d50a6d69d1d6feb4a</a> (<a href='/cgit.cgi/linux/net-next.git/patch/include/net/transp_v6.h?id=07cd12945551b63ecb1a349d50a6d69d1d6feb4a'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=07cd12945551b63ecb1a349d50a6d69d1d6feb4a'>75f65eba7eac9277971082a2d5a4cf1370562c0c</a> /<a href='/cgit.cgi/linux/net-next.git/tree/include/net/transp_v6.h?id=07cd12945551b63ecb1a349d50a6d69d1d6feb4a'>include/net/transp_v6.h</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/net/transp_v6.h?id=7ce7d89f48834cefece7804d38fc5d85382edf77'>7ce7d89f48834cefece7804d38fc5d85382edf77</a> (<a href='/cgit.cgi/linux/net-next.git/diff/include/net/transp_v6.h?id=07cd12945551b63ecb1a349d50a6d69d1d6feb4a&amp;id2=7ce7d89f48834cefece7804d38fc5d85382edf77'>diff</a>)</td></tr></table>
<div class='commit-subject'>cgroup: don't online subsystems before cgroup_name/path() are operational</div><div class='commit-msg'>While refactoring cgroup creation, a5bca2152036 ("cgroup: factor out
cgroup_create() out of cgroup_mkdir()") incorrectly onlined subsystems
before the new cgroup is associated with it kernfs_node.  This is fine
for cgroup proper but cgroup_name/path() depend on the associated
kernfs_node and if a subsystem makes the new cgroup_subsys_state
visible, which they're allowed to after onlining, it can lead to NULL
dereference.

The current code performs cgroup creation and subsystem onlining in
cgroup_create() and cgroup_mkdir() makes the cgroup and subsystems
visible afterwards.  There's no reason to online the subsystems early
and we can simply drop cgroup_apply_control_enable() call from
cgroup_create() so that the subsystems are onlined and made visible at
the same time.

Signed-off-by: Tejun Heo &lt;tj@kernel.org&gt;
Reported-by: Konstantin Khlebnikov &lt;khlebnikov@yandex-team.ru&gt;
Fixes: a5bca2152036 ("cgroup: factor out cgroup_create() out of cgroup_mkdir()") 
Cc: stable@vger.kernel.org # v4.6+
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=07cd12945551b63ecb1a349d50a6d69d1d6feb4a'>Diffstat</a> (limited to 'include/net/transp_v6.h')</div><table summary='diffstat' class='diffstat'>