From ec8bcefc637d475c93709fa559449991243c5c34 Mon Sep 17 00:00:00 2001
From: Valentin Caron <valentin.caron@foss.st.com>
Date: Tue, 8 Aug 2023 18:19:03 +0200
Subject: [PATCH] serial: stm32: modify parameter and rename
 stm32_usart_rx_dma_enabled

References: bsc#1214683 (PREEMPT_RT prerequisite backports)
Patch-mainline: v6.6-rc1
Git-commit: 00d1f9c6af0d4c8b1ae8b9aecbd8aa6295b4abf2

Rename stm32_usart_rx_dma_enabled to stm32_usart_rx_dma_started in order
to match with stm32_usart_tx_dma_started.

Modify argument of stm32_usart_rx_dma_started from uart_port structure to
stm32_port structure to match with stm32_usart_tx_dma_started.

Signed-off-by: Valentin Caron <valentin.caron@foss.st.com>
Link: https://lore.kernel.org/r/20230808161906.178996-4-valentin.caron@foss.st.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Mel Gorman <mgorman@suse.de>
---
 drivers/tty/serial/stm32-usart.c | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/drivers/tty/serial/stm32-usart.c b/drivers/tty/serial/stm32-usart.c
index a75892980bb8..9d9b221a6f45 100644
--- a/drivers/tty/serial/stm32-usart.c
+++ b/drivers/tty/serial/stm32-usart.c
@@ -285,9 +285,9 @@ static int stm32_usart_init_rs485(struct uart_port *port,
 	return uart_get_rs485_mode(port);
 }
 
-static bool stm32_usart_rx_dma_enabled(struct uart_port *port)
+static bool stm32_usart_rx_dma_started(struct stm32_port *stm32_port)
 {
-	struct stm32_port *stm32_port = to_stm32_port(port);
+	struct uart_port *port = &stm32_port->port;
 	const struct stm32_usart_offsets *ofs = &stm32_port->info->ofs;
 
 	if (!stm32_port->rx_ch)
@@ -306,7 +306,7 @@ static bool stm32_usart_pending_rx_pio(struct uart_port *port, u32 *sr)
 	/* Get pending characters in RDR or FIFO */
 	if (*sr & USART_SR_RXNE) {
 		/* Get all pending characters from the RDR or the FIFO when using interrupts */
-		if (!stm32_usart_rx_dma_enabled(port))
+		if (!stm32_usart_rx_dma_started(stm32_port))
 			return true;
 
 		/* Handle only RX data errors when using DMA */
@@ -451,7 +451,7 @@ static unsigned int stm32_usart_receive_chars(struct uart_port *port, bool force
 	u32 sr;
 	unsigned int size = 0;
 
-	if (stm32_usart_rx_dma_enabled(port) || force_dma_flush) {
+	if (stm32_usart_rx_dma_started(stm32_port) || force_dma_flush) {
 		rx_dma_status = dmaengine_tx_status(stm32_port->rx_ch,
 						    stm32_port->rx_ch->cookie,
 						    &stm32_port->rx_dma_state);
@@ -785,8 +785,8 @@ static irqreturn_t stm32_usart_interrupt(int irq, void *ptr)
 	 * line has been masked by HW and rx data are stacking in FIFO.
 	 */
 	if (!stm32_port->throttled) {
-		if (((sr & USART_SR_RXNE) && !stm32_usart_rx_dma_enabled(port)) ||
-		    ((sr & USART_SR_ERR_MASK) && stm32_usart_rx_dma_enabled(port))) {
+		if (((sr & USART_SR_RXNE) && !stm32_usart_rx_dma_started(stm32_port)) ||
+		    ((sr & USART_SR_ERR_MASK) && stm32_usart_rx_dma_started(stm32_port))) {
 			spin_lock(&port->lock);
 			size = stm32_usart_receive_chars(port, false);
 			uart_unlock_and_check_sysrq(port);
@@ -802,7 +802,7 @@ static irqreturn_t stm32_usart_interrupt(int irq, void *ptr)
 	}
 
 	/* Receiver timeout irq for DMA RX */
-	if (stm32_usart_rx_dma_enabled(port) && !stm32_port->throttled) {
+	if (stm32_usart_rx_dma_started(stm32_port) && !stm32_port->throttled) {
 		spin_lock(&port->lock);
 		size = stm32_usart_receive_chars(port, false);
 		uart_unlock_and_check_sysrq(port);
@@ -902,7 +902,7 @@ static void stm32_usart_throttle(struct uart_port *port)
 	 * Disable DMA request line if enabled, so the RX data gets queued into the FIFO.
 	 * Hardware flow control is triggered when RX FIFO is full.
 	 */
-	if (stm32_usart_rx_dma_enabled(port))
+	if (stm32_usart_rx_dma_started(stm32_port))
 		stm32_usart_clr_bits(port, ofs->cr3, USART_CR3_DMAR);
 
 	stm32_usart_clr_bits(port, ofs->cr1, stm32_port->cr1_irq);