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xhci: dbgtty: remove kfifo_out() wrapper

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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@kernel.org>
Cc: Mathias Nyman <mathias.nyman@intel.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: linux-usb@vger.kernel.org
Link: https://lore.kernel.org/r/20240808103549.429349-5-jirislaby@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jiri Slaby (SUSE) 2024-08-08 12:35:40 +02:00 committed by Greg Kroah-Hartman
parent b1ce5164b5
commit 2b21751443
1 changed files with 1 additions and 14 deletions
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15
drivers/usb/host/xhci-dbgtty.c
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@ -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;