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path: root/drivers/usb/host/xhci-ring.c
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Diffstat (limited to 'drivers/usb/host/xhci-ring.c')
-rw-r--r--drivers/usb/host/xhci-ring.c10
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c
index b46b5b98a943..5fb66db89e05 100644
--- a/drivers/usb/host/xhci-ring.c
+++ b/drivers/usb/host/xhci-ring.c
@@ -1946,7 +1946,7 @@ static int process_ctrl_td(struct xhci_hcd *xhci, struct xhci_td *td,
1946 if (event_trb != ep_ring->dequeue) { 1946 if (event_trb != ep_ring->dequeue) {
1947 /* The event was for the status stage */ 1947 /* The event was for the status stage */
1948 if (event_trb == td->last_trb) { 1948 if (event_trb == td->last_trb) {
1949 if (td->urb->actual_length != 0) { 1949 if (td->urb_length_set) {
1950 /* Don't overwrite a previously set error code 1950 /* Don't overwrite a previously set error code
1951 */ 1951 */
1952 if ((*status == -EINPROGRESS || *status == 0) && 1952 if ((*status == -EINPROGRESS || *status == 0) &&
@@ -1960,7 +1960,13 @@ static int process_ctrl_td(struct xhci_hcd *xhci, struct xhci_td *td,
1960 td->urb->transfer_buffer_length; 1960 td->urb->transfer_buffer_length;
1961 } 1961 }
1962 } else { 1962 } else {
1963 /* Maybe the event was for the data stage? */ 1963 /*
1964 * Maybe the event was for the data stage? If so, update
1965 * already the actual_length of the URB and flag it as
1966 * set, so that it is not overwritten in the event for
1967 * the last TRB.
1968 */
1969 td->urb_length_set = true;
1964 td->urb->actual_length = 1970 td->urb->actual_length =
1965 td->urb->transfer_buffer_length - 1971 td->urb->transfer_buffer_length -
1966 EVENT_TRB_LEN(le32_to_cpu(event->transfer_len)); 1972 EVENT_TRB_LEN(le32_to_cpu(event->transfer_len));