diff --git a/drivers/misc/sdma-dae/sdma_dbg.c b/drivers/misc/sdma-dae/sdma_dbg.c
index fc25daf991d76558facd800ed59f5e429bc9f54b..eb090c6b40f797158859c831781c74032f401452 100644
--- a/drivers/misc/sdma-dae/sdma_dbg.c
+++ b/drivers/misc/sdma-dae/sdma_dbg.c
@@ -95,7 +95,7 @@ static int sdma_debugfs_stats_show(struct seq_file *f, void *data SDMA_UNUSED)
 		if (!dev) {
 			seq_puts(f, "sdma_devices already released!\n");
 			spin_unlock(&dbg_g_info.core_dev->device_lock);
-			return -ENXIO;
+			return 0;
 		}
 		chn_num = sdma_chn_info(f, dev);
 		exclusive_chn_used_nr = dev->nr_channel_used;
@@ -249,7 +249,7 @@ static int sdma_debugfs_error_show(struct seq_file *f, void *data SDMA_UNUSED)
 		if (!dev) {
 			seq_puts(f, "sdma_devices already released!\n");
 			spin_unlock(&dbg_g_info.core_dev->device_lock);
-			return -ENXIO;
+			return 0;
 		}
 		chn_num = sdma_chn_info(f, dev);
 		total_err_cnt = 0;
@@ -404,7 +404,7 @@ static int sdma_debugfs_channels_show(struct seq_file *f, void *data SDMA_UNUSED
 			if (!sdev) {
 				seq_puts(f, "sdma_devices already released!\n");
 				spin_unlock(&dbg_g_info.core_dev->device_lock);
-				return -ENXIO;
+				return 0;
 			}
 			chn_num = sdma_chn_info(f, sdev);
 			chn_idx = 0;
@@ -423,14 +423,14 @@ static int sdma_debugfs_channels_show(struct seq_file *f, void *data SDMA_UNUSED
 		if (dev_idx >= HISI_SDMA_MAX_DEVS ||
 		    chn_idx >= HISI_SDMA_DEFAULT_CHANNEL_NUM) {
 			seq_puts(f, "Unsupported device or channel!\n");
-			return -EINVAL;
+			return 0;
 		}
 		spin_lock(&dbg_g_info.core_dev->device_lock);
 		sdev = dbg_g_info.core_dev->sdma_devices[dev_idx];
 		if (!sdev) {
 			seq_puts(f, "sdma_devices already released!\n");
 			spin_unlock(&dbg_g_info.core_dev->device_lock);
-			return -ENXIO;
+			return 0;
 		}
 		chn_num = sdma_chn_info(f, sdev);
 		chn = sdev->channels + chn_idx;
@@ -441,7 +441,7 @@ static int sdma_debugfs_channels_show(struct seq_file *f, void *data SDMA_UNUSED
 		spin_unlock(&dbg_g_info.core_dev->device_lock);
 	} else {
 		seq_puts(f, "Unsupported debug mode!\n");
-		return -EINVAL;
+		return 0;
 	}
 
 	return 0;
@@ -477,9 +477,9 @@ int sdma_create_dbg_node(struct dentry *sdma_dbgfs_dir)
 	if (IS_ERR(entry))
 		return PTR_ERR(entry);
 
-	debugfs_create_u32("debug_mode", RW_R_R, sdma_dbgfs_dir, &debug_mode);
-	debugfs_create_u32("device_id", RW_R_R, sdma_dbgfs_dir, &device_id);
-	debugfs_create_u32("channel_id", RW_R_R, sdma_dbgfs_dir, &channel_id);
+	debugfs_create_u32("debug_mode", RW_RW_RW, sdma_dbgfs_dir, &debug_mode);
+	debugfs_create_u32("device_id", RW_RW_RW, sdma_dbgfs_dir, &device_id);
+	debugfs_create_u32("channel_id", RW_RW_RW, sdma_dbgfs_dir, &channel_id);
 	debug_mode = 0;
 	device_id = 0;
 	channel_id = 0;
diff --git a/drivers/misc/sdma-dae/sdma_hal.h b/drivers/misc/sdma-dae/sdma_hal.h
index 31027681a1f30ea5e4c5d5db544f352b404e2061..f734b20f3197f6e543e30cbb8966f741419ce9b8 100644
--- a/drivers/misc/sdma-dae/sdma_hal.h
+++ b/drivers/misc/sdma-dae/sdma_hal.h
@@ -13,6 +13,7 @@
 #include "sdma_reg.h"
 
 #define RW_R_R			0644
+#define RW_RW_RW		0666
 #define SDMA_IRQ_NUM_MAX	512
 #define ALIGN_NUM		1
 #define HISI_SDMA_HAL_HASH_BUCKETS_BITS 8
diff --git a/drivers/misc/sdma-dae/sdma_main.c b/drivers/misc/sdma-dae/sdma_main.c
index 5bd187738ba5218aa34580f8d7036cdad014c2de..a76aa653e4738df3afbce0a52787c279afcdbdec 100644
--- a/drivers/misc/sdma-dae/sdma_main.c
+++ b/drivers/misc/sdma-dae/sdma_main.c
@@ -507,6 +507,16 @@ static long sdma_create_debugfs(void)
 	return 0;
 }
 
+static char *sdma_devnode(struct device *dev, umode_t *mode)
+{
+	if (!mode)
+		return NULL;
+
+	*mode = RW_RW_RW;
+
+	return NULL;
+}
+
 static int __init sdma_driver_init(void)
 {
 	dev_t sdma_dev;
@@ -521,6 +531,7 @@ static int __init sdma_driver_init(void)
 		pr_err("class_create() failed for sdma_class: %ld\n", PTR_ERR(sdma_class));
 		goto destroy_ida;
 	}
+	sdma_class->devnode = sdma_devnode;
 	ret = alloc_chrdev_region(&sdma_dev, 0, HISI_SDMA_MAX_DEVS, "sdma");
 	if (ret < 0) {
 		pr_err("alloc_chrdev_region() failed for sdma\n");