Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=fffba373ef8cc9a5881353395c4edd1ab27cf154
Commit: fffba373ef8cc9a5881353395c4edd1ab27cf154
Parent: 1bae4dbf9576e563da23927e4078fffbbce67a75
Author: Joachim Fenkes <[EMAIL PROTECTED]>
AuthorDate: Thu May 24 16:51:05 2007 +0200
Committer: Roland Dreier <[EMAIL PROTECTED]>
CommitDate: Mon Jul 9 16:17:32 2007 -0700
IB/ehca: Refactor "maybe missed event" code
Refactor the ehca changes from commit ed23a727 ("IB: Return "maybe
missed event" hint from ib_req_notify_cq()") so the queue arithmetic
is done in slightly fewer lines. Also, move the spinlock flags into
the block they're used in.
Signed-off-by: Joachim Fenkes <[EMAIL PROTECTED]>
Signed-off-by: Roland Dreier <[EMAIL PROTECTED]>
---
drivers/infiniband/hw/ehca/ehca_reqs.c | 2 +-
drivers/infiniband/hw/ehca/ipz_pt_fn.h | 28 ++++++++++------------------
2 files changed, 11 insertions(+), 19 deletions(-)
diff --git a/drivers/infiniband/hw/ehca/ehca_reqs.c
b/drivers/infiniband/hw/ehca/ehca_reqs.c
index caec9de..56c4527 100644
--- a/drivers/infiniband/hw/ehca/ehca_reqs.c
+++ b/drivers/infiniband/hw/ehca/ehca_reqs.c
@@ -637,7 +637,6 @@ poll_cq_exit0:
int ehca_req_notify_cq(struct ib_cq *cq, enum ib_cq_notify_flags notify_flags)
{
struct ehca_cq *my_cq = container_of(cq, struct ehca_cq, ib_cq);
- unsigned long spl_flags;
int ret = 0;
switch (notify_flags & IB_CQ_SOLICITED_MASK) {
@@ -652,6 +651,7 @@ int ehca_req_notify_cq(struct ib_cq *cq, enum
ib_cq_notify_flags notify_flags)
}
if (notify_flags & IB_CQ_REPORT_MISSED_EVENTS) {
+ unsigned long spl_flags;
spin_lock_irqsave(&my_cq->spinlock, spl_flags);
ret = ipz_qeit_is_valid(&my_cq->ipz_queue);
spin_unlock_irqrestore(&my_cq->spinlock, spl_flags);
diff --git a/drivers/infiniband/hw/ehca/ipz_pt_fn.h
b/drivers/infiniband/hw/ehca/ipz_pt_fn.h
index 57f141a..007f088 100644
--- a/drivers/infiniband/hw/ehca/ipz_pt_fn.h
+++ b/drivers/infiniband/hw/ehca/ipz_pt_fn.h
@@ -105,7 +105,6 @@ void *ipz_qpageit_get_inc(struct ipz_queue *queue);
* step in struct ipz_queue, will wrap in ringbuffer
* returns address (kv) of Queue Entry BEFORE increment
* warning don't use in parallel with ipz_qpageit_get_inc()
- * warning unpredictable results may occur if steps>act_nr_of_queue_entries
*/
static inline void *ipz_qeit_get_inc(struct ipz_queue *queue)
{
@@ -121,31 +120,24 @@ static inline void *ipz_qeit_get_inc(struct ipz_queue
*queue)
}
/*
+ * return a bool indicating whether current Queue Entry is valid
+ */
+static inline int ipz_qeit_is_valid(struct ipz_queue *queue)
+{
+ struct ehca_cqe *cqe = ipz_qeit_get(queue);
+ return ((cqe->cqe_flags >> 7) == (queue->toggle_state & 1));
+}
+
+/*
* return current Queue Entry, increment Queue Entry iterator by one
* step in struct ipz_queue, will wrap in ringbuffer
* returns address (kv) of Queue Entry BEFORE increment
* returns 0 and does not increment, if wrong valid state
* warning don't use in parallel with ipz_qpageit_get_inc()
- * warning unpredictable results may occur if steps>act_nr_of_queue_entries
*/
static inline void *ipz_qeit_get_inc_valid(struct ipz_queue *queue)
{
- struct ehca_cqe *cqe = ipz_qeit_get(queue);
- u32 cqe_flags = cqe->cqe_flags;
-
- if ((cqe_flags >> 7) != (queue->toggle_state & 1))
- return NULL;
-
- ipz_qeit_get_inc(queue);
- return cqe;
-}
-
-static inline int ipz_qeit_is_valid(struct ipz_queue *queue)
-{
- struct ehca_cqe *cqe = ipz_qeit_get(queue);
- u32 cqe_flags = cqe->cqe_flags;
-
- return cqe_flags >> 7 == (queue->toggle_state & 1);
+ return ipz_qeit_is_valid(queue) ? ipz_qeit_get_inc(queue) : NULL;
}
/*
-
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