[
    {
        "EventCode": "0x8",
        "Counter": "0,1,2,3",
        "UMask": "0x1",
        "EventName": "DTLB_LOAD_MISSES.ANY",
        "SampleAfterValue": "200000",
        "BriefDescription": "DTLB load misses"
    },
    {
        "EventCode": "0x8",
        "Counter": "0,1,2,3",
        "UMask": "0x80",
        "EventName": "DTLB_LOAD_MISSES.LARGE_WALK_COMPLETED",
        "SampleAfterValue": "200000",
        "BriefDescription": "DTLB load miss large page walks"
    },
    {
        "EventCode": "0x8",
        "Counter": "0,1,2,3",
        "UMask": "0x20",
        "EventName": "DTLB_LOAD_MISSES.PDE_MISS",
        "SampleAfterValue": "200000",
        "BriefDescription": "DTLB load miss caused by low part of address"
    },
    {
        "EventCode": "0x8",
        "Counter": "0,1,2,3",
        "UMask": "0x10",
        "EventName": "DTLB_LOAD_MISSES.STLB_HIT",
        "SampleAfterValue": "2000000",
        "BriefDescription": "DTLB second level hit"
    },
    {
        "EventCode": "0x8",
        "Counter": "0,1,2,3",
        "UMask": "0x2",
        "EventName": "DTLB_LOAD_MISSES.WALK_COMPLETED",
        "SampleAfterValue": "200000",
        "BriefDescription": "DTLB load miss page walks complete"
    },
    {
        "EventCode": "0x8",
        "Counter": "0,1,2,3",
        "UMask": "0x4",
        "EventName": "DTLB_LOAD_MISSES.WALK_CYCLES",
        "SampleAfterValue": "200000",
        "BriefDescription": "DTLB load miss page walk cycles"
    },
    {
        "EventCode": "0x49",
        "Counter": "0,1,2,3",
        "UMask": "0x1",
        "EventName": "DTLB_MISSES.ANY",
        "SampleAfterValue": "200000",
        "BriefDescription": "DTLB misses"
    },
    {
        "EventCode": "0x49",
        "Counter": "0,1,2,3",
        "UMask": "0x80",
        "EventName": "DTLB_MISSES.LARGE_WALK_COMPLETED",
        "SampleAfterValue": "200000",
        "BriefDescription": "DTLB miss large page walks"
    },
    {
        "EventCode": "0x49",
        "Counter": "0,1,2,3",
        "UMask": "0x20",
        "EventName": "DTLB_MISSES.PDE_MISS",
        "SampleAfterValue": "200000",
        "BriefDescription": "DTLB misses caused by low part of address. Count also includes 2M page references because 2M pages do not use the PDE."
    },
    {
        "EventCode": "0x49",
        "Counter": "0,1,2,3",
        "UMask": "0x10",
        "EventName": "DTLB_MISSES.STLB_HIT",
        "SampleAfterValue": "200000",
        "BriefDescription": "DTLB first level misses but second level hit"
    },
    {
        "EventCode": "0x49",
        "Counter": "0,1,2,3",
        "UMask": "0x2",
        "EventName": "DTLB_MISSES.WALK_COMPLETED",
        "SampleAfterValue": "200000",
        "BriefDescription": "DTLB miss page walks"
    },
    {
        "EventCode": "0x49",
        "Counter": "0,1,2,3",
        "UMask": "0x4",
        "EventName": "DTLB_MISSES.WALK_CYCLES",
        "SampleAfterValue": "2000000",
        "BriefDescription": "DTLB miss page walk cycles"
    },
    {
        "EventCode": "0x4F",
        "Counter": "0,1,2,3",
        "UMask": "0x10",
        "EventName": "EPT.WALK_CYCLES",
        "SampleAfterValue": "2000000",
        "BriefDescription": "Extended Page Table walk cycles"
    },
    {
        "EventCode": "0xAE",
        "Counter": "0,1,2,3",
        "UMask": "0x1",
        "EventName": "ITLB_FLUSH",
        "SampleAfterValue": "2000000",
        "BriefDescription": "ITLB flushes"
    },
    {
        "PEBS": "1",
        "EventCode": "0xC8",
        "Counter": "0,1,2,3",
        "UMask": "0x20",
        "EventName": "ITLB_MISS_RETIRED",
        "SampleAfterValue": "200000",
        "BriefDescription": "Retired instructions that missed the ITLB (Precise Event)"
    },
    {
        "EventCode": "0x85",
        "Counter": "0,1,2,3",
        "UMask": "0x1",
        "EventName": "ITLB_MISSES.ANY",
        "SampleAfterValue": "200000",
        "BriefDescription": "ITLB miss"
    },
    {
        "EventCode": "0x85",
        "Counter": "0,1,2,3",
        "UMask": "0x80",
        "EventName": "ITLB_MISSES.LARGE_WALK_COMPLETED",
        "SampleAfterValue": "200000",
        "BriefDescription": "ITLB miss large page walks"
    },
    {
        "EventCode": "0x85",
        "Counter": "0,1,2,3",
        "UMask": "0x2",
        "EventName": "ITLB_MISSES.WALK_COMPLETED",
        "SampleAfterValue": "200000",
        "BriefDescription": "ITLB miss page walks"
    },
    {
        "EventCode": "0x85",
        "Counter": "0,1,2,3",
        "UMask": "0x4",
        "EventName": "ITLB_MISSES.WALK_CYCLES",
        "SampleAfterValue": "2000000",
        "BriefDescription": "ITLB miss page walk cycles"
    },
    {
        "PEBS": "1",
        "EventCode": "0xCB",
        "Counter": "0,1,2,3",
        "UMask": "0x80",
        "EventName": "MEM_LOAD_RETIRED.DTLB_MISS",
        "SampleAfterValue": "200000",
        "BriefDescription": "Retired loads that miss the DTLB (Precise Event)"
    },
    {
        "PEBS": "1",
        "EventCode": "0xC",
        "Counter": "0,1,2,3",
        "UMask": "0x1",
        "EventName": "MEM_STORE_RETIRED.DTLB_MISS",
        "SampleAfterValue": "200000",
        "BriefDescription": "Retired stores that miss the DTLB (Precise Event)"
    }
]></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=b17c1bba9cec1727451b906d9a0c209774624873'>f0a0f51d405c884e23f695695858d85f6260fec0</a> /<a href='/cgit.cgi/linux/net-next.git/tree/drivers/usb/core/Makefile?id=b17c1bba9cec1727451b906d9a0c209774624873'>drivers/usb/core/Makefile</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/core/Makefile?id=9579c4dc21292f375715d7acca439dac9855b3e9'>9579c4dc21292f375715d7acca439dac9855b3e9</a> (<a href='/cgit.cgi/linux/net-next.git/diff/drivers/usb/core/Makefile?id=b17c1bba9cec1727451b906d9a0c209774624873&amp;id2=9579c4dc21292f375715d7acca439dac9855b3e9'>diff</a>)</td></tr></table>
<div class='commit-subject'>staging: greybus: timesync: validate platform state callback</div><div class='commit-msg'>When tearingdown timesync, and not in arche platform, the state platform
callback is not initialized. That will trigger the following NULL
dereferencing.
CallTrace:

 ? gb_timesync_platform_unlock_bus+0x11/0x20 [greybus]
 gb_timesync_teardown+0x85/0xc0 [greybus]
 gb_timesync_svc_remove+0xab/0x190 [greybus]
 gb_svc_del+0x29/0x110 [greybus]
 gb_hd_del+0x14/0x20 [greybus]
 ap_disconnect+0x24/0x60 [gb_es2]
 usb_unbind_interface+0x7a/0x2c0
 __device_release_driver+0x96/0x150
 device_release_driver+0x1e/0x30
 bus_remove_device+0xe7/0x130
 device_del+0x116/0x230
 usb_disable_device+0x97/0x1f0
 usb_disconnect+0x80/0x260
 hub_event+0x5ca/0x10e0
 process_one_work+0x126/0x3b0
 worker_thread+0x55/0x4c0
 ? process_one_work+0x3b0/0x3b0
 kthread+0xc4/0xe0
 ? kthread_park+0xb0/0xb0
 ret_from_fork+0x22/0x30

So, fix that by adding checks before use the callback.

Fixes: 970dc85bd95d ("greybus: timesync: Add timesync core driver")
Cc: &lt;stable@vger.kernel.org&gt; # 4.9.x
Signed-off-by: Rui Miguel Silva &lt;rmfrfs@gmail.com&gt;
Reviewed-by: Viresh Kumar &lt;viresh.kumar@linaro.org&gt;
Reviewed-by: Johan Hovold &lt;johan@kernel.org&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/?id=b17c1bba9cec1727451b906d9a0c209774624873'>Diffstat</a> (limited to 'drivers/usb/core/Makefile')</div><table summary='diffstat' class='diffstat'>