[PATCH v3 5/9] cxl/mbox: Remove dependency on cxl_mem_command for a debug msg

[alison.schofield@intel.com]

From: Alison Schofield <alison.schofield@intel.com>

In preparation for removing access to struct cxl_mem_command,
change this debug message to use cxl_mbox_cmd fields instead.
Retrieve the pretty command name from cxl_mbox_cmd using a new
opcode to command name helper.

Signed-off-by: Alison Schofield <alison.schofield@intel.com>
---
 drivers/cxl/core/mbox.c | 17 ++++++++++++++---
 1 file changed, 14 insertions(+), 3 deletions(-)

diff --git a/drivers/cxl/core/mbox.c b/drivers/cxl/core/mbox.c
index 205e671307c3..d6d582baa1ee 100644
--- a/drivers/cxl/core/mbox.c
+++ b/drivers/cxl/core/mbox.c
@@ -127,6 +127,17 @@ static struct cxl_mem_command *cxl_mem_find_command(u16 opcode)
 	return NULL;
 }
 
+static const char *cxl_mem_opcode_to_name(u16 opcode)
+{
+	struct cxl_mem_command *c;
+
+	c = cxl_mem_find_command(opcode);
+	if (c)
+		return cxl_command_names[c->info.id].name;
+
+	return NULL;
+}
+
 /**
  * cxl_mbox_send_cmd() - Send a mailbox command to a device.
  * @cxlds: The device data for the operation
@@ -450,9 +461,9 @@ static int handle_mailbox_cmd_from_user(struct cxl_dev_state *cxlds,
 	dev_dbg(dev,
 		"Submitting %s command for user\n"
 		"\topcode: %x\n"
-		"\tsize: %ub\n",
-		cxl_command_names[cmd->info.id].name, mbox_cmd.opcode,
-		cmd->info.size_in);
+		"\tsize: %zx\n",
+		cxl_mem_opcode_to_name(mbox_cmd.opcode),
+		mbox_cmd.opcode, mbox_cmd.size_in);
 
 	rc = cxlds->mbox_send(cxlds, &mbox_cmd);
 	if (rc)
-- 
2.31.1