#undef TRACE_SYSTEM
#define TRACE_SYSTEM hda

#if !defined(__HDAC_TRACE_H) || defined(TRACE_HEADER_MULTI_READ)
#define __HDAC_TRACE_H

#include <linux/tracepoint.h>
#include <linux/device.h>
#include <sound/hdaudio.h>

#ifndef HDAC_MSG_MAX
#define HDAC_MSG_MAX	500
#endif

struct hdac_bus;
struct hdac_codec;

TRACE_EVENT(hda_send_cmd,
	TP_PROTO(struct hdac_bus *bus, unsigned int cmd),
	TP_ARGS(bus, cmd),
	TP_STRUCT__entry(__dynamic_array(char, msg, HDAC_MSG_MAX)),
	TP_fast_assign(
		snprintf(__get_str(msg), HDAC_MSG_MAX,
			 "[%s:%d] val=0x%08x",
			 dev_name((bus)->dev), (cmd) >> 28, cmd);
	),
	TP_printk("%s", __get_str(msg))
);

TRACE_EVENT(hda_get_response,
	TP_PROTO(struct hdac_bus *bus, unsigned int addr, unsigned int res),
	TP_ARGS(bus, addr, res),
	TP_STRUCT__entry(__dynamic_array(char, msg, HDAC_MSG_MAX)),
	TP_fast_assign(
		snprintf(__get_str(msg), HDAC_MSG_MAX,
			 "[%s:%d] val=0x%08x",
			 dev_name((bus)->dev), addr, res);
	),
	TP_printk("%s", __get_str(msg))
);

TRACE_EVENT(hda_unsol_event,
	TP_PROTO(struct hdac_bus *bus, u32 res, u32 res_ex),
	TP_ARGS(bus, res, res_ex),
	TP_STRUCT__entry(__dynamic_array(char, msg, HDAC_MSG_MAX)),
	TP_fast_assign(
		snprintf(__get_str(msg), HDAC_MSG_MAX,
			 "[%s:%d] res=0x%08x, res_ex=0x%08x",
			 dev_name((bus)->dev), res_ex & 0x0f, res, res_ex);
	),
	TP_printk("%s", __get_str(msg))
);

DECLARE_EVENT_CLASS(hdac_stream,
	TP_PROTO(struct hdac_bus *bus, struct hdac_stream *azx_dev),

	TP_ARGS(bus, azx_dev),

	TP_STRUCT__entry(
		__field(unsigned char, stream_tag)
	),

	TP_fast_assign(
		__entry->stream_tag = (azx_dev)->stream_tag;
	),

	TP_printk("stream_tag: %d", __entry->stream_tag)
);

DEFINE_EVENT(hdac_stream, snd_hdac_stream_start,
	TP_PROTO(struct hdac_bus *bus, struct hdac_stream *azx_dev),
	TP_ARGS(bus, azx_dev)
);

DEFINE_EVENT(hdac_stream, snd_hdac_stream_stop,
	TP_PROTO(struct hdac_bus *bus, struct hdac_stream *azx_dev),
	TP_ARGS(bus, azx_dev)
);

#endif /* __HDAC_TRACE_H */

/* This part must be outside protection */
#undef TRACE_INCLUDE_PATH
#define TRACE_INCLUDE_PATH .

#undef TRACE_INCLUDE_FILE
#define TRACE_INCLUDE_FILE trace

#include <trace/define_trace.h>
a9c00980552fe508c'>commit</a><a href='/cgit.cgi/linux/net-next.git/diff/sound/pci/mixart/mixart.c?h=nds-private-remove&amp;id=433e19cf33d34bb6751c874a9c00980552fe508c'>diff</a></td><td class='form'><form class='right' method='get' action='/cgit.cgi/linux/net-next.git/log/sound/pci/mixart/mixart.c'>
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<option value='grep'>log msg</option>
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?h=nds-private-remove&amp;id=433e19cf33d34bb6751c874a9c00980552fe508c'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/sound?h=nds-private-remove&amp;id=433e19cf33d34bb6751c874a9c00980552fe508c'>sound</a>/<a href='/cgit.cgi/linux/net-next.git/commit/sound/pci?h=nds-private-remove&amp;id=433e19cf33d34bb6751c874a9c00980552fe508c'>pci</a>/<a href='/cgit.cgi/linux/net-next.git/commit/sound/pci/mixart?h=nds-private-remove&amp;id=433e19cf33d34bb6751c874a9c00980552fe508c'>mixart</a>/<a href='/cgit.cgi/linux/net-next.git/commit/sound/pci/mixart/mixart.c?h=nds-private-remove&amp;id=433e19cf33d34bb6751c874a9c00980552fe508c'>mixart.c</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='h' value='nds-private-remove'/><input type='hidden' name='id' value='433e19cf33d34bb6751c874a9c00980552fe508c'/><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>Dexuan Cui &lt;decui@microsoft.com&gt;</td><td class='right'>2017-01-28 11:46:02 -0700</td></tr>
<tr><th>committer</th><td>Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;</td><td class='right'>2017-01-31 10:59:48 +0100</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/sound/pci/mixart/mixart.c?h=nds-private-remove&amp;id=433e19cf33d34bb6751c874a9c00980552fe508c'>433e19cf33d34bb6751c874a9c00980552fe508c</a> (<a href='/cgit.cgi/linux/net-next.git/patch/sound/pci/mixart/mixart.c?id=433e19cf33d34bb6751c874a9c00980552fe508c'>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=433e19cf33d34bb6751c874a9c00980552fe508c'>ce6547ef2987fbb289fa28f03536328a42781651</a> /<a href='/cgit.cgi/linux/net-next.git/tree/sound/pci/mixart/mixart.c?h=nds-private-remove&amp;id=433e19cf33d34bb6751c874a9c00980552fe508c'>sound/pci/mixart/mixart.c</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/sound/pci/mixart/mixart.c?h=nds-private-remove&amp;id=191e885a2e130e639bb0c8ee350d7047294f2ce6'>191e885a2e130e639bb0c8ee350d7047294f2ce6</a> (<a href='/cgit.cgi/linux/net-next.git/diff/sound/pci/mixart/mixart.c?h=nds-private-remove&amp;id=433e19cf33d34bb6751c874a9c00980552fe508c&amp;id2=191e885a2e130e639bb0c8ee350d7047294f2ce6'>diff</a>)</td></tr></table>
<div class='commit-subject'>Drivers: hv: vmbus: finally fix hv_need_to_signal_on_read()</div><div class='commit-msg'>Commit a389fcfd2cb5 ("Drivers: hv: vmbus: Fix signaling logic in
hv_need_to_signal_on_read()")
added the proper mb(), but removed the test "prev_write_sz &lt; pending_sz"
when making the signal decision.

As a result, the guest can signal the host unnecessarily,
and then the host can throttle the guest because the host
thinks the guest is buggy or malicious; finally the user
running stress test can perceive intermittent freeze of
the guest.

This patch brings back the test, and properly handles the
in-place consumption APIs used by NetVSC (see get_next_pkt_raw(),
put_pkt_raw() and commit_rd_index()).

Fixes: a389fcfd2cb5 ("Drivers: hv: vmbus: Fix signaling logic in
hv_need_to_signal_on_read()")

Signed-off-by: Dexuan Cui &lt;decui@microsoft.com&gt;
Reported-by: Rolf Neugebauer &lt;rolf.neugebauer@docker.com&gt;
Tested-by: Rolf Neugebauer &lt;rolf.neugebauer@docker.com&gt;
Cc: "K. Y. Srinivasan" &lt;kys@microsoft.com&gt;
Cc: Haiyang Zhang &lt;haiyangz@microsoft.com&gt;
Cc: Stephen Hemminger &lt;sthemmin@microsoft.com&gt;
Cc: &lt;stable@vger.kernel.org&gt;
Signed-off-by: K. Y. Srinivasan &lt;kys@microsoft.com&gt;
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove&amp;id=433e19cf33d34bb6751c874a9c00980552fe508c'>Diffstat</a> (limited to 'sound/pci/mixart/mixart.c')</div><table summary='diffstat' class='diffstat'>