USB/umass detach freezes system

[Rob]

Cyril Guibourg wrote:
> Rob <stopspam at users.sourceforge.net> writes:
> 
> 
>>Mounting this device with "mount_msdos /dev/da0s1 /mnt" is okay.
>>The umass filesystem is there. Problems start when unmounting it.
>>The umount command will hang and eventually the whole system will hang.
>>Power off/on is only what helps then.
> 
> 
> Welcome on board. I have the same issue and sometimes the system reboots.
> It seems it worked better with 4.10-RC1 and starting with RC2 I am back
> to 4.9 behaviour.
> 
> 
>>Any ideas how to deal with this?
> 
> 
> I would be glad to have the answer to that question. I compiled a kernel
> with debug code and tried to figure out what is wrong without any success.
> I asked for some help here but got no answer, good luck.

Today someone has posted a patch for USB on the CURRENT mailing list, which
seems to address this problem. Only bad-luck: the patch applies to CURRENT.

Rob.