linux-kernel - Re: [PATCH v9] bus: mhi: host: Add tracing support

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Message-ID: <20240130182654.GD4218@thinkpad>
Date: Tue, 30 Jan 2024 23:56:54 +0530
From: Manivannan Sadhasivam <mani@...nel.org>
To: Steven Rostedt <rostedt@...dmis.org>
Cc: Krishna chaitanya chundru <quic_krichai@...cinc.com>,
	Masami Hiramatsu <mhiramat@...nel.org>,
	linux-kernel@...r.kernel.org, mhi@...ts.linux.dev,
	linux-arm-msm@...r.kernel.org, linux-trace-kernel@...r.kernel.org,
	quic_vbadigan@...cinc.com, quic_ramkri@...cinc.com,
	quic_nitegupt@...cinc.com, quic_skananth@...cinc.com,
	quic_parass@...cinc.com
Subject: Re: [PATCH v9] bus: mhi: host: Add tracing support

On Tue, Jan 30, 2024 at 09:22:52AM -0500, Steven Rostedt wrote:
> On Tue, 30 Jan 2024 13:41:52 +0530
> Manivannan Sadhasivam <mani@...nel.org> wrote:
> 
> > So same trace will get printed for both mhi_channel_command_start() and
> > mhi_channel_command_end()?
> 
> The trace output will also include the tracepoint name. That is, it will
> have the same content but will be preceded with:
> 
>   mhi_channel_command_start: ...
>   mhi_channel_command_end: ...
> 

Yes, but the message will be the same:

mhi_channel_command_start: chan%d: Updating state to: 
mhi_channel_command_end: chan%d: Updating state to:

Either only one of the trace should be present or the second one should print,
"mhi_channel_command_end: chan%d: Updated state to:"

- Mani

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