Module: xenomai-rpm
Branch: for-upstream
Commit: 7b0bb509f6a9b5a0bad8e7ae7609d26e9d4e06c2
URL:
http://git.xenomai.org/?p=xenomai-rpm.git;a=commit;h=7b0bb509f6a9b5a0bad8e7ae7609d26e9d4e06c2
Author: Philippe Gerum <r...@xenomai.org>
Date: Wed Mar 24 14:39:28 2010 +0100
rtipc/bufp: prevent I/O waiters from missing a pulse
---
ksrc/drivers/ipc/bufp.c | 12 ++++++++----
1 files changed, 8 insertions(+), 4 deletions(-)
diff --git a/ksrc/drivers/ipc/bufp.c b/ksrc/drivers/ipc/bufp.c
index 88200ab..04b3209 100644
--- a/ksrc/drivers/ipc/bufp.c
+++ b/ksrc/drivers/ipc/bufp.c
@@ -273,10 +273,12 @@ redo:
wait.len = len;
wait.sk = sk;
rtipc_prepare_wait(&wait.wc);
- rtipc_leave_atomic(wait.lockctx);
+ /*
+ * Keep the nucleus lock across the wait call, so that
+ * we don't miss a pulse.
+ */
ret = rtdm_event_timedwait(&sk->i_event,
sk->rx_timeout, &toseq);
- rtipc_enter_atomic(wait.lockctx);
rtipc_finish_wait(&wait.wc, __bufp_cleanup_handler);
if (unlikely(ret))
@@ -504,10 +506,12 @@ redo:
wait.len = len;
wait.sk = rsk;
rtipc_prepare_wait(&wait.wc);
- rtipc_leave_atomic(wait.lockctx);
+ /*
+ * Keep the nucleus lock across the wait call, so that
+ * we don't miss a pulse.
+ */
ret = rtdm_event_timedwait(&rsk->o_event,
sk->tx_timeout, &toseq);
- rtipc_enter_atomic(wait.lockctx);
rtipc_finish_wait(&wait.wc, __bufp_cleanup_handler);
if (unlikely(ret))
break;
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