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| author | Andiry Xu <andiry.xu@amd.com> | 2011-09-02 11:05:57 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-09-09 15:52:54 -0700 |
| commit | 2ffdea25f054439c31c24b248faa647685280571 (patch) | |
| tree | e15603e52db3cd197642fccc115bc58abb4185bb /drivers/usb/host | |
| parent | fd984d242afbe13bd94c60b6754feda93be69bd7 (diff) | |
| download | op-kernel-dev-2ffdea25f054439c31c24b248faa647685280571.zip op-kernel-dev-2ffdea25f054439c31c24b248faa647685280571.tar.gz | |
xHCI: refine td allocation
In xhci_urb_enqueue(), allocate a block of memory for all the TDs instead
of allocating memory for each of them separately. This reduces the number
of kzalloc calling when an isochronous usb is submitted.
Signed-off-by: Andiry Xu <andiry.xu@amd.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/host')
| -rw-r--r-- | drivers/usb/host/xhci-mem.c | 14 | ||||
| -rw-r--r-- | drivers/usb/host/xhci.c | 15 |
2 files changed, 12 insertions, 17 deletions
diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c index 1c5c9ba..c4b8959 100644 --- a/drivers/usb/host/xhci-mem.c +++ b/drivers/usb/host/xhci-mem.c @@ -1666,18 +1666,10 @@ struct xhci_command *xhci_alloc_command(struct xhci_hcd *xhci, void xhci_urb_free_priv(struct xhci_hcd *xhci, struct urb_priv *urb_priv) { - int last; - - if (!urb_priv) - return; - - last = urb_priv->length - 1; - if (last >= 0) { - int i; - for (i = 0; i <= last; i++) - kfree(urb_priv->td[i]); + if (urb_priv) { + kfree(urb_priv->td[0]); + kfree(urb_priv); } - kfree(urb_priv); } void xhci_free_command(struct xhci_hcd *xhci, diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c index 40b82f7..6440bd2 100644 --- a/drivers/usb/host/xhci.c +++ b/drivers/usb/host/xhci.c @@ -1035,6 +1035,7 @@ static int xhci_check_maxpacket(struct xhci_hcd *xhci, unsigned int slot_id, 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; @@ -1065,13 +1066,15 @@ int xhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, gfp_t mem_flags) if (!urb_priv) return -ENOMEM; + buffer = kzalloc(size * sizeof(struct xhci_td), mem_flags); + if (!buffer) { + kfree(urb_priv); + return -ENOMEM; + } + for (i = 0; i < size; i++) { - urb_priv->td[i] = kzalloc(sizeof(struct xhci_td), mem_flags); - if (!urb_priv->td[i]) { - urb_priv->length = i; - xhci_urb_free_priv(xhci, urb_priv); - return -ENOMEM; - } + urb_priv->td[i] = buffer; + buffer++; } urb_priv->length = size; |
