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Description : 

linux-2.6.32-s390-qdio_input_error.patch

Description: qdio: reset error states immediately
Symptom:     Connection stall on OSA cards.
Problem:     The qdio hardware may surpress further interrupts as long as a
             SBAL is in the error state. That can lead to unnotified data in
             the SBALs following the error state.
Solution:    Change the SBAL[s] in error state immediately to another program
             owned state so interrupts are again received for further traffic
             on the device.

Architecture details :
-----------------
Server architecture(s):		  System z
Server type:			  s390x
General component:		  kernel
Other components involved:	  No

Does the server have the latest GA firmware?
  Yes.

Has the problem been shown to occur on more than one system?
  Yes.

Is a tested patch available?
  Yes.

If yes to the above, has it been approved upstream?
 
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=bffbbd2df4196a73ffdc16709866dd96eb66aad8

What is the latest official Red Hat build on which this bug has been seen?
  RHEL6.1


The patch has been tested, fixes the problem, and is part of the upstream
kernel.

With best regards,
     Hendrik

Created attachment 495534 [details]
linux-2.6.32-s390-qdio_input_error.patch

------- Comment From vahegde1.ibm.com 2011-05-20 02:44 EDT-------
Hello Red Hat,

Any update on this bug ?

Thanks
Vasant

The patch has been posted to rhkernel by Hendrik Brueckner <brueckner>

This request was evaluated by Red Hat Product Management for inclusion
in a Red Hat Enterprise Linux maintenance release. Product Management has 
requested further review of this request by Red Hat Engineering, for potential
inclusion in a Red Hat Enterprise Linux Update release for currently deployed 
products. This request is not yet committed for inclusion in an Update release.

Patch(es) available on kernel-2.6.32-170.el6

------- Comment From mgrf.com 2011-10-25 07:11 EDT-------
This fix is verified included on RHEL 6.2 snapshots
- closing verified on IBM site. Thx

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

http://rhn.redhat.com/errata/RHSA-2011-1530.html