linux-kernel - Re: [PATCH 13/26 v5] tracing: Fix return value of ftrace_raw_output

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Message-ID: <20141118142421.GH23958@pathway.suse.cz>
Date:	Tue, 18 Nov 2014 15:24:21 +0100
From:	Petr Mladek <pmladek@...e.cz>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Jiri Kosina <jkosina@...e.cz>
Subject: Re: [PATCH 13/26 v5] tracing: Fix return value of
 ftrace_raw_output_prep()

On Fri 2014-11-14 23:59:00, Steven Rostedt wrote:
> From: "Steven Rostedt (Red Hat)" <rostedt@...dmis.org>
> 
> If the trace_seq of ftrace_raw_output_prep() is full this function
> returns TRACE_TYPE_PARTIAL_LINE, otherwise it returns zero.
> 
> The problem is that TRACE_TYPE_PARTIAL_LINE happens to be zero!
> 
> The thing is, the caller of ftrace_raw_output_prep() expects a
> success to be zero. Change that to expect it to be
> TRACE_TYPE_HANDLED.
> 
> Link: http://lkml.kernel.org/r/20141114112522.GA2988@dhcp128.suse.cz
> 
> Reminded-by: Petr Mladek <pmladek@...e.cz>
> Signed-off-by: Steven Rostedt <rostedt@...dmis.org>

Reviewed-by: Petr Mladek <pmladek@...e.cz>

Best Regards,
Petr
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