xhci: dbc: Don't pass the xhci pointer as a parameter to xhci_dbc_init_context()

xhci_dbc_init_context() no longer needs the struct xhci_hcd pointer.
Pass the dbc pointer directly instead.

No functional changes
This change helps decoupling xhci and DbC
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20200723144530.9992-11-mathias.nyman@linux.intel.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/host/xhci-dbgcap.c

@@ -63,16 +63,14 @@ static u32 xhci_dbc_populate_strings(struct dbc_str_descs *strings)
 	return string_length;
 }
 
-static void xhci_dbc_init_contexts(struct xhci_hcd *xhci, u32 string_length)
+static void xhci_dbc_init_contexts(struct xhci_dbc *dbc, u32 string_length)
 {
-	struct xhci_dbc		*dbc;
 	struct dbc_info_context	*info;
 	struct xhci_ep_ctx	*ep_ctx;
 	u32			dev_info;
 	dma_addr_t		deq, dma;
 	unsigned int		max_burst;
 
-	dbc = xhci->dbc;
 	if (!dbc)
 		return;
 
@@ -421,7 +419,7 @@ static int xhci_dbc_mem_init(struct xhci_hcd *xhci, gfp_t flags)
 
 	/* Setup strings and contexts: */
 	string_length = xhci_dbc_populate_strings(dbc->string);
-	xhci_dbc_init_contexts(xhci, string_length);
+	xhci_dbc_init_contexts(dbc, string_length);
 
 	xhci_dbc_eps_init(xhci);
 	dbc->state = DS_INITIALIZED;