xhci: Don't write zeroed pointers to xHC registers.

[linux-flexiantxendom0.git] / drivers / usb / host / xhci-mem.c

diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c
index c69cf54..01c3800 100644 (file)
--- a/drivers/usb/host/xhci-mem.c
+++ b/drivers/usb/host/xhci-mem.c
@@ -1704,11 +1704,6 @@ void xhci_mem_cleanup(struct xhci_hcd *xhci)
        int i;
 
        /* Free the Event Ring Segment Table and the actual Event Ring */
-       if (xhci->ir_set) {
-               xhci_writel(xhci, 0, &xhci->ir_set->erst_size);
-               xhci_write_64(xhci, 0, &xhci->ir_set->erst_base);
-               xhci_write_64(xhci, 0, &xhci->ir_set->erst_dequeue);
-       }
        size = sizeof(struct xhci_erst_entry)*(xhci->erst.num_entries);
        if (xhci->erst.entries)
                dma_free_coherent(&pdev->dev, size,
@@ -1720,7 +1715,6 @@ void xhci_mem_cleanup(struct xhci_hcd *xhci)
        xhci->event_ring = NULL;
        xhci_dbg(xhci, "Freed event ring\n");
 
-       xhci_write_64(xhci, 0, &xhci->op_regs->cmd_ring);
        if (xhci->cmd_ring)
                xhci_ring_free(xhci, xhci->cmd_ring);
        xhci->cmd_ring = NULL;
@@ -1749,7 +1743,6 @@ void xhci_mem_cleanup(struct xhci_hcd *xhci)
        xhci->medium_streams_pool = NULL;
        xhci_dbg(xhci, "Freed medium stream array pool\n");
 
-       xhci_write_64(xhci, 0, &xhci->op_regs->dcbaa_ptr);
        if (xhci->dcbaa)
                dma_free_coherent(&pdev->dev, sizeof(*xhci->dcbaa),
                                xhci->dcbaa, xhci->dcbaa->dma);
@@ -2358,6 +2351,8 @@ int xhci_mem_init(struct xhci_hcd *xhci, gfp_t flags)
 
 fail:
        xhci_warn(xhci, "Couldn't initialize memory\n");
+       xhci_halt(xhci);
+       xhci_reset(xhci);
        xhci_mem_cleanup(xhci);
        return -ENOMEM;
 }