We need to get the DMA address before incrementing the pointer, as that might move us onto another segment.
Signed-off-by: Hector Martin marcan@marcan.st --- drivers/usb/host/xhci-ring.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c index ae0ab5744df0..b60661fe05e7 100644 --- a/drivers/usb/host/xhci-ring.c +++ b/drivers/usb/host/xhci-ring.c @@ -202,6 +202,7 @@ static dma_addr_t queue_trb(struct xhci_ctrl *ctrl, struct xhci_ring *ring, bool more_trbs_coming, unsigned int *trb_fields) { struct xhci_generic_trb *trb; + dma_addr_t addr; int i;
trb = &ring->enqueue->generic; @@ -211,9 +212,11 @@ static dma_addr_t queue_trb(struct xhci_ctrl *ctrl, struct xhci_ring *ring,
xhci_flush_cache((uintptr_t)trb, sizeof(struct xhci_generic_trb));
+ addr = xhci_trb_virt_to_dma(ring->enq_seg, (union xhci_trb *)trb); + inc_enq(ctrl, ring, more_trbs_coming);
- return xhci_trb_virt_to_dma(ring->enq_seg, (union xhci_trb *)trb); + return addr; }
/**