arm_scmi: don't mess with ->d_parent->d_name

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Link: https://lore.kernel.org/r/20250112080705.141166-18-viro@zeniv.linux.org.uk
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/firmware/arm_scmi/raw_mode.c b/drivers/firmware/arm_scmi/raw_mode.c
index 9e89a6a763daf540424d2b897bb356b2791898bc..7cc0d616b8de781fb4de05058bddaa7bb76a9d2f 100644 (file)
--- a/drivers/firmware/arm_scmi/raw_mode.c
+++ b/drivers/firmware/arm_scmi/raw_mode.c
@@ -886,10 +886,8 @@ static __poll_t scmi_dbg_raw_mode_message_poll(struct file *filp,
 
 static int scmi_dbg_raw_mode_open(struct inode *inode, struct file *filp)
 {
-       u8 id;
        struct scmi_raw_mode_info *raw;
        struct scmi_dbg_raw_data *rd;
-       const char *id_str = filp->f_path.dentry->d_parent->d_name.name;
 
        if (!inode->i_private)
                return -ENODEV;
@@ -915,8 +913,8 @@ static int scmi_dbg_raw_mode_open(struct inode *inode, struct file *filp)
        }
 
        /* Grab channel ID from debugfs entry naming if any */
-       if (!kstrtou8(id_str, 16, &id))
-               rd->chan_id = id;
+       /* not set - reassing 0 we already had after kzalloc() */
+       rd->chan_id = debugfs_get_aux_num(filp);
 
        rd->raw = raw;
        filp->private_data = rd;
@@ -1225,10 +1223,12 @@ void *scmi_raw_mode_init(const struct scmi_handle *handle,
                        snprintf(cdir, 8, "0x%02X", channels[i]);
                        chd = debugfs_create_dir(cdir, top_chans);
 
-                       debugfs_create_file("message", 0600, chd, raw,
+                       debugfs_create_file_aux_num("message", 0600, chd,
+                                           raw, channels[i],
                                            &scmi_dbg_raw_mode_message_fops);
 
-                       debugfs_create_file("message_async", 0600, chd, raw,
+                       debugfs_create_file_aux_num("message_async", 0600, chd,
+                                           raw, channels[i],
                                            &scmi_dbg_raw_mode_message_async_fops);
                }
        }