[PATCH 0/3] usb: xhci: allocate arrays based on supported slot amount

[Niklas Neronin <niklas.neronin@linux.intel.com>]

The xHCI specification allows for up to 255 device slots, but the actual
number of slots supported by the controller may be lower.

Prior to this patch, the xhci driver allocated the devices and device
context pointer arrays to 255 slots, regardless of the supported amount.
Each entry is 8 bytes, which results in 4080 bytes being allocated even
on systems that support far fewer slots.

Address this by allocating these arrays based on the number of slots
supported by the controller. This approach is consistent with how the
driver already handles allocation for ports and interrupters.

Niklas Neronin (3):
  usb: xhci: refactor DCBAA struct
  usb: xhci: allocate DCBAA based on host controller max slots
  usb: xhci: allocate internal DCBAA mirror dynamically

 drivers/usb/host/xhci-mem.c  | 54 +++++++++++++++++++++---------------
 drivers/usb/host/xhci-ring.c |  6 ++--
 drivers/usb/host/xhci.c      | 10 +++----
 drivers/usb/host/xhci.h      | 27 ++++++++++--------
 4 files changed, 54 insertions(+), 43 deletions(-)

-- 
2.50.1