USB2 umass not working in 5.4-RELEASE

[Alexander S. Usov]

Hi!

It looks that relatively recently (not more than a month I tnink)
something was broken in ehci. Trying to write to msdosfs/ext3fs
mounted from external usb2 drive blocks quite qickly.
Writing process gets stuck in wdrain state, and disk seems
unresponsive -- it just lights up the lamp and does nothing.

Any suggestions what what to check to make a usefull bug report?

-- 
Best regards,
  Alexander.