Merge wireless into wireless-next

Due to the two cherry picked commits from wireless to wireless-next we have
several conflicts in mt76. To avoid any bugs with conflicts merge wireless into
wireless-next.

96f134dc1964 wifi: mt76: handle possible mt76_rx_token_consume failures
fe13dad8992b wifi: mt76: dma: do not increment queue head if mt76_dma_add_buf fails

1 files changed, 88 insertions, 2 deletions

diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h
index d657f2a42a7b..fd59f600094a 100644
--- a/include/linux/serial_core.h
+++ b/include/linux/serial_core.h
@@ -664,6 +664,86 @@ struct uart_driver {
 
 void uart_write_wakeup(struct uart_port *port);
 
+#define __uart_port_tx(uport, ch, tx_ready, put_char, tx_done, for_test,      \
+		for_post)						      \
+({									      \
+	struct uart_port *__port = (uport);				      \
+	struct circ_buf *xmit = &__port->state->xmit;			      \
+	unsigned int pending;						      \
+									      \
+	for (; (for_test) && (tx_ready); (for_post), __port->icount.tx++) {   \
+		if (__port->x_char) {					      \
+			(ch) = __port->x_char;				      \
+			(put_char);					      \
+			__port->x_char = 0;				      \
+			continue;					      \
+		}							      \
+									      \
+		if (uart_circ_empty(xmit) || uart_tx_stopped(__port))	      \
+			break;						      \
+									      \
+		(ch) = xmit->buf[xmit->tail];				      \
+		(put_char);						      \
+		xmit->tail = (xmit->tail + 1) % UART_XMIT_SIZE;		      \
+	}								      \
+									      \
+	(tx_done);							      \
+									      \
+	pending = uart_circ_chars_pending(xmit);			      \
+	if (pending < WAKEUP_CHARS) {					      \
+		uart_write_wakeup(__port);				      \
+									      \
+		if (pending == 0)					      \
+			__port->ops->stop_tx(__port);			      \
+	}								      \
+									      \
+	pending;							      \
+})
+
+/**
+ * uart_port_tx_limited -- transmit helper for uart_port with count limiting
+ * @port: uart port
+ * @ch: variable to store a character to be written to the HW
+ * @count: a limit of characters to send
+ * @tx_ready: can HW accept more data function
+ * @put_char: function to write a character
+ * @tx_done: function to call after the loop is done
+ *
+ * This helper transmits characters from the xmit buffer to the hardware using
+ * @put_char(). It does so until @count characters are sent and while @tx_ready
+ * evaluates to true.
+ *
+ * Returns: the number of characters in the xmit buffer when done.
+ *
+ * The expression in macro parameters shall be designed as follows:
+ *  * **tx_ready:** should evaluate to true if the HW can accept more data to
+ *    be sent. This parameter can be %true, which means the HW is always ready.
+ *  * **put_char:** shall write @ch to the device of @port.
+ *  * **tx_done:** when the write loop is done, this can perform arbitrary
+ *    action before potential invocation of ops->stop_tx() happens. If the
+ *    driver does not need to do anything, use e.g. ({}).
+ *
+ * For all of them, @port->lock is held, interrupts are locally disabled and
+ * the expressions must not sleep.
+ */
+#define uart_port_tx_limited(port, ch, count, tx_ready, put_char, tx_done) ({ \
+	unsigned int __count = (count);					      \
+	__uart_port_tx(port, ch, tx_ready, put_char, tx_done, __count,	      \
+			__count--);					      \
+})
+
+/**
+ * uart_port_tx -- transmit helper for uart_port
+ * @port: uart port
+ * @ch: variable to store a character to be written to the HW
+ * @tx_ready: can HW accept more data function
+ * @put_char: function to write a character
+ *
+ * See uart_port_tx_limited() for more details.
+ */
+#define uart_port_tx(port, ch, tx_ready, put_char)			\
+	__uart_port_tx(port, ch, tx_ready, put_char, ({}), true, ({}))
+
 /*
  * Baud rate helpers.
  */
@@ -743,9 +823,15 @@ static const bool earlycon_acpi_spcr_enable EARLYCON_USED_OR_UNUSED;
 static inline int setup_earlycon(char *buf) { return 0; }
 #endif
 
-static inline bool uart_console_enabled(struct uart_port *port)
+/* Variant of uart_console_registered() when the console_list_lock is held. */
+static inline bool uart_console_registered_locked(struct uart_port *port)
+{
+	return uart_console(port) && console_is_registered_locked(port->cons);
+}
+
+static inline bool uart_console_registered(struct uart_port *port)
 {
-	return uart_console(port) && (port->cons->flags & CON_ENABLED);
+	return uart_console(port) && console_is_registered(port->cons);
 }
 
 struct uart_port *uart_get_console(struct uart_port *ports, int nr,