diff options
| author | Mathias Nyman <mathias.nyman@linux.intel.com> | 2017-01-23 13:20:26 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-01-25 11:00:02 +0100 |
| commit | 7e64b0373af50fa46d3bf441f1c079615bbdf77f (patch) | |
| tree | d5988e439ab7bb6a6364ef8d82ef64d7b7b44681 /drivers/usb/host/xhci.c | |
| parent | xhci: Rename variables related to transfer descritpors (diff) | |
| download | linux-7e64b0373af50fa46d3bf441f1c079615bbdf77f.tar.xz linux-7e64b0373af50fa46d3bf441f1c079615bbdf77f.zip | |
xhci: simplify how we store TDs in urb private data
Instead of storing a zero length array of td pointers, and then
allocate memory both for the td pointer array and the td's, just
use a zero length array of actual td's in urb private data.
old:
struct urb_priv {
struct xhci_td *td[0]
}
new:
struct urb_priv {
struct xhci_td td[0]
}
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/host/xhci.c')
| -rw-r--r-- | drivers/usb/host/xhci.c | 24 |
1 files changed, 6 insertions, 18 deletions
diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c index bee6272b9bfd..dde5c2da0d7a 100644 --- a/drivers/usb/host/xhci.c +++ b/drivers/usb/host/xhci.c @@ -1332,12 +1332,11 @@ command_cleanup: int xhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, gfp_t mem_flags) { struct xhci_hcd *xhci = hcd_to_xhci(hcd); - struct xhci_td *buffer; unsigned long flags; int ret = 0; unsigned int slot_id, ep_index; struct urb_priv *urb_priv; - int num_tds, i; + int num_tds; if (!urb || xhci_check_args(hcd, urb->dev, urb->ep, true, true, __func__) <= 0) @@ -1364,21 +1363,10 @@ int xhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, gfp_t mem_flags) num_tds = 1; urb_priv = kzalloc(sizeof(struct urb_priv) + - num_tds * sizeof(struct xhci_td *), mem_flags); + num_tds * sizeof(struct xhci_td), mem_flags); if (!urb_priv) return -ENOMEM; - buffer = kzalloc(num_tds * sizeof(struct xhci_td), mem_flags); - if (!buffer) { - kfree(urb_priv); - return -ENOMEM; - } - - for (i = 0; i < num_tds; i++) { - urb_priv->td[i] = buffer; - buffer++; - } - urb_priv->num_tds = num_tds; urb_priv->num_tds_done = 0; urb->hcpriv = urb_priv; @@ -1526,7 +1514,7 @@ int xhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status) for (i = urb_priv->num_tds_done; i < urb_priv->num_tds && xhci->devs[urb->dev->slot_id]; i++) { - td = urb_priv->td[i]; + td = &urb_priv->td[i]; if (!list_empty(&td->td_list)) list_del_init(&td->td_list); if (!list_empty(&td->cancelled_td_list)) @@ -1557,11 +1545,11 @@ int xhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status) urb, urb->dev->devpath, urb->ep->desc.bEndpointAddress, (unsigned long long) xhci_trb_virt_to_dma( - urb_priv->td[i]->start_seg, - urb_priv->td[i]->first_trb)); + urb_priv->td[i].start_seg, + urb_priv->td[i].first_trb)); for (; i < urb_priv->num_tds; i++) { - td = urb_priv->td[i]; + td = &urb_priv->td[i]; list_add_tail(&td->cancelled_td_list, &ep->cancelled_td_list); } |