[PATCH v2] usbdevfs: Fix broken scatter-gather transfer

[Henrik Rydberg]

The handling of large output bulk transfers is broken; the same user
page is read over and over again. Fixed with this patch.

Signed-off-by: Henrik Rydberg <rydberg@xxxxxxxxxxx>
---
 drivers/usb/core/devio.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/core/devio.c b/drivers/usb/core/devio.c
index ebb8a9d..6e58b59 100644
--- a/drivers/usb/core/devio.c
+++ b/drivers/usb/core/devio.c
@@ -1349,6 +1351,7 @@
 					goto error;
 				}
 			}
+			uurb->buffer += u;
 			totlen -= u;
 		}
 	} else if (uurb->buffer_length > 0) {

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