diff --git a/drivers/usb/gadget/f_mass_storage.c b/drivers/usb/gadget/f_mass_storage.c
index 7569414731489da4017149e8e172964189caea20..927ee88278bd1be3e752d95a20e51d5c179f6278 100644
--- a/drivers/usb/gadget/f_mass_storage.c
+++ b/drivers/usb/gadget/f_mass_storage.c
@@ -958,9 +958,7 @@ static int do_write(struct fsg_common *common)
 			 * equal to the buffer size, which is divisible by
 			 * the bulk-out maxpacket size.
 			 */
-			bh->outreq->length = amount;
-			bh->bulk_out_intended_length = amount;
-			bh->outreq->short_not_ok = 1;
+			set_bulk_out_req_length(common, bh, amount);
 			if (!start_out_transfer(common, bh))
 				/* Dunno what to do if common->fsg is NULL */
 				return -EIO;
@@ -995,6 +993,11 @@ static int do_write(struct fsg_common *common)
 				amount = curlun->file_length - file_offset;
 			}
 
+			/* Don't accept excess data.  The spec doesn't say
+			 * what to do in this case.  We'll ignore the error.
+			 */
+			amount = min(amount, bh->bulk_out_intended_length);
+
 			/* Don't write a partial block */
 			amount = round_down(amount, curlun->blksize);
 			if (amount == 0)
@@ -1034,7 +1037,7 @@ static int do_write(struct fsg_common *common)
 
  empty_write:
 			/* Did the host decide to stop early? */
-			if (bh->outreq->actual != bh->outreq->length) {
+			if (bh->outreq->actual < bh->bulk_out_intended_length) {
 				common->short_packet_received = 1;
 				break;
 			}
@@ -1592,7 +1595,7 @@ static int throw_away_data(struct fsg_common *common)
 			common->next_buffhd_to_drain = bh->next;
 
 			/* A short packet or an error ends everything */
-			if (bh->outreq->actual != bh->outreq->length ||
+			if (bh->outreq->actual < bh->bulk_out_intended_length ||
 			    bh->outreq->status != 0) {
 				raise_exception(common,
 						FSG_STATE_ABORT_BULK_OUT);
@@ -1612,9 +1615,7 @@ static int throw_away_data(struct fsg_common *common)
 			 * equal to the buffer size, which is divisible by
 			 * the bulk-out maxpacket size.
 			 */
-			bh->outreq->length = amount;
-			bh->bulk_out_intended_length = amount;
-			bh->outreq->short_not_ok = 1;
+			set_bulk_out_req_length(common, bh, amount);
 			if (!start_out_transfer(common, bh))
 				/* Dunno what to do if common->fsg is NULL */
 				return -EIO;
@@ -2289,7 +2290,6 @@ static int get_next_command(struct fsg_common *common)
 
 	/* Queue a request to read a Bulk-only CBW */
 	set_bulk_out_req_length(common, bh, USB_BULK_CB_WRAP_LEN);
-	bh->outreq->short_not_ok = 1;
 	if (!start_out_transfer(common, bh))
 		/* Don't know what to do if common->fsg is NULL */
 		return -EIO;
diff --git a/drivers/usb/gadget/file_storage.c b/drivers/usb/gadget/file_storage.c
index 12ac30b21ba6a93854829f5b61434397454719fd..a230009db7347ef8562e5ee240aecf75f7661f8e 100644
--- a/drivers/usb/gadget/file_storage.c
+++ b/drivers/usb/gadget/file_storage.c
@@ -1335,9 +1335,7 @@ static int do_write(struct fsg_dev *fsg)
 			 * equal to the buffer size, which is divisible by
 			 * the bulk-out maxpacket size.
 			 */
-			bh->outreq->length = bh->bulk_out_intended_length =
-					amount;
-			bh->outreq->short_not_ok = 1;
+			set_bulk_out_req_length(fsg, bh, amount);
 			start_transfer(fsg, fsg->bulk_out, bh->outreq,
 					&bh->outreq_busy, &bh->state);
 			fsg->next_buffhd_to_fill = bh->next;
@@ -1370,6 +1368,11 @@ static int do_write(struct fsg_dev *fsg)
 				amount = curlun->file_length - file_offset;
 			}
 
+			/* Don't accept excess data.  The spec doesn't say
+			 * what to do in this case.  We'll ignore the error.
+			 */
+			amount = min(amount, bh->bulk_out_intended_length);
+
 			/* Don't write a partial block */
 			amount = round_down(amount, curlun->blksize);
 			if (amount == 0)
@@ -1409,7 +1412,7 @@ static int do_write(struct fsg_dev *fsg)
 
  empty_write:
 			/* Did the host decide to stop early? */
-			if (bh->outreq->actual != bh->outreq->length) {
+			if (bh->outreq->actual < bh->bulk_out_intended_length) {
 				fsg->short_packet_received = 1;
 				break;
 			}
@@ -1953,7 +1956,7 @@ static int throw_away_data(struct fsg_dev *fsg)
 			fsg->next_buffhd_to_drain = bh->next;
 
 			/* A short packet or an error ends everything */
-			if (bh->outreq->actual != bh->outreq->length ||
+			if (bh->outreq->actual < bh->bulk_out_intended_length ||
 					bh->outreq->status != 0) {
 				raise_exception(fsg, FSG_STATE_ABORT_BULK_OUT);
 				return -EINTR;
@@ -1971,9 +1974,7 @@ static int throw_away_data(struct fsg_dev *fsg)
 			 * equal to the buffer size, which is divisible by
 			 * the bulk-out maxpacket size.
 			 */
-			bh->outreq->length = bh->bulk_out_intended_length =
-					amount;
-			bh->outreq->short_not_ok = 1;
+			set_bulk_out_req_length(fsg, bh, amount);
 			start_transfer(fsg, fsg->bulk_out, bh->outreq,
 					&bh->outreq_busy, &bh->state);
 			fsg->next_buffhd_to_fill = bh->next;
@@ -2652,7 +2653,6 @@ static int get_next_command(struct fsg_dev *fsg)
 
 		/* Queue a request to read a Bulk-only CBW */
 		set_bulk_out_req_length(fsg, bh, USB_BULK_CB_WRAP_LEN);
-		bh->outreq->short_not_ok = 1;
 		start_transfer(fsg, fsg->bulk_out, bh->outreq,
 				&bh->outreq_busy, &bh->state);