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ksym_tracer: Report error when failed to re-register hbp 

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) */