[PATCH 04/12] accel/habanalabs: print task name and request code upon ioctl failure

[Oded Gabbay]

From: Tomer Tayar <ttayar at habana.ai>

When an ioctl fails, it is useful to know what is the task command name
and the full ioctl request code, in addition to the task pid and the
ioctl number.
Add the additional information to the relevant debug error prints.

Signed-off-by: Tomer Tayar <ttayar at habana.ai>
Reviewed-by: Oded Gabbay <ogabbay at kernel.org>
Signed-off-by: Oded Gabbay <ogabbay at kernel.org>
---
 .../habanalabs/common/habanalabs_ioctl.c      | 24 +++++++++++++------
 1 file changed, 17 insertions(+), 7 deletions(-)

diff --git a/drivers/accel/habanalabs/common/habanalabs_ioctl.c b/drivers/accel/habanalabs/common/habanalabs_ioctl.c
index 6a45a92344e9..549b2518fae0 100644
--- a/drivers/accel/habanalabs/common/habanalabs_ioctl.c
+++ b/drivers/accel/habanalabs/common/habanalabs_ioctl.c
@@ -1194,9 +1194,13 @@ static long _hl_ioctl(struct file *filep, unsigned int cmd, unsigned long arg,
 		retcode = -EFAULT;
 
 out_err:
-	if (retcode)
-		dev_dbg_ratelimited(dev, "error in ioctl: pid=%d, cmd=0x%02x, nr=0x%02x\n",
-			  task_pid_nr(current), cmd, nr);
+	if (retcode) {
+		char task_comm[TASK_COMM_LEN];
+
+		dev_dbg_ratelimited(dev,
+				"error in ioctl: pid=%d, comm=\"%s\", cmd=%#010x, nr=%#04x\n",
+				task_pid_nr(current), get_task_comm(task_comm, current), cmd, nr);
+	}
 
 	if (kdata != stack_kdata)
 		kfree(kdata);
@@ -1219,8 +1223,11 @@ long hl_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
 	if ((nr >= HL_COMMAND_START) && (nr < HL_COMMAND_END)) {
 		ioctl = &hl_ioctls[nr];
 	} else {
-		dev_dbg_ratelimited(hdev->dev, "invalid ioctl: pid=%d, nr=0x%02x\n",
-			task_pid_nr(current), nr);
+		char task_comm[TASK_COMM_LEN];
+
+		dev_dbg_ratelimited(hdev->dev,
+				"invalid ioctl: pid=%d, comm=\"%s\", cmd=%#010x, nr=%#04x\n",
+				task_pid_nr(current), get_task_comm(task_comm, current), cmd, nr);
 		return -ENOTTY;
 	}
 
@@ -1242,8 +1249,11 @@ long hl_ioctl_control(struct file *filep, unsigned int cmd, unsigned long arg)
 	if (nr == _IOC_NR(HL_IOCTL_INFO)) {
 		ioctl = &hl_ioctls_control[nr];
 	} else {
-		dev_dbg_ratelimited(hdev->dev_ctrl, "invalid ioctl: pid=%d, nr=0x%02x\n",
-			task_pid_nr(current), nr);
+		char task_comm[TASK_COMM_LEN];
+
+		dev_dbg_ratelimited(hdev->dev_ctrl,
+				"invalid ioctl: pid=%d, comm=\"%s\", cmd=%#010x, nr=%#04x\n",
+				task_pid_nr(current), get_task_comm(task_comm, current), cmd, nr);
 		return -ENOTTY;
 	}
 
-- 
2.40.1