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    Subject[PATCH] USB: XHCI: xhci-ring: Remove unused dma address calculation in inc_enq and inc_deq function
    From
    Date
    Resending patch with latest kernel code:
    In xhci-ring.c, function inc_enq and inc_deq calculate the dma address
    of trb but never used.



    Signed-off-by: Girish Verma <girish@circuitsutra.com>
    ---
    drivers/usb/host/xhci-ring.c | 4 ----
    1 files changed, 0 insertions(+), 4 deletions(-)

    diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c
    index 643c2f3..5c5c47b 100644
    --- a/drivers/usb/host/xhci-ring.c
    +++ b/drivers/usb/host/xhci-ring.c
    @@ -145,7 +145,6 @@ static void next_trb(struct xhci_hcd *xhci,
    */
    static void inc_deq(struct xhci_hcd *xhci, struct xhci_ring *ring)
    {
    - unsigned long long addr;

    ring->deq_updates++;

    @@ -176,7 +175,6 @@ static void inc_deq(struct xhci_hcd *xhci, struct
    xhci_ring *ring)
    }
    } while (last_trb(xhci, ring, ring->deq_seg, ring->dequeue));

    - addr = (unsigned long long) xhci_trb_virt_to_dma(ring->deq_seg,
    ring->dequeue);
    }

    /*
    @@ -201,7 +199,6 @@ static void inc_enq(struct xhci_hcd *xhci, struct
    xhci_ring *ring,
    {
    u32 chain;
    union xhci_trb *next;
    - unsigned long long addr;

    chain = le32_to_cpu(ring->enqueue->generic.field[3]) & TRB_CHAIN;
    /* If this is not event ring, there is one less usable TRB */
    @@ -253,7 +250,6 @@ static void inc_enq(struct xhci_hcd *xhci, struct
    xhci_ring *ring,
    ring->enqueue = ring->enq_seg->trbs;
    next = ring->enqueue;
    }
    - addr = (unsigned long long) xhci_trb_virt_to_dma(ring->enq_seg,
    ring->enqueue);
    }

    /*
    --
    1.7.0.4



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