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From 7474fe190f770e064a5ce5e939bd713ce2aa1de5 Mon Sep 17 00:00:00 2001
From: Jae Hyun Yoo <jae.hyun.yoo@intel.com>
Date: Wed, 3 Feb 2021 16:18:37 -0800
Subject: [PATCH] peci: Add debug printing to check caller PID
This commit adds debug printing out to check caller PID for traffic
profiling.
The printing can be enabled by this command:
echo -n 'file drivers/peci/peci-core.c line 218 +p' > /sys/kernel/debug/dynamic_debug/control
echo '8' > /proc/sys/kernel/printk
Signed-off-by: Jae Hyun Yoo <jae.hyun.yoo@intel.com>
---
drivers/peci/peci-core.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/peci/peci-core.c b/drivers/peci/peci-core.c
index 10375e6087a5..02c8502fd846 100644
--- a/drivers/peci/peci-core.c
+++ b/drivers/peci/peci-core.c
@@ -194,6 +194,7 @@ static int __peci_xfer(struct peci_adapter *adapter, struct peci_xfer_msg *msg,
bool do_retry, bool has_aw_fcs)
{
uint interval_us = PECI_DEV_RETRY_INTERVAL_MIN_USEC;
+ char task_name[TASK_COMM_LEN];
ulong timeout = jiffies;
u8 aw_fcs;
int ret;
@@ -214,6 +215,10 @@ static int __peci_xfer(struct peci_adapter *adapter, struct peci_xfer_msg *msg,
}
}
+ get_task_comm(task_name, current);
+ dev_dbg(&adapter->dev, "%s is called by %s(%d) through %s\n",
+ __func__, task_name, current->pid, adapter->name);
+
/*
* For some commands, the PECI originator may need to retry a command if
* the processor PECI client responds with a 0x8x completion code. In
--
2.17.1
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