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From: Krishna chaitanya chundru <quic_krichai@quicinc.com>
Date: Sun, 18 Feb 2024 14:13:39 +0530
Subject: [PATCH] bus: mhi: host: Change the trace string for the userspace
 tools mapping
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Message-ID: <20240218-ftrace_string-v1-1-27da85c1f844@quicinc.com>
To: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>,
        Steven Rostedt
	<rostedt@goodmis.org>
CC: <linux-kernel@vger.kernel.org>, <mhi@lists.linux.dev>,
        <linux-kernel@vger.kernel.org>, <linux-arm-msm@vger.kernel.org>,
        <linux-trace-kernel@vger.kernel.org>,
        <linux-trace-kernel@vger.kernel.org>, <quic_vbadigan@quicinc.com>,
        <quic_ramkri@quicinc.com>, <quic_nitegupt@quicinc.com>,
        <quic_skananth@quicinc.com>, <quic_parass@quicinc.com>,
        Krishna chaitanya chundru
	<quic_krichai@quicinc.com>

User space tools can't map strings if we use directly, as the string
address is internal to kernel.

So add trace point strings for the user space tools to map strings
properly.

Signed-off-by: Krishna chaitanya chundru <quic_krichai@quicinc.com>
---
 drivers/bus/mhi/host/main.c  | 4 ++--
 drivers/bus/mhi/host/trace.h | 2 ++
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/bus/mhi/host/main.c b/drivers/bus/mhi/host/main.c
index 2d38f6005da6..15d657af9b5b 100644
--- a/drivers/bus/mhi/host/main.c
+++ b/drivers/bus/mhi/host/main.c
@@ -1340,7 +1340,7 @@ static int mhi_update_channel_state(struct mhi_controller *mhi_cntrl,
 	enum mhi_cmd_type cmd = MHI_CMD_NOP;
 	int ret;
 
-	trace_mhi_channel_command_start(mhi_cntrl, mhi_chan, to_state, "Updating");
+	trace_mhi_channel_command_start(mhi_cntrl, mhi_chan, to_state, TPS("Updating"));
 	switch (to_state) {
 	case MHI_CH_STATE_TYPE_RESET:
 		write_lock_irq(&mhi_chan->lock);
@@ -1407,7 +1407,7 @@ static int mhi_update_channel_state(struct mhi_controller *mhi_cntrl,
 		write_unlock_irq(&mhi_chan->lock);
 	}
 
-	trace_mhi_channel_command_end(mhi_cntrl, mhi_chan, to_state, "Updated");
+	trace_mhi_channel_command_end(mhi_cntrl, mhi_chan, to_state, TPS("Updated"));
 exit_channel_update:
 	mhi_cntrl->runtime_put(mhi_cntrl);
 	mhi_device_put(mhi_cntrl->mhi_dev);
diff --git a/drivers/bus/mhi/host/trace.h b/drivers/bus/mhi/host/trace.h
index d12a98d44272..368515dcb22d 100644
--- a/drivers/bus/mhi/host/trace.h
+++ b/drivers/bus/mhi/host/trace.h
@@ -84,6 +84,8 @@ DEV_ST_TRANSITION_LIST
 #define dev_st_trans(a, b)		{ DEV_ST_TRANSITION_##a, b },
 #define dev_st_trans_end(a, b)		{ DEV_ST_TRANSITION_##a, b }
 
+#define TPS(x)	tracepoint_string(x)
+
 TRACE_EVENT(mhi_gen_tre,
 
 	TP_PROTO(struct mhi_controller *mhi_cntrl, struct mhi_chan *mhi_chan,

---
base-commit: ceeb64f41fe6a1eb9fc56d583983a81f8f3dd058
change-id: 20240218-ftrace_string-7677762aa63c

Best regards,
-- 
Krishna chaitanya chundru <quic_krichai@quicinc.com>