From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrey Smirnov Subject: [PATCH 04/24] tty: serial: fsl_lpuart: Simplify RX/TX IRQ handlers Date: Mon, 29 Jul 2019 12:52:06 -0700 Message-ID: <20190729195226.8862-5-andrew.smirnov@gmail.com> References: <20190729195226.8862-1-andrew.smirnov@gmail.com> Mime-Version: 1.0 Content-Transfer-Encoding: 8bit Return-path: In-Reply-To: <20190729195226.8862-1-andrew.smirnov@gmail.com> Sender: linux-kernel-owner@vger.kernel.org To: linux-serial@vger.kernel.org Cc: Andrey Smirnov , Stefan Agner , Bhuvanchandra DV , Chris Healy , Cory Tusar , Lucas Stach , Greg Kroah-Hartman , Jiri Slaby , linux-imx@nxp.com, linux-kernel@vger.kernel.org List-Id: linux-serial@vger.kernel.org It appears that lpuart_rxint, lpuart_txint and lpuart32_rxint were modelled after identical function found in UART driver for i.MX. However, while said functions are used as individual IRQ handlers in i.MX driver (in case of i.MX1), it is not the case for LPUART. Given that, there's no need for us to restrict the prototype of the handler to irqreturn_t foo(int, void *) and we can drop all of uneened boilerplate code by changing it void foo(struct lpuart_port *). Signed-off-by: Andrey Smirnov Cc: Stefan Agner Cc: Bhuvanchandra DV Cc: Chris Healy Cc: Cory Tusar Cc: Lucas Stach Cc: Greg Kroah-Hartman Cc: Jiri Slaby Cc: linux-imx@nxp.com Cc: linux-serial@vger.kernel.org Cc: linux-kernel@vger.kernel.org --- drivers/tty/serial/fsl_lpuart.c | 20 +++++++------------- 1 file changed, 7 insertions(+), 13 deletions(-) diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c index 56423ad02f0f..3e38970a444e 100644 --- a/drivers/tty/serial/fsl_lpuart.c +++ b/drivers/tty/serial/fsl_lpuart.c @@ -770,9 +770,8 @@ static unsigned int lpuart32_tx_empty(struct uart_port *port) return 0; } -static irqreturn_t lpuart_txint(int irq, void *dev_id) +static void lpuart_txint(struct lpuart_port *sport) { - struct lpuart_port *sport = dev_id; struct circ_buf *xmit = &sport->port.state->xmit; unsigned long flags; @@ -803,12 +802,10 @@ static irqreturn_t lpuart_txint(int irq, void *dev_id) out: spin_unlock_irqrestore(&sport->port.lock, flags); - return IRQ_HANDLED; } -static irqreturn_t lpuart_rxint(int irq, void *dev_id) +static void lpuart_rxint(struct lpuart_port *sport) { - struct lpuart_port *sport = dev_id; unsigned int flg, ignored = 0, overrun = 0; struct tty_port *port = &sport->port.state->port; unsigned long flags; @@ -877,12 +874,10 @@ static irqreturn_t lpuart_rxint(int irq, void *dev_id) spin_unlock_irqrestore(&sport->port.lock, flags); tty_flip_buffer_push(port); - return IRQ_HANDLED; } -static irqreturn_t lpuart32_rxint(int irq, void *dev_id) +static void lpuart32_rxint(struct lpuart_port *sport) { - struct lpuart_port *sport = dev_id; unsigned int flg, ignored = 0; struct tty_port *port = &sport->port.state->port; unsigned long flags; @@ -941,7 +936,6 @@ static irqreturn_t lpuart32_rxint(int irq, void *dev_id) spin_unlock_irqrestore(&sport->port.lock, flags); tty_flip_buffer_push(port); - return IRQ_HANDLED; } static irqreturn_t lpuart_int(int irq, void *dev_id) @@ -952,10 +946,10 @@ static irqreturn_t lpuart_int(int irq, void *dev_id) sts = readb(sport->port.membase + UARTSR1); if (sts & UARTSR1_RDRF) - lpuart_rxint(irq, dev_id); + lpuart_rxint(sport); if (sts & UARTSR1_TDRE) - lpuart_txint(irq, dev_id); + lpuart_txint(sport); return IRQ_HANDLED; } @@ -970,10 +964,10 @@ static irqreturn_t lpuart32_int(int irq, void *dev_id) rxcount = rxcount >> UARTWATER_RXCNT_OFF; if ((sts & UARTSTAT_RDRF || rxcount > 0) && !sport->lpuart_dma_rx_use) - lpuart32_rxint(irq, dev_id); + lpuart32_rxint(sport); if ((sts & UARTSTAT_TDRE) && !sport->lpuart_dma_tx_use) - lpuart_txint(irq, dev_id); + lpuart_txint(sport); lpuart32_write(&sport->port, sts, UARTSTAT); return IRQ_HANDLED; -- 2.21.0