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| author | Sarah Sharp <sarah.a.sharp@linux.intel.com> | 2010-10-26 11:03:44 -0700 |
|---|---|---|
| committer | Sarah Sharp <sarah.a.sharp@linux.intel.com> | 2011-03-13 18:07:13 -0700 |
| commit | b02d0ed677acb3465e7600366f2353413bf24074 (patch) | |
| tree | 8efdbb5ea07a387a687aa24f0bcda8ba3a454d76 /drivers/usb/host/xhci.h | |
| parent | 214f76f7d9198ddd090bd927a4bcd49391bfcd36 (diff) | |
| download | blackbird-op-linux-b02d0ed677acb3465e7600366f2353413bf24074.tar.gz blackbird-op-linux-b02d0ed677acb3465e7600366f2353413bf24074.zip | |
xhci: Change hcd_priv into a pointer.
Instead of allocating space for the whole xhci_hcd structure at the end of
usb_hcd, make the USB core allocate enough space for a pointer to the
xhci_hcd structure. This will make it easy to share the xhci_hcd
structure across the two roothubs (the USB 3.0 usb_hcd and the USB 2.0
usb_hcd).
Deallocate the xhci_hcd at PCI remove time, so the hcd_priv will be
deallocated after the usb_hcd is deallocated. We do this by registering a
different PCI remove function that calls the usb_hcd_pci_remove()
function, and then frees the xhci_hcd. usb_hcd_pci_remove() calls
kput() on the usb_hcd structure, which will deallocate the memory that
contains the hcd_priv pointer, but not the memory it points to.
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Diffstat (limited to 'drivers/usb/host/xhci.h')
| -rw-r--r-- | drivers/usb/host/xhci.h | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h index c4e70c6d809c..daa88581ad66 100644 --- a/drivers/usb/host/xhci.h +++ b/drivers/usb/host/xhci.h @@ -1163,6 +1163,7 @@ struct s3_save { /* There is one ehci_hci structure per controller */ struct xhci_hcd { + struct usb_hcd *main_hcd; /* glue to PCI and HCD framework */ struct xhci_cap_regs __iomem *cap_regs; struct xhci_op_regs __iomem *op_regs; @@ -1266,12 +1267,12 @@ struct xhci_hcd { /* convert between an HCD pointer and the corresponding EHCI_HCD */ static inline struct xhci_hcd *hcd_to_xhci(struct usb_hcd *hcd) { - return (struct xhci_hcd *) (hcd->hcd_priv); + return *((struct xhci_hcd **) (hcd->hcd_priv)); } static inline struct usb_hcd *xhci_to_hcd(struct xhci_hcd *xhci) { - return container_of((void *) xhci, struct usb_hcd, hcd_priv); + return xhci->main_hcd; } #ifdef CONFIG_USB_XHCI_HCD_DEBUGGING |
