Bug 16245 - Powercom BNT-800AP (cypress_m8 usb->serial inside) doesn't work with NUT on 2.6.34 kernel
Summary: Powercom BNT-800AP (cypress_m8 usb->serial inside) doesn't work with NUT on 2...
Status: RESOLVED CODE_FIX
Alias: None
Product: Drivers
Classification: Unclassified
Component: Serial (show other bugs)
Hardware: All Linux
: P1 normal
Assignee: Russell King
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2010-06-18 10:31 UTC by NiTr0
Modified: 2012-07-20 13:11 UTC (History)
4 users (show)

See Also:
Kernel Version: 2.6.34
Subsystem:
Regression: Yes
Bisected commit-id:

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Description NiTr0 2010-06-18 10:31:07 UTC 
I upgraded kernel to 2.6.34, and found that this kernel doesn't work correctly
with my UPS USB->serial (cypress_m8 based). ttyUSB0 was successfully created,
but nut can't read response from UPS. At startup I get such message:

Network UPS Tools - UPS driver controller 2.4.1
Network UPS Tools - PowerCom protocol UPS driver 0.12 (2.4.1)
data receiving error (0 instead of 16 bytes)
data receiving error (0 instead of 16 bytes) 
 
After compiling driver from 2.6.32.7 kernel for 2.6.34 - all works OK.
Comment 1 Andrew Morton 2010-06-21 21:29:26 UTC 
(switched to email.  Please respond via emailed reply-to-all, not via the
bugzilla web interface).

On Fri, 18 Jun 2010 10:31:12 GMT
bugzilla-daemon@bugzilla.kernel.org wrote:

> https://bugzilla.kernel.org/show_bug.cgi?id=16245
> 
>            Summary: Powercom BNT-800AP (cypress_m8 usb->serial inside)
>                     doesn't work with NUT on 2.6.34 kernel
>            Product: Drivers
>            Version: 2.5
>     Kernel Version: 2.6.34
>           Platform: All
>         OS/Version: Linux
>               Tree: Mainline
>             Status: NEW
>           Severity: normal
>           Priority: P1
>          Component: Serial
>         AssignedTo: rmk@arm.linux.org.uk
>         ReportedBy: nitr0@seti.kr.ua
>         Regression: No
> 
> 
> I upgraded kernel to 2.6.34, and found that this kernel doesn't work
> correctly
> with my UPS USB->serial (cypress_m8 based). ttyUSB0 was successfully created,
> but nut can't read response from UPS. At startup I get such message:
> 
> Network UPS Tools - UPS driver controller 2.4.1
> Network UPS Tools - PowerCom protocol UPS driver 0.12 (2.4.1)
> data receiving error (0 instead of 16 bytes)
> data receiving error (0 instead of 16 bytes) 
> 
> After compiling driver from 2.6.32.7 kernel for 2.6.34 - all works OK.
> 

Looks like s 2.6.32 -> 2.6.34 USB regression.
Comment 2 Rafael J. Wysocki 2010-06-21 22:02:59 UTC 
Does 2.6.33.y work?
Comment 3 NiTr0 2010-06-22 11:53:23 UTC 
As I see in git, 2.6.33 haven't changes in cypress_m8 compared to 2.6.32, last commit in both trees - 2009-10-09 by Oliver Neukum...
Comment 4 NiTr0 2010-08-08 07:02:06 UTC 
On 2.6.35 kernel all seems to be OK.
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