From: Anders Blomdell <anders.blomdell@domain.hid>
To: xenomai@xenomai.org
Subject: [Xenomai-core] [PATCH] Fix to RTDM open problems
Date: Fri, 27 Jan 2006 11:29:23 +0100 [thread overview]
Message-ID: <43D9F603.8000505@domain.hid> (raw)
When RTDM is exposed to code like this:
device1 = rt_dev_open("some_device", O_RDWR);
device2 = rt_dev_open("some_device", O_RDWR);
I get a SEGFAULT, which I attribute to a missing assignment to context_ptr in
the case when the device is already busy, the lack of this assignment leads to a
segfault in cleanup_instance.
--- xenomai-2.1-rc2/ksrc/skins/rtdm/core.c~ 2006-01-07 18:08:34.000000000 +0100
+++ xenomai-2.1-rc2/ksrc/skins/rtdm/core.c 2006-01-27 11:14:43.000000000 +0100
@@ -136,6 +136,8 @@
if (context->device) {
xnlock_put_irqrestore(&rt_dev_lock, s);
+
+ *context_ptr = NULL;
return -EBUSY;
}
context->device = device;
next reply other threads:[~2006-01-27 10:29 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-01-27 10:29 Anders Blomdell [this message]
2006-01-27 12:03 ` [Xenomai-core] [PATCH] Fix to RTDM open problems Jan Kiszka
2006-01-27 12:48 ` Luotao Fu
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