From a14843fdac24bf18bd58152b959ca0425adaa1e4 Mon Sep 17 00:00:00 2001 From: Hector Martin Date: Sun, 29 Oct 2023 15:37:44 +0900 Subject: [PATCH] usb: xhci: Fix DMA address calculation in queue_trb We need to get the DMA address before incrementing the pointer, as that might move us onto another segment. Signed-off-by: Hector Martin Reviewed-by: Marek Vasut --- 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 ae0ab5744d..b60661fe05 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; } /** -- 2.39.5