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Message-Id: <200701240010.37540.hnguyen@linux.vnet.ibm.com>
Date: Wed, 24 Jan 2007 00:10:36 +0100
From: Hoang-Nam Nguyen <hnguyen@...ux.vnet.ibm.com>
To: Roland Dreier <rdreier@...co.com>, hch@...radead.org,
linux-kernel@...r.kernel.org, linuxppc-dev@...abs.org,
openib-general@...nib.org, openfabrics-ewg@...nib.org
Cc: raisch@...ibm.com
Subject: [PATCH 2.6.21 1/4] ehca: fix improper use of yield with spinlock held
Here is a patch for ehca_cq.c that fixes improper use of yield
with spinlock held.
Thanks
Nam
Signed-off-by: Hoang-Nam Nguyen <hnguyen@...ibm.com>
---
ehca_cq.c | 5 ++++-
1 files changed, 4 insertions(+), 1 deletion(-)
diff -Nurp infiniband_orig/drivers/infiniband/hw/ehca/ehca_cq.c infiniband_work/drivers/infiniband/hw/ehca/ehca_cq.c
--- infiniband_orig/drivers/infiniband/hw/ehca/ehca_cq.c 2007-01-19 19:40:32.000000000 +0100
+++ infiniband_work/drivers/infiniband/hw/ehca/ehca_cq.c 2007-01-20 00:15:34.000000000 +0100
@@ -344,8 +344,11 @@ int ehca_destroy_cq(struct ib_cq *cq)
unsigned long flags;
spin_lock_irqsave(&ehca_cq_idr_lock, flags);
- while (my_cq->nr_callbacks)
+ while (my_cq->nr_callbacks) {
+ spin_unlock_irqrestore(&ehca_cq_idr_lock, flags);
yield();
+ spin_lock_irqsave(&ehca_cq_idr_lock, flags);
+ }
idr_remove(&ehca_cq_idr, my_cq->token);
spin_unlock_irqrestore(&ehca_cq_idr_lock, flags);
-
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