xhci: dbc: Pass dbc pointer to get_in/out_ep() helper functions to get endpoints

Pass dbc pointer instead of struct xhci_hcd pointer to the get_in_ep() and
get_out_ep() helper functions.

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/20200723144530.9992-17-mathias.nyman@linux.intel.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/host/xhci-dbgcap.c

@@ -593,7 +593,7 @@ static void dbc_handle_xfer_event(struct xhci_dbc *dbc, union xhci_trb *event)
 	remain_length	= EVENT_TRB_LEN(le32_to_cpu(event->generic.field[2]));
 	ep_id		= TRB_TO_EP_ID(le32_to_cpu(event->generic.field[3]));
 	dep		= (ep_id == EPID_OUT) ?
-				get_out_ep(xhci) : get_in_ep(xhci);
+				get_out_ep(dbc) : get_in_ep(dbc);
 	ring		= dep->ring;
 
 	switch (comp_code) {
@@ -710,12 +710,12 @@ static enum evtreturn xhci_dbc_do_handle_events(struct xhci_dbc *dbc)
 			dbc->state = DS_STALLED;
 
 			if (ctrl & DBC_CTRL_HALT_IN_TR) {
-				dep = get_in_ep(xhci);
+				dep = get_in_ep(dbc);
 				xhci_dbc_flush_endpoint_requests(dep);
 			}
 
 			if (ctrl & DBC_CTRL_HALT_OUT_TR) {
-				dep = get_out_ep(xhci);
+				dep = get_out_ep(dbc);
 				xhci_dbc_flush_endpoint_requests(dep);
 			}
 

drivers/usb/host/xhci-dbgcap.h

@@ -179,17 +179,13 @@ enum evtreturn {
 	EVT_DISC,
 };
 
-static inline struct dbc_ep *get_in_ep(struct xhci_hcd *xhci)
+static inline struct dbc_ep *get_in_ep(struct xhci_dbc *dbc)
 {
-	struct xhci_dbc		*dbc = xhci->dbc;
-
 	return &dbc->eps[BULK_IN];
 }
 
-static inline struct dbc_ep *get_out_ep(struct xhci_hcd *xhci)
+static inline struct dbc_ep *get_out_ep(struct xhci_dbc *dbc)
 {
-	struct xhci_dbc		*dbc = xhci->dbc;
-
 	return &dbc->eps[BULK_OUT];
 }
 

drivers/usb/host/xhci-dbgtty.c

@@ -418,7 +418,7 @@ static const struct tty_port_operations dbc_port_ops = {
 };
 
 static void
-xhci_dbc_tty_init_port(struct xhci_hcd *xhci, struct dbc_port *port)
+xhci_dbc_tty_init_port(struct xhci_dbc *dbc, struct dbc_port *port)
 {
 	tty_port_init(&port->port);
 	spin_lock_init(&port->port_lock);
@@ -427,8 +427,8 @@ xhci_dbc_tty_init_port(struct xhci_hcd *xhci, struct dbc_port *port)
 	INIT_LIST_HEAD(&port->read_queue);
 	INIT_LIST_HEAD(&port->write_pool);
 
-	port->in =		get_in_ep(xhci);
-	port->out =		get_out_ep(xhci);
+	port->in =		get_in_ep(dbc);
+	port->out =		get_out_ep(dbc);
 	port->port.ops =	&dbc_port_ops;
 	port->n_read =		0;
 }
@@ -446,7 +446,7 @@ int xhci_dbc_tty_register_device(struct xhci_dbc *dbc)
 	struct device		*tty_dev;
 	struct dbc_port		*port = &dbc->port;
 
-	xhci_dbc_tty_init_port(xhci, port);
+	xhci_dbc_tty_init_port(dbc, port);
 	tty_dev = tty_port_register_device(&port->port,
 					   dbc_tty_driver, 0, NULL);
 	if (IS_ERR(tty_dev)) {
@@ -497,7 +497,7 @@ void xhci_dbc_tty_unregister_device(struct xhci_dbc *dbc)
 	port->registered = false;
 
 	kfifo_free(&port->write_fifo);
-	xhci_dbc_free_requests(get_out_ep(xhci), &port->read_pool);
-	xhci_dbc_free_requests(get_out_ep(xhci), &port->read_queue);
-	xhci_dbc_free_requests(get_in_ep(xhci), &port->write_pool);
+	xhci_dbc_free_requests(get_out_ep(dbc), &port->read_pool);
+	xhci_dbc_free_requests(get_out_ep(dbc), &port->read_queue);
+	xhci_dbc_free_requests(get_in_ep(dbc), &port->write_pool);
 }