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usb: xhci: Fix DMA address calculation in queue_trb

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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>
Reviewed-by: Marek Vasut <marex@denx.de>
This commit is contained in:
Hector Martin 2023-10-29 15:37:44 +09:00 • committed by Marek Vasut
parent 2fd7037122
commit a14843fdac
1 changed files with 4 additions and 1 deletions
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5
drivers/usb/host/xhci-ring.c
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@ -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;
}
/**