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DM USB: introduce helper functions: index_inc and index_valid

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Introduce helper functions to make code shorter and cleaner.

Tracked-On: #3628
Signed-off-by: Xiaoguang Wu <xiaoguang.wu@intel.com>
Acked-by: Yu Wang <yu1.wang@intel.com>
This commit is contained in:
Xiaoguang Wu
2019-09-09 18:18:56 +08:00
committed by wenlingz
parent d58a766556
commit 1352eca224
5 changed files with 41 additions and 43 deletions
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8
devicemodel/hw/pci/xhci.c
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@@ -2663,13 +2663,13 @@ pci_xhci_xfer_complete(struct pci_xhci_vdev *xdev, struct usb_xfer *xfer,
xfer->data[i].stat = USB_BLOCK_FREE;
xfer->ndata--;
xfer->head = (xfer->head + 1) % USB_MAX_XFER_BLOCKS;
xfer->head = index_inc(xfer->head, USB_MAX_XFER_BLOCKS);
edtla += xfer->data[i].bdone;
trb->dwTrb3 = (trb->dwTrb3 & ~0x1) | (xfer->data[i].ccs);
if (xfer->data[i].type == USB_DATA_PART) {
rem_len += xfer->data[i].blen;
i = (i + 1) % USB_MAX_XFER_BLOCKS;
i = index_inc(i, USB_MAX_XFER_BLOCKS);
/* This 'continue' will delay the IOC behavior which
* could decrease the number of virtual interrupts.
@@ -2688,7 +2688,7 @@ pci_xhci_xfer_complete(struct pci_xhci_vdev *xdev, struct usb_xfer *xfer,
!((err == XHCI_TRB_ERROR_SHORT_PKT) &&
(trb->dwTrb3 & XHCI_TRB_3_ISP_BIT))) {
i = (i + 1) % USB_MAX_XFER_BLOCKS;
i = index_inc(i, USB_MAX_XFER_BLOCKS);
continue;
}
@@ -2713,7 +2713,7 @@ pci_xhci_xfer_complete(struct pci_xhci_vdev *xdev, struct usb_xfer *xfer,
if (err != XHCI_TRB_ERROR_SUCCESS)
break;
i = (i + 1) % USB_MAX_XFER_BLOCKS;
i = index_inc(i, USB_MAX_XFER_BLOCKS);
rem_len = 0;
}