xhci: dbc: Pass dbc pointer to dbc_handle_xfer_event() instead of xhci_hcd pointer

The event handling function only used xhci pointer to get the dbc pointer.
Pass the dbc pointer instead as a parameter

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/20200723144530.9992-15-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/host/xhci-dbgcap.c b/drivers/usb/host/xhci-dbgcap.c
index 7dce1e0..1c53fdc 100644 (file)
--- a/drivers/usb/host/xhci-dbgcap.c
+++ b/drivers/usb/host/xhci-dbgcap.c
@@ -579,7 +579,7 @@ dbc_handle_port_status(struct xhci_dbc *dbc, union xhci_trb *event)
        writel(portsc & ~DBC_PORTSC_RESET_CHANGE, &dbc->regs->portsc);
 }
 
-static void dbc_handle_xfer_event(struct xhci_hcd *xhci, union xhci_trb *event)
+static void dbc_handle_xfer_event(struct xhci_dbc *dbc, union xhci_trb *event)
 {
        struct dbc_ep           *dep;
        struct xhci_ring        *ring;
@@ -588,7 +588,6 @@ static void dbc_handle_xfer_event(struct xhci_hcd *xhci, union xhci_trb *event)
        u32                     comp_code;
        size_t                  remain_length;
        struct dbc_request      *req = NULL, *r;
-       struct xhci_dbc         *dbc = xhci->dbc;
 
        comp_code       = GET_COMP_CODE(le32_to_cpu(event->generic.field[2]));
        remain_length   = EVENT_TRB_LEN(le32_to_cpu(event->generic.field[2]));
@@ -654,7 +653,6 @@ static enum evtreturn xhci_dbc_do_handle_events(struct xhci_dbc *dbc)
        struct dbc_ep           *dep;
        union xhci_trb          *evt;
        u32                     ctrl, portsc;
-       struct xhci_hcd         *xhci = dbc->xhci;
        bool                    update_erdp = false;
 
        /* DbC state machine: */
@@ -763,7 +761,7 @@ static enum evtreturn xhci_dbc_do_handle_events(struct xhci_dbc *dbc)
                        dbc_handle_port_status(dbc, evt);
                        break;
                case TRB_TYPE(TRB_TRANSFER):
-                       dbc_handle_xfer_event(xhci, evt);
+                       dbc_handle_xfer_event(dbc, evt);
                        break;
                default:
                        break;