/*
 * ALSA PCM interface for ST SPEAr Processors
 *
 * sound/soc/spear/spear_pcm.c
 *
 * Copyright (C) 2012 ST Microelectronics
 * Rajeev Kumar<rajeevkumar.linux@gmail.com>
 *
 * This file is licensed under the terms of the GNU General Public
 * License version 2. This program is licensed "as is" without any
 * warranty of any kind, whether express or implied.
 */

#include <linux/module.h>
#include <linux/dmaengine.h>
#include <linux/platform_device.h>
#include <sound/dmaengine_pcm.h>
#include <sound/pcm.h>
#include <sound/soc.h>
#include <sound/spear_dma.h>
#include "spear_pcm.h"

static const struct snd_pcm_hardware spear_pcm_hardware = {
	.info = (SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER |
		 SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID |
		 SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME),
	.buffer_bytes_max = 16 * 1024, /* max buffer size */
	.period_bytes_min = 2 * 1024, /* 1 msec data minimum period size */
	.period_bytes_max = 2 * 1024, /* maximum period size */
	.periods_min = 1, /* min # periods */
	.periods_max = 8, /* max # of periods */
	.fifo_size = 0, /* fifo size in bytes */
};

static const struct snd_dmaengine_pcm_config spear_dmaengine_pcm_config = {
	.pcm_hardware = &spear_pcm_hardware,
	.prealloc_buffer_size = 16 * 1024,
};

int devm_spear_pcm_platform_register(struct device *dev,
			struct snd_dmaengine_pcm_config *config,
			bool (*filter)(struct dma_chan *chan, void *slave))
{
	*config = spear_dmaengine_pcm_config;
	config->compat_filter_fn = filter;

	return devm_snd_dmaengine_pcm_register(dev, config,
		SND_DMAENGINE_PCM_FLAG_NO_DT |
		SND_DMAENGINE_PCM_FLAG_COMPAT);
}
EXPORT_SYMBOL_GPL(devm_spear_pcm_platform_register);

MODULE_AUTHOR("Rajeev Kumar <rajeevkumar.linux@gmail.com>");
MODULE_DESCRIPTION("SPEAr PCM DMA module");
MODULE_LICENSE("GPL");
linux/net-next.git/tree/include/uapi/drm/drm_sarea.h?id=217e6fa24ce28ec87fca8da93c9016cb78028612'>tree</a><a href='/cgit.cgi/linux/net-next.git/commit/include/uapi/drm/drm_sarea.h?id=217e6fa24ce28ec87fca8da93c9016cb78028612'>commit</a><a href='/cgit.cgi/linux/net-next.git/diff/include/uapi/drm/drm_sarea.h?id=217e6fa24ce28ec87fca8da93c9016cb78028612'>diff</a></td><td class='form'><form class='right' method='get' action='/cgit.cgi/linux/net-next.git/log/include/uapi/drm/drm_sarea.h'>
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/log/?id=217e6fa24ce28ec87fca8da93c9016cb78028612&amp;showmsg=1'>root</a>/<a href='/cgit.cgi/linux/net-next.git/log/include?id=217e6fa24ce28ec87fca8da93c9016cb78028612&amp;showmsg=1'>include</a>/<a href='/cgit.cgi/linux/net-next.git/log/include/uapi?id=217e6fa24ce28ec87fca8da93c9016cb78028612&amp;showmsg=1'>uapi</a>/<a href='/cgit.cgi/linux/net-next.git/log/include/uapi/drm?id=217e6fa24ce28ec87fca8da93c9016cb78028612&amp;showmsg=1'>drm</a>/<a href='/cgit.cgi/linux/net-next.git/log/include/uapi/drm/drm_sarea.h?id=217e6fa24ce28ec87fca8da93c9016cb78028612&amp;showmsg=1'>drm_sarea.h</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/cgit.cgi/linux/net-next.git/log/include/uapi/drm/drm_sarea.h?id=217e6fa24ce28ec87fca8da93c9016cb78028612'>Collapse</a>)</th><th class='left'>Author</th><th class='left'>Files</th><th class='left'>Lines</th></tr>
/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>Bjorn Helgaas &lt;bhelgaas@google.com&gt;</td><td class='right'>2017-01-27 15:00:45 -0600</td></tr>
<tr><th>committer</th><td>Bjorn Helgaas &lt;bhelgaas@google.com&gt;</td><td class='right'>2017-01-27 15:00:45 -0600</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/net/caif/cfpkt.h?id=030305d69fc6963c16003f50d7e8d74b02d0a143'>030305d69fc6963c16003f50d7e8d74b02d0a143</a> (<a href='/cgit.cgi/linux/net-next.git/patch/include/net/caif/cfpkt.h?id=030305d69fc6963c16003f50d7e8d74b02d0a143'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=030305d69fc6963c16003f50d7e8d74b02d0a143'>363a4e34d199178769b7e7eeb26ea2620a55847b</a> /<a href='/cgit.cgi/linux/net-next.git/tree/include/net/caif/cfpkt.h?id=030305d69fc6963c16003f50d7e8d74b02d0a143'>include/net/caif/cfpkt.h</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/net/caif/cfpkt.h?id=4d191b1b63c209e37bf27938ef365244d3c41084'>4d191b1b63c209e37bf27938ef365244d3c41084</a> (<a href='/cgit.cgi/linux/net-next.git/diff/include/net/caif/cfpkt.h?id=030305d69fc6963c16003f50d7e8d74b02d0a143&amp;id2=4d191b1b63c209e37bf27938ef365244d3c41084'>diff</a>)</td></tr></table>
<div class='commit-subject'>PCI/ASPM: Handle PCI-to-PCIe bridges as roots of PCIe hierarchies</div><div class='commit-msg'>In a struct pcie_link_state, link-&gt;root points to the pcie_link_state of
the root of the PCIe hierarchy.  For the topmost link, this points to
itself (link-&gt;root = link).  For others, we copy the pointer from the
parent (link-&gt;root = link-&gt;parent-&gt;root).

Previously we recognized that Root Ports originated PCIe hierarchies, but
we treated PCI/PCI-X to PCIe Bridges as being in the middle of the
hierarchy, and when we tried to copy the pointer from link-&gt;parent-&gt;root,
there was no parent, and we dereferenced a NULL pointer:

  BUG: unable to handle kernel NULL pointer dereference at 0000000000000090
  IP: [&lt;ffffffff9e424350&gt;] pcie_aspm_init_link_state+0x170/0x820

Recognize that PCI/PCI-X to PCIe Bridges originate PCIe hierarchies just
like Root Ports do, so link-&gt;root for these devices should also point to
itself.

Fixes: 51ebfc92b72b ("PCI: Enumerate switches below PCI-to-PCIe bridges")
Link: https://bugzilla.kernel.org/show_bug.cgi?id=193411
Link: https://bugzilla.opensuse.org/show_bug.cgi?id=1022181
Tested-by: lists@ssl-mail.com
Tested-by: Jayachandran C. &lt;jnair@caviumnetworks.com&gt;
Signed-off-by: Bjorn Helgaas &lt;bhelgaas@google.com&gt;
CC: stable@vger.kernel.org	# v4.2+</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=030305d69fc6963c16003f50d7e8d74b02d0a143'>Diffstat</a> (limited to 'include/net/caif/cfpkt.h')</div><table summary='diffstat' class='diffstat'>