redonkable/alistair23-linux
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ksym_tracer: Report error when failed to re-register hbp

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When access type is changed, the hw break point will be
unregistered and then be registered again with new access
type. But the registration may fail, in this case, -errno
should be returned.

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Acked-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: "K.Prasad" <prasad@linux.vnet.ibm.com>
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: Steven Rostedt <rostedt@goodmis.org>
LKML-Reference: <4A52E314.7070004@cn.fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Li Zefan 2009-07-07 13:54:28 +08:00 committed by Ingo Molnar
parent 011ed56853
commit 0d109c8f70
1 changed files with 2 additions and 2 deletions
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4
kernel/trace/trace_ksym.c
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@ -302,13 +302,13 @@ static ssize_t ksym_trace_filter_write(struct file *file,
ret = count;
goto unlock_ret_path;
}
}
} else
ret = count;
ksym_filter_entry_count--;
hlist_del_rcu(&(entry->ksym_hlist));
synchronize_rcu();
kfree(entry->ksym_hbp);
kfree(entry);
ret = count;
goto err_ret;
} else {
/* Check for malformed request: (4) */