lkml.org 
[lkml]   [2019]   [Mar]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRE: [PATCH] usb: uas: fix usb subsystem hang after power off hub port
Date
Hi,

>> And the return value(-ENODEV) will be returned to error handler.
>> uas_eh_device_reset_handler->usb_reset_device -> usb_reset_and_verify_device (return -ENODEV) Then I wrote that commit message that we think even if we ignore "ENODEV" in post reset to avoid hang issue but the error will also be reported to error handler.
>> #If ignore an error and the error will not be reported then it is not good.
>
>Well, what do we do now? Are you saying that the state model SCSI is using is wrong?

No, it is not wrong.
But I think we may want to prevend hang by sleep peocess with continuing to take a lock at blk_execute_rq() from usb_unbind_and_rebind_marded_interfaces().

Regards,
Kento Kobayashi
\
 
 \ /
  Last update: 2019-03-15 03:29    [W:0.145 / U:0.012 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site