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IB/ehca: Serialize hypervisor calls in ehca_register_mr()

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Some pSeries hypervisor versions show a race condition in the allocate
MR hCall.  Serialize this call per adapter to circumvent this problem.

Signed-off-by: Joachim Fenkes <fenkes@de.ibm.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
This commit is contained in:
Stefan Roscher
2007-05-09 13:47:56 +02:00
committed by Roland Dreier
parent 8f140b407f
commit 5d88278e3b
3 changed files with 14 additions and 2 deletions
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2
drivers/infiniband/hw/ehca/ehca_main.c
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@@ -98,6 +98,7 @@ MODULE_PARM_DESC(scaling_code,
spinlock_t ehca_qp_idr_lock;
spinlock_t ehca_cq_idr_lock;
spinlock_t hcall_lock;
DEFINE_IDR(ehca_qp_idr);
DEFINE_IDR(ehca_cq_idr);
@@ -817,6 +818,7 @@ int __init ehca_module_init(void)
idr_init(&ehca_cq_idr);
spin_lock_init(&ehca_qp_idr_lock);
spin_lock_init(&ehca_cq_idr_lock);
spin_lock_init(&hcall_lock);
INIT_LIST_HEAD(&shca_list);
spin_lock_init(&shca_list_lock);