From 29666128a22ddc78b3e393674ef69462835db43f Mon Sep 17 00:00:00 2001 From: Roland Dreier Date: Wed, 29 Nov 2006 15:33:07 -0800 Subject: RDMA/amso1100: Fix section mismatches The amso1100 driver was missing a couple of __devinit/__devexit annotations for init/cleanup functions that are called from __devinit/__devexit functions. Reported by Randy Dunlap . Signed-off-by: Roland Dreier --- drivers/infiniband/hw/amso1100/c2_rnic.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers/infiniband/hw/amso1100') diff --git a/drivers/infiniband/hw/amso1100/c2_rnic.c b/drivers/infiniband/hw/amso1100/c2_rnic.c index 623dc95f91df..1687c511cb2f 100644 --- a/drivers/infiniband/hw/amso1100/c2_rnic.c +++ b/drivers/infiniband/hw/amso1100/c2_rnic.c @@ -441,7 +441,7 @@ static int c2_rnic_close(struct c2_dev *c2dev) * involves initalizing the various limits and resouce pools that * comprise the RNIC instance. */ -int c2_rnic_init(struct c2_dev *c2dev) +int __devinit c2_rnic_init(struct c2_dev *c2dev) { int err; u32 qsize, msgsize; @@ -611,7 +611,7 @@ int c2_rnic_init(struct c2_dev *c2dev) /* * Called by c2_remove to cleanup the RNIC resources. */ -void c2_rnic_term(struct c2_dev *c2dev) +void __devexit c2_rnic_term(struct c2_dev *c2dev) { /* Close the open adapter instance */ -- cgit v1.2.1 From e54f81889cd5228e7087637c377d76301c7c5663 Mon Sep 17 00:00:00 2001 From: Roland Dreier Date: Wed, 29 Nov 2006 15:33:07 -0800 Subject: IB: Convert kmem_cache_t -> struct kmem_cache Signed-off-by: Roland Dreier --- drivers/infiniband/hw/amso1100/c2.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/infiniband/hw/amso1100') diff --git a/drivers/infiniband/hw/amso1100/c2.h b/drivers/infiniband/hw/amso1100/c2.h index 1b17dcdd0505..04a9db5de881 100644 --- a/drivers/infiniband/hw/amso1100/c2.h +++ b/drivers/infiniband/hw/amso1100/c2.h @@ -302,7 +302,7 @@ struct c2_dev { unsigned long pa; /* PA device memory */ void **qptr_array; - kmem_cache_t *host_msg_cache; + struct kmem_cache *host_msg_cache; struct list_head cca_link; /* adapter list */ struct list_head eh_wakeup_list; /* event wakeup list */ -- cgit v1.2.1 From c9edea298e52faeb0d4ae875cb712a5d69ba1966 Mon Sep 17 00:00:00 2001 From: Krishna Kumar Date: Fri, 24 Nov 2006 16:03:48 +0530 Subject: RDMA/amso1100: Prevent deadlock in destroy QP It is possible to swap the CQs used for send_cq and recv_cq when creating two different QPs. If these two QPs are then destroyed at the same time, an AB-BA deadlock can occur because the CQ locks are taken our of order. Fix this by always taking CQ locks in a fixed order. Signed-off-by: Krishna Kumar Signed-off-by: Roland Dreier --- drivers/infiniband/hw/amso1100/c2_qp.c | 36 ++++++++++++++++++++++++++-------- 1 file changed, 28 insertions(+), 8 deletions(-) (limited to 'drivers/infiniband/hw/amso1100') diff --git a/drivers/infiniband/hw/amso1100/c2_qp.c b/drivers/infiniband/hw/amso1100/c2_qp.c index 5bcf697aa335..179d005ed4a5 100644 --- a/drivers/infiniband/hw/amso1100/c2_qp.c +++ b/drivers/infiniband/hw/amso1100/c2_qp.c @@ -564,6 +564,32 @@ int c2_alloc_qp(struct c2_dev *c2dev, return err; } +static inline void c2_lock_cqs(struct c2_cq *send_cq, struct c2_cq *recv_cq) +{ + if (send_cq == recv_cq) + spin_lock_irq(&send_cq->lock); + else if (send_cq > recv_cq) { + spin_lock_irq(&send_cq->lock); + spin_lock_nested(&recv_cq->lock, SINGLE_DEPTH_NESTING); + } else { + spin_lock_irq(&recv_cq->lock); + spin_lock_nested(&send_cq->lock, SINGLE_DEPTH_NESTING); + } +} + +static inline void c2_unlock_cqs(struct c2_cq *send_cq, struct c2_cq *recv_cq) +{ + if (send_cq == recv_cq) + spin_unlock_irq(&send_cq->lock); + else if (send_cq > recv_cq) { + spin_unlock(&recv_cq->lock); + spin_unlock_irq(&send_cq->lock); + } else { + spin_unlock(&send_cq->lock); + spin_unlock_irq(&recv_cq->lock); + } +} + void c2_free_qp(struct c2_dev *c2dev, struct c2_qp *qp) { struct c2_cq *send_cq; @@ -576,15 +602,9 @@ void c2_free_qp(struct c2_dev *c2dev, struct c2_qp *qp) * Lock CQs here, so that CQ polling code can do QP lookup * without taking a lock. */ - spin_lock_irq(&send_cq->lock); - if (send_cq != recv_cq) - spin_lock(&recv_cq->lock); - + c2_lock_cqs(send_cq, recv_cq); c2_free_qpn(c2dev, qp->qpn); - - if (send_cq != recv_cq) - spin_unlock(&recv_cq->lock); - spin_unlock_irq(&send_cq->lock); + c2_unlock_cqs(send_cq, recv_cq); /* * Destory qp in the rnic... -- cgit v1.2.1