regression: msk0 watchdog timeout and interrupt storm

[Boris Samorodov]

Hi Yonghyeon and All,

>From time to time I use a notebook and boot FreeBSD from USB
stick. FreeBSD 9.2-i386 works OK. So I tried to use
FreeBSD 10.0-i386 BETA2 and the network adapter works for
some 10-15 seconds and then stops with diagnostic message
"msk0:watchdog timeout". I've found similar case at
freebsd-current@ with no workaround. Yes, there is an
interrupt storm as well.

Here is some additional info:
-----
mskc0 at pci0:3:0:0:       class=0x020000 card=0xff501179 chip=0x435511ab
rev=0x12 hdr=0x00
    vendor     = 'Marvell Technology Group Ltd.'
    device     = '88E8040T PCI-E Fast Ethernet Controller'
    class      = network
    subclass   = ethernet
    cap 01[48] = powerspec 3  supports D0 D1 D2 D3  current D0
    cap 05[5c] = MSI supports 1 message, 64 bit enabled with 1 message
    cap 10[c0] = PCI-Express 2 legacy endpoint max data 128(128) link x1(x1)
                 speed 2.5(2.5) ASPM disabled(L0s/L1)
    ecap 0001[100] = AER 1 0 fatal 0 non-fatal 1 corrected
    ecap 0003[130] = Serial 1 b8b063ffff681e00
-----

-- 
WBR, Boris Samorodov (bsam)
FreeBSD Committer, http://www.FreeBSD.org The Power To Serve