usb: uas: unconditionally bring back host after reset

[Oliver Neukum <oneukum@suse.com>]

Am Donnerstag, den 11.01.2018, 12:22 +0100 schrieb Greg KH:
> On Thu, Jan 11, 2018 at 11:59:54AM +0100, Oliver Neukum wrote:
> > 
> > Quoting Hans:
> > 
> > If we return 1 from our post_reset handler, then our disconnect handler
> > will be called immediately afterwards. Since pre_reset blocks all scsi
> > requests our disconnect handler will then hang in the scsi_remove_host
> > call.
> > 
> > This is esp. bad because our disconnect handler hanging for ever also
> > stops the USB subsys from enumerating any new USB devices, causes commands
> > like lsusb to hang, etc.
> > 
> > In practice this happens when unplugging some uas devices because the hub
> > code may see the device as needing a warm-reset and calls usb_reset_device
> > before seeing the disconnect. In this case uas_configure_endpoints fails
> > with -ENODEV. We do not want to print an error for this, so this commit
> > also silences the shost_printk for -ENODEV.
> > 
> > ENDQUOTE
> > 
> > However, if we do that we better drop any unconditional execution
> > and report to the SCSI subsystem that we have undergone a reset
> > but we are not operational now.
> > 
> > Signed-off-by: Oliver Neukum <oneukum@suse.com>
> > Reported-by: Hans de Goede <hdegoede@redhat.com>
> > CC: stable@vger.kernel.org
> > ---
> >  Makefile                  | 2 +-
> 
> I don't think you want me to patch this file :)

Hi,

sorry, yes, I do not want you to do that.

	Sorry
		Oliver
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