--- zzzz-none-000/linux-3.10.107/Documentation/usb/mass-storage.txt 2017-06-27 09:49:32.000000000 +0000 +++ scorpion-7490-727/linux-3.10.107/Documentation/usb/mass-storage.txt 2021-02-04 17:41:59.000000000 +0000 @@ -13,7 +13,7 @@ operation. Note that the driver is slightly non-portable in that it assumes - a single memory/DMA buffer will be useable for bulk-in and bulk-out + a single memory/DMA buffer will be usable for bulk-in and bulk-out endpoints. With most device controllers this is not an issue, but there may be some with hardware restrictions that prevent a buffer from being used by more than one endpoint.