On 27.06.2018 14:59, Sudip Mukherjee wrote:
Can you share a bit more details on the platform you are using, and what types
of test you are running.
It is a board based on "Intel(R) Atom(TM) CPU E3840 @ 1.91GHz".
The usb device in question is a bluetooth device:
Bus 001 Device 012: ID 8087:07dc Intel Corp.
<snip>
And the problem that we are seeing is with phone calls via bluetooth.
Does my test above trigger the case? (show "MATTU dmatest match!")
I have kept it for tonight, will see the results tomorrow morning.
And I am using that same device in the usb script to change "authrized".
No, your test did not trigger the error. :(
But, my last night's test (with an added debug to get some extra trace for
addresses) showed the same error of -
"Looking for event-dma", but looking at the ftrace, I could not see it getting
same address from dma_pool_zalloc().
Can you please have a look at the dmesg and ftrace at:
https://drive.google.com/open?id=1nMy_qVxOQzcZNYa9bw7az9WiS2MZzdKo
There is however freeing of the same dma address:
<...>-28448 [003] .... 492.025808: xhci_ring_free: ISOC f1ffb700: enq
0x000000002d31bcc0(0x000000002d31b000) deq 0x000000002d31b000(0x000000002d31b000)
segs 2 stream 0 free_trbs 305 bounce 17 cycle 0
<...>-28448 [003] .... 492.025818: xhci_ring_mem_detail: MATTU xhci segment free
seg->dma @ 0x000000002d31b000
<...>-28448 [003] .... 492.025823: xhci_ring_mem_detail: MATTU xhci segment free
seg->dma @ 0x000000002d31b000
<...>-28448 [003] .... 492.025826: xhci_ring_free: ISOC f1f9b380: enq
0x000000002d31b140(0x000000002d31b000) deq 0x000000002d31b000(0x000000002d31b000)
segs 2 stream 0 free_trbs 489 bounce 17 cycle 1
<...>-28448 [003] .... 492.025828: xhci_ring_mem_detail: MATTU xhci segment free
seg->dma @ 0x000000002d31b000
<...>-28448 [003] .... 492.025830: xhci_ring_mem_detail: MATTU xhci segment free
seg->dma @ 0x000000002d31b000
I'd guess it's still the same cause, maybe trace is not complete?
-Mathias
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