IB/ipoib: Avoid multicast join attempts with invalid P_key

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Currently, the parent interface keeps sending broadcast group join
requests even if p_key index 0 is invalid, which is possible/common in
virtualized environments where a VF has been probed to VM but the
actual P_key configuration has not yet been assigned by the management
software. This creates unnecessary noise on the fabric and in the
kernel logs:

    ib0: multicast join failed for ff12:401b:8000:0000:0000:0000:ffff:ffff, status -22

The original code run the multicast task regardless of the actual
P_key value, which can be avoided. The fix is to re-init resources and
bring interface up only if P_key index 0 is valid either when starting
up or on PKEY_CHANGE event.

Fixes: c290414169 ("IPoIB: Fix pkey change flow for virtualization environments")
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Alex Estrin <alex.estrin@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>

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This commit is contained in:

Alex Estrin 2014-08-06 14:40:32 -04:00 • committed by Roland Dreier

parent 4eae374845

commit dd57c9308a

2 changed files with 46 additions and 45 deletions

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80

drivers/infiniband/ulp/ipoib/ipoib_ib.c

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11

drivers/infiniband/ulp/ipoib/ipoib_main.c

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