linux-kernel - [PATCH 2.6.20 1/2] ehca: ehca_cq.c: fix unproper use of yield within spinlock context

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Message-Id: <200701192250.10765.hnguyen@linux.vnet.ibm.com>
Date:	Fri, 19 Jan 2007 22:50:10 +0100
From:	Hoang-Nam Nguyen <hnguyen@...ux.vnet.ibm.com>
To:	Roland Dreier <rdreier@...co.com>, linux-kernel@...r.kernel.org,
	linuxppc-dev@...abs.org, openfabrics-ewg@...nib.org,
	openib-general@...nib.org
Cc:	raisch@...ibm.com
Subject: [PATCH 2.6.20 1/2] ehca: ehca_cq.c: fix unproper use of yield within spinlock context

Hello Roland!
This is a patch for ehca_cq.c that fixes unproper use of yield within
spinlock context.
Thanks
Nam


Signed-off-by Hoang-Nam Nguyen <hnguyen@...ibm.com>
---


 ehca_cq.c |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletion(-)


diff --git a/drivers/infiniband/hw/ehca/ehca_cq.c b/drivers/infiniband/hw/ehca/ehca_cq.c
index 93995b6..6074c89 100644
--- a/drivers/infiniband/hw/ehca/ehca_cq.c
+++ b/drivers/infiniband/hw/ehca/ehca_cq.c
@@ -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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