diff options
Diffstat (limited to 'meta-openbmc-mods/meta-common/recipes-kernel/linux/linux-aspeed/0001-peci-Add-debug-printing-to-check-caller-PID.patch')
| -rw-r--r-- | meta-openbmc-mods/meta-common/recipes-kernel/linux/linux-aspeed/0001-peci-Add-debug-printing-to-check-caller-PID.patch | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/meta-openbmc-mods/meta-common/recipes-kernel/linux/linux-aspeed/0001-peci-Add-debug-printing-to-check-caller-PID.patch b/meta-openbmc-mods/meta-common/recipes-kernel/linux/linux-aspeed/0001-peci-Add-debug-printing-to-check-caller-PID.patch new file mode 100644 index 000000000..0a7d4007f --- /dev/null +++ b/meta-openbmc-mods/meta-common/recipes-kernel/linux/linux-aspeed/0001-peci-Add-debug-printing-to-check-caller-PID.patch @@ -0,0 +1,43 @@ +From 63d053b12cc7ca63a668872ce70e6592fe1dd7e5 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 0fc2f246ada8..0fdb26a15150 100644 +--- a/drivers/peci/peci-core.c ++++ b/drivers/peci/peci-core.c +@@ -193,6 +193,7 @@ static int __peci_xfer(struct peci_adapter *adapter, struct peci_xfer_msg *msg, + bool do_retry, bool has_aw_fcs) + { + uint interval_ms = PECI_DEV_RETRY_INTERVAL_MIN_MSEC; ++ char task_name[TASK_COMM_LEN]; + ulong timeout = jiffies; + u8 aw_fcs; + int ret; +@@ -213,6 +214,10 @@ 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 + |