IB/hfi1: Fix a subcontext memory leak

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The only context that frees user_exp_rcv data structures is the last
context closed (from a sub-context set).  This leaks the allocations
from the other sub-contexts.  Separate the common frees from the
specific frees and call them at the appropriate time.

Using KEDR to check for memory leaks we get:

Before test:

[leak_check] Possible leaks: 25

After test:

[leak_check] Possible leaks: 31  (6 leaked data structures)

After patch applied (before and after test have the same value)

[leak_check] Possible leaks: 25

Each leak is 192 + 13440 + 6720 = 20352 bytes per sub-context.

Cc: stable@vger.kernel.org
Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Michael J. Ruhl <michael.j.ruhl@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

...

This commit is contained in:

Michael J. Ruhl 2017-05-04 05:14:34 -07:00 • committed by Doug Ledford

parent 94679061dc

commit 224d71f910

3 changed files with 23 additions and 15 deletions

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5

drivers/infiniband/hw/hfi1/file_ops.c

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32

drivers/infiniband/hw/hfi1/user_exp_rcv.c

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1

drivers/infiniband/hw/hfi1/user_exp_rcv.h

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