[openib-general] ib_mthca "NOP command failed to generate interrupt (IRQ 169), aborting."

[Don.Albert at Bull.com]

Roland,

Thanks for the quick response, and the suggestions.  See below:

>  > Machine:        EM64T
>  > HCA :           Mellanox Technologies MT25208 InfiniHost III Ex 
(Tavor 
>  > compatibility mode) (rev a0)
>  > Old Kernel:             2.6.14  New Kernel              2.6.15.6
>  > Old OpenIB revision:    3929    New OpenIB revision:    5685
> 
> Hmm, quite a lot has changed between those two revisions, but I
> haven't heard of things breaking.
> 
> Some things to try:
>  - Build with CONFIG_INFINIBAND_MTHCA_DEBUG turned on, and see if
>    there's anything enlightening in the kernel log.
>  - Update your HCA FW to 4.7.400 -- it shouldn't matter but 4.6.0 has
>    a lot of known bugs so it can't hurt.
>  - Update to the latest svn rev, if you want to run svn drivers.  Or
>    you could try the stock drivers in 2.6.15.6.
>  - Try passing the option "fw_cmd_doorbell=0" when loading ib_mthca.
>    Again, it shouldn't matter but maybe it does.

I tried passing the option first, since it was the simplest and quickest
thing to try.  It worked.   The module now loads successfully.

I will look into updating the firmware as well,  but for now I can 
proceed with other testing.

>  - Try a binary search of svn revisions between 3929 and 5685 to
>    figure out when the driver stopped working.
> 
>  - R.

Don Albert
Bull HN Information Systems
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