mtu3: don't mess wiht ->d_iname

use debugfs_{create_file,get}_aux() instead.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Link: https://lore.kernel.org/r/20250112080705.141166-13-viro@zeniv.linux.org.uk
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/mtu3/mtu3_debugfs.c b/drivers/usb/mtu3/mtu3_debugfs.c
index f0de9985835313500ebcce6435dbdd5d0357f914..deeac2c8f58974c27edff65eb2975c01ba1501ac 100644 (file)
--- a/drivers/usb/mtu3/mtu3_debugfs.c
+++ b/drivers/usb/mtu3/mtu3_debugfs.c
@@ -256,16 +256,7 @@ static const struct mtu3_file_map mtu3_ep_files[] = {
 
 static int mtu3_ep_open(struct inode *inode, struct file *file)
 {
-       const char *file_name = file_dentry(file)->d_iname;
-       const struct mtu3_file_map *f_map;
-       int i;
-
-       for (i = 0; i < ARRAY_SIZE(mtu3_ep_files); i++) {
-               f_map = &mtu3_ep_files[i];
-
-               if (strcmp(f_map->name, file_name) == 0)
-                       break;
-       }
+       const struct mtu3_file_map *f_map = debugfs_get_aux(file);
 
        return single_open(file, f_map->show, inode->i_private);
 }
@@ -288,17 +279,8 @@ static const struct debugfs_reg32 mtu3_prb_regs[] = {
 
 static int mtu3_probe_show(struct seq_file *sf, void *unused)
 {
-       const char *file_name = file_dentry(sf->file)->d_iname;
        struct mtu3 *mtu = sf->private;
-       const struct debugfs_reg32 *regs;
-       int i;
-
-       for (i = 0; i < ARRAY_SIZE(mtu3_prb_regs); i++) {
-               regs = &mtu3_prb_regs[i];
-
-               if (strcmp(regs->name, file_name) == 0)
-                       break;
-       }
+       const struct debugfs_reg32 *regs = debugfs_get_aux(sf->file);
 
        seq_printf(sf, "0x%04x - 0x%08x\n", (u32)regs->offset,
                   mtu3_readl(mtu->ippc_base, (u32)regs->offset));
@@ -314,13 +296,11 @@ static int mtu3_probe_open(struct inode *inode, struct file *file)
 static ssize_t mtu3_probe_write(struct file *file, const char __user *ubuf,
                                size_t count, loff_t *ppos)
 {
-       const char *file_name = file_dentry(file)->d_iname;
        struct seq_file *sf = file->private_data;
        struct mtu3 *mtu = sf->private;
-       const struct debugfs_reg32 *regs;
+       const struct debugfs_reg32 *regs = debugfs_get_aux(file);
        char buf[32];
        u32 val;
-       int i;
 
        if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
                return -EFAULT;
@@ -328,12 +308,6 @@ static ssize_t mtu3_probe_write(struct file *file, const char __user *ubuf,
        if (kstrtou32(buf, 0, &val))
                return -EINVAL;
 
-       for (i = 0; i < ARRAY_SIZE(mtu3_prb_regs); i++) {
-               regs = &mtu3_prb_regs[i];
-
-               if (strcmp(regs->name, file_name) == 0)
-                       break;
-       }
        mtu3_writel(mtu->ippc_base, (u32)regs->offset, val);
 
        return count;
@@ -358,8 +332,8 @@ static void mtu3_debugfs_create_prb_files(struct mtu3 *mtu)
 
        for (i = 0; i < ARRAY_SIZE(mtu3_prb_regs); i++) {
                regs = &mtu3_prb_regs[i];
-               debugfs_create_file(regs->name, 0644, dir_prb,
-                                   mtu, &mtu3_probe_fops);
+               debugfs_create_file_aux(regs->name, 0644, dir_prb,
+                                   mtu, regs, &mtu3_probe_fops);
        }
 
        mtu3_debugfs_regset(mtu, mtu->ippc_base, mtu3_prb_regs,
@@ -379,8 +353,8 @@ static void mtu3_debugfs_create_ep_dir(struct mtu3_ep *mep,
        for (i = 0; i < ARRAY_SIZE(mtu3_ep_files); i++) {
                files = &mtu3_ep_files[i];
 
-               debugfs_create_file(files->name, 0444, dir_ep,
-                                   mep, &mtu3_ep_fops);
+               debugfs_create_file_aux(files->name, 0444, dir_ep,
+                                   mep, files, &mtu3_ep_fops);
        }
 }