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From: Hans de Goede <hdegoede-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
To: Oliver Neukum <oneukum-IBi9RG/b67k@public.gmane.org>,
	George Cherian
	<gcherian-M3mlKVOIwJVv6pq1l3V1OdBPR1lH4CV8@public.gmane.org>
Cc: stern-nwvwT67g6+6dFdvTe/nMLpVzexx5G7lz@public.gmane.org,
	linux-scsi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	linux-usb-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: Re: JMS56x not working reliably with uas driver
Date: Wed, 21 Dec 2016 12:54:19 +0100	[thread overview]
Message-ID: <dcf2ff86-2d40-b9a9-4bc2-16a6b23ba480@redhat.com> (raw)
In-Reply-To: <1482320547.7638.7.camel-IBi9RG/b67k@public.gmane.org>

Hi,

On 21-12-16 12:42, Oliver Neukum wrote:
> On Wed, 2016-12-21 at 17:09 +0530, George Cherian wrote:
>> Hi Oliver,
>>
>> I was working with this JMicron device and using the uas driver.
>> I am seeing the following 2 issues.
>>
>> 1) On connect I see the following messages.
>
> Thanks. Do you want to submit it to Greg?
> The patch is fine.
>
>> 2) On disconnect I am seeing the following issue
>>
>>   scsi host4: uas_post_reset: alloc streams error -19 after reset
>>   sd 4:0:0:0: [sdb] Synchronizing SCSI cache
>>
>> This is more fatal because after these messages the USB port becomes
>> unusable. Even an lsusb invocation hangs for ever.
>
> Ouch. That points to a logic error. We should not reset if
> a device is gone.

Ah good point, so instead of just seeing a disconnect, something
is triggering a reset, and then we try to alloc stream on the
disconnected usb port and that apparently makes the xhci controller
quite unhappy.

Regards,

Hans
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  parent reply	other threads:[~2016-12-21 11:54 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-12-21 11:39 JMS56x not working reliably with uas driver George Cherian
2016-12-21 11:42 ` Oliver Neukum
     [not found]   ` <1482320547.7638.7.camel-IBi9RG/b67k@public.gmane.org>
2016-12-21 11:54     ` Hans de Goede [this message]
2016-12-21 11:54       ` Oliver Neukum
2016-12-21 12:07   ` George Cherian
2016-12-21 12:12     ` Oliver Neukum
2016-12-21 12:20     ` Hans de Goede
2016-12-21 12:47       ` George Cherian
     [not found]         ` <585A79F5.7080701-M3mlKVOIwJVv6pq1l3V1OdBPR1lH4CV8@public.gmane.org>
2016-12-21 14:39           ` Oliver Neukum
     [not found]             ` <1482331185.7638.14.camel-IBi9RG/b67k@public.gmane.org>
2016-12-22  2:04               ` George Cherian
     [not found]                 ` <98b66992-826f-7073-2a1d-eee6a2a9590f-M3mlKVOIwJVv6pq1l3V1OdBPR1lH4CV8@public.gmane.org>
2016-12-22 10:13                   ` George Cherian
2016-12-22 11:25                     ` Oliver Neukum
2016-12-21 11:50 ` Hans de Goede
     [not found] ` <585A69E6.6040009-M3mlKVOIwJVv6pq1l3V1OdBPR1lH4CV8@public.gmane.org>
2016-12-22 22:44   ` Alan Stern
2016-12-23  3:01     ` George Cherian
2016-12-23 14:22       ` Alan Stern
2016-12-27 14:34     ` Oliver Neukum
     [not found]       ` <1482849255.1731.1.camel-IBi9RG/b67k@public.gmane.org>
2016-12-27 15:20         ` Alan Stern
     [not found]           ` <Pine.LNX.4.44L0.1612271015100.21478-100000-pYrvlCTfrz9XsRXLowluHWD2FQJk+8+b@public.gmane.org>
2016-12-27 15:53             ` Oliver Neukum
2016-12-27 18:22           ` George Cherian
2016-12-28  2:19             ` Alan Stern
2016-12-29  8:28               ` Oliver Neukum

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