ib_isert: Add max_send_sge=2 minimum for control PDU responses

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This patch adds a max_send_sge=2 minimum in isert_conn_setup_qp()
to ensure outgoing control PDU responses with tx_desc->num_sge=2
are able to function correctly.

This addresses a bug with RDMA hardware using dev_attr.max_sge=3,
that in the original code with the ConnectX-2 work-around would
result in isert_conn->max_sge=1 being negotiated.

Originally reported by Chris with ocrdma driver.

Reported-by: Chris Moore <Chris.Moore@emulex.com>
Tested-by: Chris Moore <Chris.Moore@emulex.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Cc: <stable@vger.kernel.org> # 3.10+
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>

...

This commit is contained in:

Or Gerlitz 2014-10-22 14:55:49 -07:00 • committed by Nicholas Bellinger

parent ab477c1ff5

commit f57915cfa5

1 changed files with 5 additions and 2 deletions

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drivers/infiniband/ulp/isert/ib_isert.c

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