/*
 * Apple Onboard Audio driver core
 *
 * Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
 *
 * GPL v2, can be found in COPYING.
 */

#include <linux/init.h>
#include <linux/module.h>
#include <linux/list.h>
#include "../aoa.h"
#include "alsa.h"

MODULE_DESCRIPTION("Apple Onboard Audio Sound Driver");
MODULE_AUTHOR("Johannes Berg <johannes@sipsolutions.net>");
MODULE_LICENSE("GPL");

/* We allow only one fabric. This simplifies things,
 * and more don't really make that much sense */
static struct aoa_fabric *fabric;
static LIST_HEAD(codec_list);

static int attach_codec_to_fabric(struct aoa_codec *c)
{
	int err;

	if (!try_module_get(c->owner))
		return -EBUSY;
	/* found_codec has to be assigned */
	err = -ENOENT;
	if (fabric->found_codec)
		err = fabric->found_codec(c);
	if (err) {
		module_put(c->owner);
		printk(KERN_ERR "snd-aoa: fabric didn't like codec %s\n",
				c->name);
		return err;
	}
	c->fabric = fabric;

	err = 0;
	if (c->init)
		err = c->init(c);
	if (err) {
		printk(KERN_ERR "snd-aoa: codec %s didn't init\n", c->name);
		c->fabric = NULL;
		if (fabric->remove_codec)
			fabric->remove_codec(c);
		module_put(c->owner);
		return err;
	}
	if (fabric->attached_codec)
		fabric->attached_codec(c);
	return 0;
}

int aoa_codec_register(struct aoa_codec *codec)
{
	int err = 0;

	/* if there's a fabric already, we can tell if we
	 * will want to have this codec, so propagate error
	 * through. Otherwise, this will happen later... */
	if (fabric)
		err = attach_codec_to_fabric(codec);
	if (!err)
		list_add(&codec->list, &codec_list);
	return err;
}
EXPORT_SYMBOL_GPL(aoa_codec_register);

void aoa_codec_unregister(struct aoa_codec *codec)
{
	list_del(&codec->list);
	if (codec->fabric && codec->exit)
		codec->exit(codec);
	if (fabric && fabric->remove_codec)
		fabric->remove_codec(codec);
	codec->fabric = NULL;
	module_put(codec->owner);
}
EXPORT_SYMBOL_GPL(aoa_codec_unregister);

int aoa_fabric_register(struct aoa_fabric *new_fabric, struct device *dev)
{
	struct aoa_codec *c;
	int err;

	/* allow querying for presence of fabric
	 * (i.e. do this test first!) */
	if (new_fabric == fabric) {
		err = -EALREADY;
		goto attach;
	}
	if (fabric)
		return -EEXIST;
	if (!new_fabric)
		return -EINVAL;

	err = aoa_alsa_init(new_fabric->name, new_fabric->owner, dev);
	if (err)
		return err;

	fabric = new_fabric;

 attach:
	list_for_each_entry(c, &codec_list, list) {
		if (c->fabric != fabric)
			attach_codec_to_fabric(c);
	}
	return err;
}
EXPORT_SYMBOL_GPL(aoa_fabric_register);

void aoa_fabric_unregister(struct aoa_fabric *old_fabric)
{
	struct aoa_codec *c;

	if (fabric != old_fabric)
		return;

	list_for_each_entry(c, &codec_list, list) {
		if (c->fabric)
			aoa_fabric_unlink_codec(c);
	}

	aoa_alsa_cleanup();

	fabric = NULL;
}
EXPORT_SYMBOL_GPL(aoa_fabric_unregister);

void aoa_fabric_unlink_codec(struct aoa_codec *codec)
{
	if (!codec->fabric) {
		printk(KERN_ERR "snd-aoa: fabric unassigned "
				"in aoa_fabric_unlink_codec\n");
		dump_stack();
		return;
	}
	if (codec->exit)
		codec->exit(codec);
	if (codec->fabric->remove_codec)
		codec->fabric->remove_codec(codec);
	codec->fabric = NULL;
	module_put(codec->owner);
}
EXPORT_SYMBOL_GPL(aoa_fabric_unlink_codec);

static int __init aoa_init(void)
{
	return 0;
}

static void __exit aoa_exit(void)
{
	aoa_alsa_cleanup();
}

module_init(aoa_init);
module_exit(aoa_exit);
><input type='hidden' name='id' value='7a7b5df84b6b4e5d599c7289526eed96541a0654'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option 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>Johan Hovold &lt;johan@kernel.org&gt;</td><td class='right'>2017-01-30 11:26:38 +0100</td></tr>
<tr><th>committer</th><td>Jiri Kosina &lt;jkosina@suse.cz&gt;</td><td class='right'>2017-01-31 12:59:32 +0100</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/kernel/kmod.c?h=nds-private-remove&amp;id=7a7b5df84b6b4e5d599c7289526eed96541a0654'>7a7b5df84b6b4e5d599c7289526eed96541a0654</a> (<a href='/cgit.cgi/linux/net-next.git/patch/kernel/kmod.c?id=7a7b5df84b6b4e5d599c7289526eed96541a0654'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?h=nds-private-remove&amp;id=7a7b5df84b6b4e5d599c7289526eed96541a0654'>cf7514c7ddf4410fe37ca9099a2785e1cf08fa7d</a> /<a href='/cgit.cgi/linux/net-next.git/tree/kernel/kmod.c?h=nds-private-remove&amp;id=7a7b5df84b6b4e5d599c7289526eed96541a0654'>kernel/kmod.c</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/kernel/kmod.c?h=nds-private-remove&amp;id=877a021e08ccb6434718c0cc781fdf943c884cc0'>877a021e08ccb6434718c0cc781fdf943c884cc0</a> (<a href='/cgit.cgi/linux/net-next.git/diff/kernel/kmod.c?h=nds-private-remove&amp;id=7a7b5df84b6b4e5d599c7289526eed96541a0654&amp;id2=877a021e08ccb6434718c0cc781fdf943c884cc0'>diff</a>)</td></tr></table>
<div class='commit-subject'>HID: cp2112: fix sleep-while-atomic</div><div class='commit-msg'>A recent commit fixing DMA-buffers on stack added a shared transfer
buffer protected by a spinlock. This is broken as the USB HID request
callbacks can sleep. Fix this up by replacing the spinlock with a mutex.

Fixes: 1ffb3c40ffb5 ("HID: cp2112: make transfer buffers DMA capable")
Cc: stable &lt;stable@vger.kernel.org&gt;	# 4.9
Signed-off-by: Johan Hovold &lt;johan@kernel.org&gt;
Reviewed-by: Benjamin Tissoires &lt;benjamin.tissoires@redhat.com&gt;
Signed-off-by: Jiri Kosina &lt;jkosina@suse.cz&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove&amp;id=7a7b5df84b6b4e5d599c7289526eed96541a0654'>Diffstat</a> (limited to 'kernel/kmod.c')</div><table summary='diffstat' class='diffstat'>