Adds a missing comment for xfer_lock spinlock in struct scmi_xfers_info.
The spinlock protects access to the xfer buffers and transfer allocation
mechanism, preventing race conditions in concurrent access scenarios.

Signed-off-by: Artem Shimko <artyom.shimko@gmail.com>
---
 drivers/firmware/arm_scmi/driver.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/firmware/arm_scmi/driver.c b/drivers/firmware/arm_scmi/driver.c
index bd56a877fdfc..6828392152f4 100644
--- a/drivers/firmware/arm_scmi/driver.c
+++ b/drivers/firmware/arm_scmi/driver.c
@@ -76,6 +76,7 @@ static struct dentry *scmi_top_dentry;
  */
 struct scmi_xfers_info {
 	unsigned long *xfer_alloc_table;
+	/* Protects access to the xfer buffers */
 	spinlock_t xfer_lock;
 	int max_msg;
 	struct hlist_head free_xfers;
-- 
2.43.0