Re: "blk-mq: fix tag_get wait task can't be awakened" causes hangs

[Daniel Palmer]

Hi Alex,

Same issue here. I just spent an hour bisecting the issue and hit the
same commit you did.

If I try to dd from a USB card reader to null I can see a few commands
wake up the thread that usb storage uses and then nothing more.
The user process then blocks forever waiting for the data it asked for.

Cheers,

Daniel