diff --git a/drivers/usb/gadget/function/f_fs.c b/drivers/usb/gadget/function/f_fs.c
index a4051c8..df67ab5 100644
--- a/drivers/usb/gadget/function/f_fs.c
+++ b/drivers/usb/gadget/function/f_fs.c
@@ -317,12 +317,12 @@ static int __ffs_ep0_queue_wait(struct ffs_data *ffs, char *data, size_t len)
 static int __ffs_ep0_stall(struct ffs_data *ffs)
 {
 	if (ffs->ev.can_stall) {
-		pr_vdebug("ep0 stall\n");
+		pr_vdebug("%s: ep0 stall\n", ffs->dev_name);
 		usb_ep_set_halt(ffs->gadget->ep0);
 		ffs->setup_state = FFS_NO_SETUP;
 		return -EL2HLT;
 	} else {
-		pr_debug("bogus ep0 stall!\n");
+		pr_debug("%s: bogus ep0 stall!\n", ffs->dev_name);
 		return -ESRCH;
 	}
 }
@@ -361,7 +361,7 @@ static ssize_t ffs_ep0_write(struct file *file, const char __user *buf,
 
 		/* Handle data */
 		if (ffs->state == FFS_READ_DESCRIPTORS) {
-			pr_info("read descriptors\n");
+			pr_info("%s: read descriptors\n", ffs->dev_name);
 			ret = __ffs_data_got_descs(ffs, data, len);
 			if (ret < 0)
 				break;
@@ -369,7 +369,7 @@ static ssize_t ffs_ep0_write(struct file *file, const char __user *buf,
 			ffs->state = FFS_READ_STRINGS;
 			ret = len;
 		} else {
-			pr_info("read strings\n");
+			pr_info("%s: read strings\n", ffs->dev_name);
 			ret = __ffs_data_got_strings(ffs, data, len);
 			if (ret < 0)
 				break;
@@ -749,9 +749,9 @@ static ssize_t ffs_copy_to_iter(struct ffs_data *ffs, void *data, int data_len,
 	 * aio_read(2) etc. system calls.  Writing data to an IN endpoint is not
 	 * affected.
 	 */
-	pr_err("functionfs read size %d > requested size %zd, dropping excess data. "
+	pr_err("%s: functionfs read size %d > requested size %zd, dropping excess data. "
 	       "Align read buffer size to max packet size to avoid the problem.\n",
-	       data_len, ret);
+	       ffs->dev_name, data_len, ret);
 
 	return ret;
 }
@@ -911,8 +911,8 @@ static ssize_t __ffs_epfile_read_data(struct ffs_epfile *epfile,
 		return -EFAULT;
 
 	/* See ffs_copy_to_iter for more context. */
-	pr_warn("functionfs read size %d > requested size %zd, splitting request into multiple reads.",
-		data_len, ret);
+	pr_warn("%s: functionfs read size %d > requested size %zd, splitting request into multiple reads.",
+		epfile->ffs->dev_name, data_len, ret);
 
 	data_len -= ret;
 	buf = kmalloc(struct_size(buf, storage, data_len), GFP_KERNEL);
@@ -1043,7 +1043,7 @@ static ssize_t ffs_epfile_io(struct file *file, struct ffs_io_data *io_data)
 		 * For such reason, we're adding this redundant sanity check
 		 * here.
 		 */
-		WARN(1, "%s: data_len == -EINVAL\n", __func__);
+		WARN(1, "%s: %s(): data_len == -EINVAL\n", epfile->ffs->dev_name, __func__);
 		ret = -EINVAL;
 	} else if (!io_data->aio) {
 		bool interrupted = false;
@@ -1665,7 +1665,7 @@ static void ffs_data_opened(struct ffs_data *ffs)
 static void ffs_data_put(struct ffs_data *ffs)
 {
 	if (refcount_dec_and_test(&ffs->ref)) {
-		pr_info("%s(): freeing\n", __func__);
+		pr_info("%s: %s(): freeing\n", ffs->dev_name, __func__);
 		ffs_data_clear(ffs);
 		ffs_release_dev(ffs->private_data);
 		BUG_ON(waitqueue_active(&ffs->ev.waitq) ||
@@ -1942,8 +1942,8 @@ static int ffs_func_eps_enable(struct ffs_function *func)
 
 		ret = config_ep_by_speed(func->gadget, &func->function, ep->ep);
 		if (ret) {
-			pr_err("%s: config_ep_by_speed(%s) returned %d\n",
-					__func__, ep->ep->name, ret);
+			pr_err("%s: %s(): config_ep_by_speed(%s) returned %d\n",
+					ffs->dev_name, __func__, ep->ep->name, ret);
 			break;
 		}
 
@@ -2003,14 +2003,14 @@ static int __must_check ffs_do_single_desc(struct ffs_data *ffs, char *data, uns
 
 	/* At least two bytes are required: length and type */
 	if (len < 2) {
-		pr_vdebug("descriptor too short\n");
+		pr_vdebug("%s: descriptor too short\n", ffs->dev_name);
 		return -EINVAL;
 	}
 
 	/* If we have at least as many bytes as the descriptor takes? */
 	length = _ds->bLength;
 	if (len < length) {
-		pr_vdebug("descriptor longer then available data\n");
+		pr_vdebug("%s: descriptor longer then available data\n", ffs->dev_name);
 		return -EINVAL;
 	}
 
@@ -2018,15 +2018,15 @@ static int __must_check ffs_do_single_desc(struct ffs_data *ffs, char *data, uns
 #define __entity_check_STRING(val)     (val)
 #define __entity_check_ENDPOINT(val)   ((val) & USB_ENDPOINT_NUMBER_MASK)
 #define __entity(type, val) do {					\
-		pr_vdebug("entity " #type "(%02x)\n", (val));		\
+		pr_vdebug("%s: entity " #type "(%02x)\n", ffs->dev_name, (val));	\
 		if (!__entity_check_ ##type(val)) {			\
-			pr_vdebug("invalid entity's value\n");		\
+			pr_vdebug("%s: invalid entity's value\n", ffs->dev_name);	\
 			return -EINVAL;					\
 		}							\
-		ret = entity(ffs, FFS_ ##type, &val, _ds, priv);		\
+		ret = entity(ffs, FFS_ ##type, &val, _ds, priv);	\
 		if (ret < 0) {						\
-			pr_debug("entity " #type "(%02x); ret = %d\n",	\
-				 (val), ret);				\
+			pr_debug("%s: entity " #type "(%02x); ret = %d\n",	\
+				 ffs->dev_name, (val), ret);		\
 			return ret;					\
 		}							\
 	} while (0)
@@ -2038,13 +2038,13 @@ static int __must_check ffs_do_single_desc(struct ffs_data *ffs, char *data, uns
 	case USB_DT_STRING:
 	case USB_DT_DEVICE_QUALIFIER:
 		/* function can't have any of those */
-		pr_vdebug("descriptor reserved for gadget: %d\n",
-		      _ds->bDescriptorType);
+		pr_vdebug("%s: descriptor reserved for gadget: %d\n",
+		      ffs->dev_name, _ds->bDescriptorType);
 		return -EINVAL;
 
 	case USB_DT_INTERFACE: {
 		struct usb_interface_descriptor *ds = (void *)_ds;
-		pr_vdebug("interface descriptor\n");
+		pr_vdebug("%s: interface descriptor\n", ffs->dev_name);
 		if (length != sizeof *ds)
 			goto inv_length;
 
@@ -2057,7 +2057,7 @@ static int __must_check ffs_do_single_desc(struct ffs_data *ffs, char *data, uns
 
 	case USB_DT_ENDPOINT: {
 		struct usb_endpoint_descriptor *ds = (void *)_ds;
-		pr_vdebug("endpoint descriptor\n");
+		pr_vdebug("%s: endpoint descriptor\n", ffs->dev_name);
 		if (length != USB_DT_ENDPOINT_SIZE &&
 		    length != USB_DT_ENDPOINT_AUDIO_SIZE)
 			goto inv_length;
@@ -2067,18 +2067,18 @@ static int __must_check ffs_do_single_desc(struct ffs_data *ffs, char *data, uns
 
 	case USB_TYPE_CLASS | 0x01:
 		if (*current_class == USB_INTERFACE_CLASS_HID) {
-			pr_vdebug("hid descriptor\n");
+			pr_vdebug("%s: hid descriptor\n", ffs->dev_name);
 			if (length != sizeof(struct hid_descriptor))
 				goto inv_length;
 			break;
 		} else if (*current_class == USB_INTERFACE_CLASS_CCID) {
-			pr_vdebug("ccid descriptor\n");
+			pr_vdebug("%s: ccid descriptor\n", ffs->dev_name);
 			if (length != sizeof(struct ccid_descriptor))
 				goto inv_length;
 			break;
 		} else {
-			pr_vdebug("unknown descriptor: %d for class %d\n",
-			      _ds->bDescriptorType, *current_class);
+			pr_vdebug("%s: unknown descriptor: %d for class %d\n",
+			      ffs->dev_name, _ds->bDescriptorType, *current_class);
 			return -EINVAL;
 		}
 
@@ -2089,7 +2089,7 @@ static int __must_check ffs_do_single_desc(struct ffs_data *ffs, char *data, uns
 
 	case USB_DT_INTERFACE_ASSOCIATION: {
 		struct usb_interface_assoc_descriptor *ds = (void *)_ds;
-		pr_vdebug("interface association descriptor\n");
+		pr_vdebug("%s: interface association descriptor\n", ffs->dev_name);
 		if (length != sizeof *ds)
 			goto inv_length;
 		if (ds->iFunction)
@@ -2098,7 +2098,7 @@ static int __must_check ffs_do_single_desc(struct ffs_data *ffs, char *data, uns
 		break;
 
 	case USB_DT_SS_ENDPOINT_COMP:
-		pr_vdebug("EP SS companion descriptor\n");
+		pr_vdebug("%s: EP SS companion descriptor\n", ffs->dev_name);
 		if (length != sizeof(struct usb_ss_ep_comp_descriptor))
 			goto inv_length;
 		break;
@@ -2109,17 +2109,18 @@ static int __must_check ffs_do_single_desc(struct ffs_data *ffs, char *data, uns
 	case USB_DT_SECURITY:
 	case USB_DT_CS_RADIO_CONTROL:
 		/* TODO */
-		pr_vdebug("unimplemented descriptor: %d\n", _ds->bDescriptorType);
+		pr_vdebug("%s: unimplemented descriptor: %d\n", ffs->dev_name,
+			_ds->bDescriptorType);
 		return -EINVAL;
 
 	default:
 		/* We should never be here */
-		pr_vdebug("unknown descriptor: %d\n", _ds->bDescriptorType);
+		pr_vdebug("%s: unknown descriptor: %d\n", ffs->dev_name, _ds->bDescriptorType);
 		return -EINVAL;
 
 inv_length:
-		pr_vdebug("invalid length: %d (descriptor %d)\n",
-			  _ds->bLength, _ds->bDescriptorType);
+		pr_vdebug("%s: invalid length: %d (descriptor %d)\n",
+			  ffs->dev_name, _ds->bLength, _ds->bDescriptorType);
 		return -EINVAL;
 	}
 
@@ -2148,8 +2149,8 @@ static int __must_check ffs_do_descs(struct ffs_data *ffs, unsigned count, char
 		/* Record "descriptor" entity */
 		ret = entity(ffs, FFS_DESCRIPTOR, (u8 *)num, (void *)data, priv);
 		if (ret < 0) {
-			pr_debug("entity DESCRIPTOR(%02lx); ret = %d\n",
-				 num, ret);
+			pr_debug("%s: entity DESCRIPTOR(%02lx); ret = %d\n",
+				 ffs->dev_name, num, ret);
 			return ret;
 		}
 
@@ -2159,7 +2160,7 @@ static int __must_check ffs_do_descs(struct ffs_data *ffs, unsigned count, char
 		ret = ffs_do_single_desc(ffs, data, len, entity, priv,
 			&current_class);
 		if (ret < 0) {
-			pr_debug("%s returns %d\n", __func__, ret);
+			pr_debug("%s: %s(): returns %d\n", ffs->dev_name, __func__, ret);
 			return ret;
 		}
 
@@ -2224,11 +2225,12 @@ static int __ffs_do_os_desc_header(struct ffs_data *ffs, enum ffs_os_desc_type *
 	u16 w_index = le16_to_cpu(desc->wIndex);
 
 	if (bcd_version == 0x1) {
-		pr_warn("bcdVersion must be 0x0100, stored in Little Endian order. "
-			"Userspace driver should be fixed, accepting 0x0001 for compatibility.\n");
+		pr_warn("%s: bcdVersion must be 0x0100, stored in Little Endian order. "
+			"Userspace driver should be fixed, accepting 0x0001 for compatibility.\n",
+			ffs->dev_name);
 	} else if (bcd_version != 0x100) {
-		pr_vdebug("unsupported os descriptors version: 0x%x\n",
-			  bcd_version);
+		pr_vdebug("%s: unsupported os descriptors version: 0x%x\n",
+			  ffs->dev_name, bcd_version);
 		return -EINVAL;
 	}
 	switch (w_index) {
@@ -2239,7 +2241,7 @@ static int __ffs_do_os_desc_header(struct ffs_data *ffs, enum ffs_os_desc_type *
 		*next_type = FFS_OS_DESC_EXT_PROP;
 		break;
 	default:
-		pr_vdebug("unsupported os descriptor type: %d", w_index);
+		pr_vdebug("%s: unsupported os descriptor type: %d", ffs->dev_name, w_index);
 		return -EINVAL;
 	}
 
@@ -2264,7 +2266,7 @@ static int __must_check ffs_do_single_os_desc(struct ffs_data *ffs, char *data,
 	while (feature_count--) {
 		ret = entity(ffs, type, h, data, len, priv);
 		if (ret < 0) {
-			pr_debug("bad OS descriptor, type: %d\n", type);
+			pr_debug("%s: bad OS descriptor, type: %d\n", ffs->dev_name, type);
 			return ret;
 		}
 		data += ret;
@@ -2302,8 +2304,8 @@ static int __must_check ffs_do_os_descs(struct ffs_data *ffs, unsigned count,
 
 		ret = __ffs_do_os_desc_header(ffs, &type, desc);
 		if (ret < 0) {
-			pr_debug("entity OS_DESCRIPTOR(%02lx); ret = %d\n",
-				 num, ret);
+			pr_debug("%s: entity OS_DESCRIPTOR(%02lx); ret = %d\n",
+				 ffs->dev_name, num, ret);
 			return ret;
 		}
 		/*
@@ -2323,7 +2325,7 @@ static int __must_check ffs_do_os_descs(struct ffs_data *ffs, unsigned count,
 		ret = ffs_do_single_os_desc(ffs, data, len, type,
 					    feature_count, entity, priv, desc);
 		if (ret < 0) {
-			pr_debug("%s returns %d\n", __func__, ret);
+			pr_debug("%s: %s() returns %d\n", ffs->dev_name, __func__, ret);
 			return ret;
 		}
 
@@ -2357,7 +2359,7 @@ static int __ffs_data_do_os_desc(struct ffs_data *ffs, enum ffs_os_desc_type typ
 			 * values.  We fix it here to avoid returning EINVAL
 			 * in response to values we used to accept.
 			 */
-			pr_debug("usb_ext_compat_desc::Reserved1 forced to 1\n");
+			pr_debug("%s: usb_ext_compat_desc::Reserved1 forced to 1\n", ffs->dev_name);
 			d->Reserved1 = 1;
 		}
 		for (i = 0; i < ARRAY_SIZE(d->Reserved2); ++i)
@@ -2380,20 +2382,20 @@ static int __ffs_data_do_os_desc(struct ffs_data *ffs, enum ffs_os_desc_type typ
 		type = le32_to_cpu(d->dwPropertyDataType);
 		if (type < USB_EXT_PROP_UNICODE ||
 		    type > USB_EXT_PROP_UNICODE_MULTI) {
-			pr_vdebug("unsupported os descriptor property type: %d",
-				  type);
+			pr_vdebug("%s: unsupported os descriptor property type: %d",
+				  ffs->dev_name, type);
 			return -EINVAL;
 		}
 		pnl = le16_to_cpu(d->wPropertyNameLength);
 		if (length < 14 + pnl) {
-			pr_vdebug("invalid os descriptor length: %d pnl:%d (descriptor %d)\n",
-				  length, pnl, type);
+			pr_vdebug("%s: invalid os descriptor length: %d pnl:%d (%d)\n",
+				  ffs->dev_name, length, pnl, type);
 			return -EINVAL;
 		}
 		pdl = le32_to_cpu(*(__le32 *)((u8 *)data + 10 + pnl));
 		if (length != 14 + pnl + pdl) {
-			pr_vdebug("invalid os descriptor length: %d pnl:%d pdl:%d (descriptor %d)\n",
-				  length, pnl, pdl, type);
+			pr_vdebug("%s: invalid os descriptor length: %d pnl:%d pdl:%d (%d)\n",
+				ffs->dev_name, length, pnl, pdl, type);
 			return -EINVAL;
 		}
 		++ffs->ms_os_descs_ext_prop_count;
@@ -2403,7 +2405,7 @@ static int __ffs_data_do_os_desc(struct ffs_data *ffs, enum ffs_os_desc_type typ
 	}
 		break;
 	default:
-		pr_vdebug("unknown descriptor: %d\n", type);
+		pr_vdebug("%s: unknown descriptor: %d\n", ffs->dev_name, type);
 		return -EINVAL;
 	}
 	return length;
@@ -2718,7 +2720,7 @@ static void __ffs_event_add(struct ffs_data *ffs,
 		break;
 
 	default:
-		WARN(1, "%d: unknown event, this should not happen\n", type);
+		WARN(1, "%s: %d: unknown event, this should not happen\n", ffs->dev_name, type);
 		return;
 	}
 
@@ -2729,11 +2731,11 @@ static void __ffs_event_add(struct ffs_data *ffs,
 			if ((*ev == rem_type1 || *ev == rem_type2) == neg)
 				*out++ = *ev;
 			else
-				pr_vdebug("purging event %d\n", *ev);
+				pr_vdebug("%s: purging event %d\n", ffs->dev_name, *ev);
 		ffs->ev.count = out - ffs->ev.types;
 	}
 
-	pr_vdebug("adding event %d\n", type);
+	pr_vdebug("%s: adding event %d\n", ffs->dev_name, type);
 	ffs->ev.types[ffs->ev.count++] = type;
 	wake_up_locked(&ffs->ev.waitq);
 	if (ffs->ffs_eventfd)
@@ -2802,8 +2804,8 @@ static int __ffs_func_bind_do_descs(struct ffs_data *ffs, enum ffs_entity_type t
 	ffs_ep = func->eps + idx;
 
 	if (ffs_ep->descs[ep_desc_id]) {
-		pr_err("two %sspeed descriptors for EP %d\n",
-			  speed_names[ep_desc_id],
+		pr_err("%s: two %sspeed descriptors for EP %d\n",
+			  ffs->dev_name, speed_names[ep_desc_id],
 			  ds->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK);
 		return -EINVAL;
 	}
@@ -2830,7 +2832,7 @@ static int __ffs_func_bind_do_descs(struct ffs_data *ffs, enum ffs_entity_type t
 		 * endpoint descriptors as if they were full speed.
 		 */
 		wMaxPacketSize = ds->wMaxPacketSize;
-		pr_vdebug("autoconfig\n");
+		pr_vdebug("%s: autoconfig\n", ffs->dev_name);
 		ep = usb_ep_autoconfig(func->gadget, ds);
 		if (!ep)
 			return -ENOTSUPP;
@@ -2911,7 +2913,7 @@ static int __ffs_func_bind_do_nums(struct ffs_data *ffs, enum ffs_entity_type ty
 		break;
 	}
 
-	pr_vdebug("%02x -> %02x\n", *valuep, newValue);
+	pr_vdebug("%s: %02x -> %02x\n", ffs->dev_name, *valuep, newValue);
 	*valuep = newValue;
 	return 0;
 }
@@ -2989,7 +2991,7 @@ static int __ffs_func_bind_do_os_desc(struct ffs_data *ffs, enum ffs_os_desc_typ
 	}
 		break;
 	default:
-		pr_vdebug("unknown descriptor: %d\n", type);
+		pr_vdebug("%s: unknown descriptor: %d\n", ffs->dev_name, type);
 	}
 
 	return length;
@@ -3283,11 +3285,11 @@ static int ffs_func_setup(struct usb_function *f,
 	unsigned long flags;
 	int ret;
 
-	pr_vdebug("creq->bRequestType = %02x\n", creq->bRequestType);
-	pr_vdebug("creq->bRequest     = %02x\n", creq->bRequest);
-	pr_vdebug("creq->wValue       = %04x\n", le16_to_cpu(creq->wValue));
-	pr_vdebug("creq->wIndex       = %04x\n", le16_to_cpu(creq->wIndex));
-	pr_vdebug("creq->wLength      = %04x\n", le16_to_cpu(creq->wLength));
+	pr_vdebug("%s: creq->bRequestType = %02x\n", ffs->dev_name, creq->bRequestType);
+	pr_vdebug("%s: creq->bRequest     = %02x\n", ffs->dev_name, creq->bRequest);
+	pr_vdebug("%s: creq->wValue       = %04x\n", ffs->dev_name, le16_to_cpu(creq->wValue));
+	pr_vdebug("%s: creq->wIndex       = %04x\n", ffs->dev_name, le16_to_cpu(creq->wIndex));
+	pr_vdebug("%s: creq->wLength      = %04x\n", ffs->dev_name, le16_to_cpu(creq->wLength));
 
 	/*
 	 * Most requests directed to interface go through here
@@ -3790,7 +3792,7 @@ static char *ffs_prepare_buffer(struct ffs_data *ffs, const char __user *buf, si
 	if (IS_ERR(data))
 		return data;
 
-	pr_vdebug("Buffer from user space:\n");
+	pr_vdebug("%s: Buffer from user space:\n", ffs->dev_name);
 	ffs_dump_mem("", data, len);
 
 	return data;
