DWC OTG TX path optimisation for 11-current

[Andreas Schwarz]

On 31.07.15, Hans Petter Selasky wrote:

> The attached patch will add some more debug prints so that I know what 
> is going on in the problematic function. You'll need to C&P me the 
> resulting console prints.

I've applied the patch to r286117 and started to build the world in a 
loop until the problem occur. See the output below. After the problem 
was there (last lines), no further debug output was generated by your 
patch.

[...]
ue0: link state changed to UP
uhid0: <Chicony USB Keyboard, class 0/0, rev 2.00/1.65, addr 4> on usbus0
MAX=8 CAME=1 STS=0x00000000 ACTIVE=0x00000002
MAX=9 CAME=4 STS=0x00000000 ACTIVE=0x00000002
MAX=10 CAME=1 STS=0x00000000 ACTIVE=0x00000002
MAX=11 CAME=1 STS=0x00000000 ACTIVE=0x00000002
MAX=12 CAME=4 STS=0x00000000 ACTIVE=0x00000001
MAX=13 CAME=1 STS=0x00000000 ACTIVE=0x00000001
MAX=14 CAME=1 STS=0x00000000 ACTIVE=0x00000001
MAX=15 CAME=4 STS=0x00000000 ACTIVE=0x00000002
MAX=16 CAME=1 STS=0x00000000 ACTIVE=0x00000002
MAX=17 CAME=1 STS=0x00000000 ACTIVE=0x00000002
MAX=18 CAME=4 STS=0x00000000 ACTIVE=0x00000001
MAX=19 CAME=1 STS=0x00000000 ACTIVE=0x00000001
MAX=20 CAME=1 STS=0x00000000 ACTIVE=0x00000001
MAX=21 CAME=4 STS=0x00000000 ACTIVE=0x00000002
MAX=22 CAME=1 STS=0x00000000 ACTIVE=0x00000002
MAX=23 CAME=1 STS=0x00000000 ACTIVE=0x00000002
MAX=24 CAME=4 STS=0x00000000 ACTIVE=0x00000001
MAX=25 CAME=1 STS=0x00000000 ACTIVE=0x00000001
MAX=26 CAME=1 STS=0x00000000 ACTIVE=0x00000001
MAX=27 CAME=4 STS=0x00000000 ACTIVE=0x00000002
MAX=28 CAME=1 STS=0x00000000 ACTIVE=0x00000002
MAX=29 CAME=1 STS=0x00000000 ACTIVE=0x00000002
MAX=30 CAME=4 STS=0x00000000 ACTIVE=0x00000001
MAX=31 CAME=1 STS=0x00000000 ACTIVE=0x00000001
MAX=32 CAME=1 STS=0x00000000 ACTIVE=0x00000001
MAX=33 CAME=4 STS=0x00000000 ACTIVE=0x00000002
MAX=34 CAME=1 STS=0x00000000 ACTIVE=0x00000002
MAX=35 CAME=1 STS=0x00000000 ACTIVE=0x00000002
MAX=36 CAME=4 STS=0x00000000 ACTIVE=0x00000001
MAX=37 CAME=1 STS=0x00000000 ACTIVE=0x00000001
MAX=38 CAME=1 STS=0x00000000 ACTIVE=0x00000001
MAX=39 CAME=4 STS=0x00000000 ACTIVE=0x00000002
MAX=40 CAME=1 STS=0x00000000 ACTIVE=0x00000002
MAX=41 CAME=1 STS=0x00000000 ACTIVE=0x00000002
MAX=42 CAME=4 STS=0x00000000 ACTIVE=0x00000001
MAX=43 CAME=1 STS=0x00000000 ACTIVE=0x00000001
MAX=44 CAME=1 STS=0x00000000 ACTIVE=0x00000001
MAX=45 CAME=4 STS=0x00000000 ACTIVE=0x00000002
MAX=46 CAME=1 STS=0x00000000 ACTIVE=0x00000002
MAX=47 CAME=1 STS=0x00000000 ACTIVE=0x00000002
MAX=48 CAME=4 STS=0x00000000 ACTIVE=0x00000001
MAX=49 CAME=1 STS=0x00000000 ACTIVE=0x00000001
MAX=50 CAME=1 STS=0x00000000 ACTIVE=0x00000001
MAX=51 CAME=4 STS=0x00000000 ACTIVE=0x00000002
MAX=52 CAME=1 STS=0x00000000 ACTIVE=0x00000002
MAX=53 CAME=1 STS=0x00000000 ACTIVE=0x00000002
MAX=54 CAME=4 STS=0x00000000 ACTIVE=0x00000001
MAX=55 CAME=1 STS=0x00000000 ACTIVE=0x00000001
MAX=56 CAME=1 STS=0x00000000 ACTIVE=0x00000001
MAX=57 CAME=4 STS=0x00000000 ACTIVE=0x00000002
MAX=58 CAME=1 STS=0x00000000 ACTIVE=0x00000002
MAX=59 CAME=1 STS=0x00000000 ACTIVE=0x00000002
MAX=60 CAME=4 STS=0x00000000 ACTIVE=0x00000001
MAX=61 CAME=1 STS=0x00000000 ACTIVE=0x00000001
MAX=62 CAME=1 STS=0x00000000 ACTIVE=0x00000001
MAX=63 CAME=4 STS=0x00000000 ACTIVE=0x00000002
MAX=64 CAME=1 STS=0x00000000 ACTIVE=0x00000002
MAX=65 CAME=1 STS=0x00000000 ACTIVE=0x00000002
MAX=66 CAME=4 STS=0x00000000 ACTIVE=0x00000001
MAX=67 CAME=1 STS=0x00000000 ACTIVE=0x00000001
MAX=68 CAME=1 STS=0x00000000 ACTIVE=0x00000001
MAX=69 CAME=4 STS=0x00000000 ACTIVE=0x00000002
MAX=70 CAME=1 STS=0x00000000 ACTIVE=0x00000002
MAX=71 CAME=1 STS=0x00000000 ACTIVE=0x00000002
MAX=72 CAME=4 STS=0x00000000 ACTIVE=0x00000001
MAX=73 CAME=1 STS=0x00000000 ACTIVE=0x00000001
MAX=74 CAME=1 STS=0x00000000 ACTIVE=0x00000001
MAX=75 CAME=4 STS=0x00000000 ACTIVE=0x00000002
MAX=76 CAME=1 STS=0x00000000 ACTIVE=0x00000002
MAX=77 CAME=1 STS=0x00000000 ACTIVE=0x00000002
MAX=78 CAME=4 STS=0x00000000 ACTIVE=0x00000001
MAX=79 CAME=1 STS=0x00000000 ACTIVE=0x00000001
MAX=80 CAME=1 STS=0x00000000 ACTIVE=0x00000001
MAX=81 CAME=4 STS=0x00000000 ACTIVE=0x00000002
MAX=82 CAME=1 STS=0x00000000 ACTIVE=0x00000002
MAX=83 CAME=1 STS=0x00000000 ACTIVE=0x00000002
MAX=84 CAME=4 STS=0x00000000 ACTIVE=0x00000000
MAX=85 CAME=1 STS=0x00000000 ACTIVE=0x00000000
MAX=86 CAME=1 STS=0x00000000 ACTIVE=0x00000000
smsc0: warning: Failed to read register 0x114
smsc0: warning: MII is busy
[...]


-asc