Bug 97801

Summary:	ExpressCard type USB3.0 adapter does not work on hotplug
Product:	Drivers	Reporter:	Donatas G. (dgvirtual)
Component:	PCI	Assignee:	drivers_pci (drivers_pci)
Status:	NEW ---
Severity:	normal	CC:	szg00000
Priority:	P1
Hardware:	All
OS:	Linux
Kernel Version:	4.1.0-040100rc2-generic	Subsystem:
Regression:	No	Bisected commit-id:
Attachments:	output of dmesg on kernel 4.1.0-040100rc2-generic output of lspci -vv on kernel 4.1.0-040100rc2-generic output of dmesg on 3.13.0-031300-generic (i386 machine) output of lspci -vv on 3.13.0-031300-generic (i386 machine)

Description Donatas G. 2015-05-06 16:37:07 UTC

Created attachment 176011 [details]
output of dmesg on kernel 4.1.0-040100rc2-generic

ExpressCard type USB3.0 adapter for laptop does not work on hotplug with the 
current mainline kernel 4.1.0-040100rc2-generic â€“ devices attached to it do 
not get reported by the system as attached and cannot get mounted/function. 
The hotplug does work on an older kernel (giving 3x read spead from an 
external USB 3.0 drive), so it looks like a regression. However, when booted 
with the device attached, the adapter and the attached devices do function 
properly - the attached devices work fine both coldplugged and hotplugged.

The adapter in question: 2 Port USB3.0 expressCard, UNEC UPD720202 Chip see 
here for description 
http://www.amazon.co.uk/SuperSpeed-compatible-transfer-Notebook-internal/dp/B00K49TNUU

Comment 1 Donatas G. 2015-05-06 16:38:05 UTC

Created attachment 176021 [details]
output of lspci -vv on kernel 4.1.0-040100rc2-generic

Comment 2 Donatas G. 2015-05-06 19:37:26 UTC

Created attachment 176071 [details]
output of dmesg on 3.13.0-031300-generic (i386 machine)

Latest kernel where hotplug is known to work - 3.13.0-031300-generic (mainline kernel; Ubuntu 3.13.0 kernel also works). I am attaching dmesg and lspci output generated on an older machine (Asus A8F, i386 kernel architecture, while the problem with v4 kernel was detected on a amd64 machine - Lenovo thinkpad x220t).

Comment 3 Donatas G. 2015-05-06 19:38:24 UTC

Created attachment 176081 [details]
output of lspci -vv on 3.13.0-031300-generic (i386 machine)