qat: don't mess with ->d_name

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

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Link: https://lore.kernel.org/r/20250112080705.141166-15-viro@zeniv.linux.org.uk
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/crypto/intel/qat/qat_common/adf_tl_debugfs.c b/drivers/crypto/intel/qat/qat_common/adf_tl_debugfs.c
index c8241f5a0a26ee996525a0038a5d74b3e15ec094..f20ae7e35a0dc260b2b24783d377ad3ee132c255 100644 (file)
--- a/drivers/crypto/intel/qat/qat_common/adf_tl_debugfs.c
+++ b/drivers/crypto/intel/qat/qat_common/adf_tl_debugfs.c
@@ -473,22 +473,6 @@ unlock_and_exit:
 }
 DEFINE_SHOW_STORE_ATTRIBUTE(tl_control);
 
-static int get_rp_index_from_file(const struct file *f, u8 *rp_id, u8 rp_num)
-{
-       char alpha;
-       u8 index;
-       int ret;
-
-       ret = sscanf(f->f_path.dentry->d_name.name, ADF_TL_RP_REGS_FNAME, &alpha);
-       if (ret != 1)
-               return -EINVAL;
-
-       index = ADF_TL_DBG_RP_INDEX_ALPHA(alpha);
-       *rp_id = index;
-
-       return 0;
-}
-
 static int adf_tl_dbg_change_rp_index(struct adf_accel_dev *accel_dev,
                                      unsigned int new_rp_num,
                                      unsigned int rp_regs_index)
@@ -611,18 +595,11 @@ static int tl_rp_data_show(struct seq_file *s, void *unused)
 {
        struct adf_accel_dev *accel_dev = s->private;
        u8 rp_regs_index;
-       u8 max_rp;
-       int ret;
 
        if (!accel_dev)
                return -EINVAL;
 
-       max_rp = GET_TL_DATA(accel_dev).max_rp;
-       ret = get_rp_index_from_file(s->file, &rp_regs_index, max_rp);
-       if (ret) {
-               dev_dbg(&GET_DEV(accel_dev), "invalid RP data file name\n");
-               return ret;
-       }
+       rp_regs_index = debugfs_get_aux_num(s->file);
 
        return tl_print_rp_data(accel_dev, s, rp_regs_index);
 }
@@ -635,7 +612,6 @@ static ssize_t tl_rp_data_write(struct file *file, const char __user *userbuf,
        struct adf_telemetry *telemetry;
        unsigned int new_rp_num;
        u8 rp_regs_index;
-       u8 max_rp;
        int ret;
 
        accel_dev = seq_f->private;
@@ -643,15 +619,10 @@ static ssize_t tl_rp_data_write(struct file *file, const char __user *userbuf,
                return -EINVAL;
 
        telemetry = accel_dev->telemetry;
-       max_rp = GET_TL_DATA(accel_dev).max_rp;
 
        mutex_lock(&telemetry->wr_lock);
 
-       ret = get_rp_index_from_file(file, &rp_regs_index, max_rp);
-       if (ret) {
-               dev_dbg(&GET_DEV(accel_dev), "invalid RP data file name\n");
-               goto unlock_and_exit;
-       }
+       rp_regs_index = debugfs_get_aux_num(file);
 
        ret = kstrtou32_from_user(userbuf, count, 10, &new_rp_num);
        if (ret)
@@ -689,7 +660,8 @@ void adf_tl_dbgfs_add(struct adf_accel_dev *accel_dev)
        for (i = 0; i < max_rp; i++) {
                snprintf(name, sizeof(name), ADF_TL_RP_REGS_FNAME,
                         ADF_TL_DBG_RP_ALPHA_INDEX(i));
-               debugfs_create_file(name, 0644, dir, accel_dev, &tl_rp_data_fops);
+               debugfs_create_file_aux_num(name, 0644, dir, accel_dev, i,
+                                           &tl_rp_data_fops);
        }
 }