There is no need to check against kfifo_len() before kfifo_out(). Just
ask the latter for data and it tells how much it retrieved. Or returns 0
in case there are no more.
Signed-off-by: Jiri Slaby (SUSE) <jirislaby@xxxxxxxxxx>
Cc: Mathias Nyman <mathias.nyman@xxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Cc: linux-usb@xxxxxxxxxxxxxxx
---
drivers/usb/host/xhci-dbgtty.c | 15 +--------------
1 file changed, 1 insertion(+), 14 deletions(-)
diff --git a/drivers/usb/host/xhci-dbgtty.c b/drivers/usb/host/xhci-dbgtty.c
index b74e98e94393..64ea96494997 100644
--- a/drivers/usb/host/xhci-dbgtty.c
+++ b/drivers/usb/host/xhci-dbgtty.c
@@ -24,19 +24,6 @@ static inline struct dbc_port *dbc_to_port(struct xhci_dbc *dbc)
return dbc->priv;
}
-static unsigned int
-dbc_send_packet(struct dbc_port *port, char *packet, unsigned int size)
-{
- unsigned int len;
-
- len = kfifo_len(&port->write_fifo);
- if (len < size)
- size = len;
- if (size != 0)
- size = kfifo_out(&port->write_fifo, packet, size);
- return size;
-}
-
static int dbc_start_tx(struct dbc_port *port)
__releases(&port->port_lock)
__acquires(&port->port_lock)
@@ -49,7 +36,7 @@ static int dbc_start_tx(struct dbc_port *port)
while (!list_empty(pool)) {
req = list_entry(pool->next, struct dbc_request, list_pool);
- len = dbc_send_packet(port, req->buf, DBC_MAX_PACKET);
+ len = kfifo_out(&port->write_fifo, req->buf, DBC_MAX_PACKET);
if (len == 0)
break;
do_tty_wake = true;
--
2.46.0
