usb: xhci: refactor DCBAA struct

Embed the 'xhci_device_context_array' structure directly within 'xhci_hcd'
instead of allocating it as a separate block. Only the array of device
context addresses is now allocated separately.

Since the device context addresses are no longer part of an array
structure, rename 'dev_context_ptrs' to 'ctx_array' for clearer access
semantics.

Also remove the redundant comment next to the 'ctx_array' allocation;
using dma_alloc_coherent() for 64-bit * N allocations guarantees both
physically contiguous and properly aligned for 64-byte boundaries.
The xHCI section (5.4.6) refers to DCBAAP instead of DCBAA (6.1).

This change does not modify the number of host controller slots but
simplifies memory management and prepares the driver for a variable number
of HC slots in the future.

Signed-off-by: Niklas Neronin <niklas.neronin@linux.intel.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://patch.msgid.link/20260603091132.1110849-14-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c
index 83209db29962..3c304372bad3 100644
--- a/drivers/usb/host/xhci-ring.c
+++ b/drivers/usb/host/xhci-ring.c
@@ -1613,7 +1613,7 @@ static void xhci_handle_cmd_disable_slot(struct xhci_hcd *xhci, int slot_id,
 		/* Delete default control endpoint resources */
 		xhci_free_device_endpoint_resources(xhci, virt_dev, true);
 	if (cmd_comp_code == COMP_SUCCESS) {
-		xhci->dcbaa->dev_context_ptrs[slot_id] = 0;
+		xhci->dcbaa.ctx_array[slot_id] = 0;
 		xhci->devs[slot_id] = NULL;
 	}
 }