twa0 errors and system lockup on amd64

[Josh Endries]

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Hello,

Just a little while ago I got this on a test 5.4-stable dual Opteron
box I'm setting up (9500S-LP RAID 5 with a hot spare):

Aug  8 15:58:21 kernel: twa0: ERROR: (0x05: 0x210b): Request timed
out!: request = 0xffffffff80a67700
Aug  8 15:58:21 kernel: twa0: INFO: (0x16: 0x1108): Resetting
controller...:
Aug  8 15:58:21 kernel: twa0: ERROR: (0x15: 0x110b): Can't drain AEN
queue after reset: error = 60
Aug  8 15:58:21 kernel: twa0: ERROR: (0x16: 0x1105): Controller
reset failed: error = 60; attempt 1

It attempted twice and then just sat there after that. I couldn't
log in at all so I did a hard reset after probably 30+ minutes. I
didn't find much online other than driver source code or twe(4) man
pages, which suggests that it's a problem between the driver and
card. Has anyone else seen this problem? Is it a sign of a flaky
card or could it be something else? Maybe it's something to do with
AMD64? This system was supposed to go into production tomorrow. I
guess it's good that it died today...

Josh
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