From: Geert Uytterhoeven <geert+renesas@glider.be>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Jiri Slaby <jslaby@suse.com>
Cc: Wolfram Sang <wsa+renesas@sang-engineering.com>,
Ulrich Hecht <uli+renesas@fpond.eu>,
Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>,
Simon Horman <horms@verge.net.au>,
Yoshinori Sato <ysato@users.sourceforge.jp>,
linux-serial@vger.kernel.org, linux-renesas-soc@vger.kernel.org,
linux-sh@vger.kernel.org,
Geert Uytterhoeven <geert+renesas@glider.be>
Subject: [PATCH v5 2/4] serial: sh-sci: Extract sci_dma_rx_reenable_irq()
Date: Mon, 7 Jan 2019 17:23:18 +0100 [thread overview]
Message-ID: <20190107162320.15530-3-geert+renesas@glider.be> (raw)
In-Reply-To: <20190107162320.15530-1-geert+renesas@glider.be>
Extract the functionality to direct new serial port interrupts back to
the CPU into its own helper, to prepare for using it from a second
callsite.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
---
v5:
- New.
---
drivers/tty/serial/sh-sci.c | 23 +++++++++++++++--------
1 file changed, 15 insertions(+), 8 deletions(-)
diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c
index 4c75468680cb547d..4d814c30c4189b56 100644
--- a/drivers/tty/serial/sh-sci.c
+++ b/drivers/tty/serial/sh-sci.c
@@ -1274,6 +1274,20 @@ static void start_hrtimer_us(struct hrtimer *hrt, unsigned long usec)
hrtimer_start(hrt, t, HRTIMER_MODE_REL);
}
+static void sci_dma_rx_reenable_irq(struct sci_port *s)
+{
+ struct uart_port *port = &s->port;
+ u16 scr;
+
+ /* Direct new serial port interrupts back to CPU */
+ scr = serial_port_in(port, SCSCR);
+ if (port->type == PORT_SCIFA || port->type == PORT_SCIFB) {
+ scr &= ~SCSCR_RDRQE;
+ enable_irq(s->irqs[SCIx_RXI_IRQ]);
+ }
+ serial_port_out(port, SCSCR, scr | SCSCR_RIE);
+}
+
static void sci_dma_rx_complete(void *arg)
{
struct sci_port *s = arg;
@@ -1453,7 +1467,6 @@ static enum hrtimer_restart rx_timer_fn(struct hrtimer *t)
unsigned long flags;
unsigned int read;
int active, count;
- u16 scr;
dev_dbg(port->dev, "DMA Rx timed out\n");
@@ -1503,13 +1516,7 @@ static enum hrtimer_restart rx_timer_fn(struct hrtimer *t)
if (port->type == PORT_SCIFA || port->type == PORT_SCIFB)
sci_submit_rx(s, true);
- /* Direct new serial port interrupts back to CPU */
- scr = serial_port_in(port, SCSCR);
- if (port->type == PORT_SCIFA || port->type == PORT_SCIFB) {
- scr &= ~SCSCR_RDRQE;
- enable_irq(s->irqs[SCIx_RXI_IRQ]);
- }
- serial_port_out(port, SCSCR, scr | SCSCR_RIE);
+ sci_dma_rx_reenable_irq(s);
spin_unlock_irqrestore(&port->lock, flags);
--
2.17.1
next prev parent reply other threads:[~2019-01-07 16:23 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-01-07 16:23 [PATCH v5 0/4] serial: sh-sci: Fix fallback to PIO on DMA failure Geert Uytterhoeven
2019-01-07 16:23 ` [PATCH v5 1/4] serial: sh-sci: Extract sci_dma_rx_chan_invalidate() Geert Uytterhoeven
2019-01-08 14:42 ` Simon Horman
2019-01-09 12:47 ` Ulrich Hecht
2019-01-07 16:23 ` Geert Uytterhoeven [this message]
2019-01-08 14:46 ` [PATCH v5 2/4] serial: sh-sci: Extract sci_dma_rx_reenable_irq() Simon Horman
2019-01-09 12:48 ` Ulrich Hecht
2019-01-07 16:23 ` [PATCH v5 3/4] serial: sh-sci: Fix fallback to PIO in sci_dma_rx_complete() Geert Uytterhoeven
2019-01-08 14:48 ` Simon Horman
2019-01-09 12:51 ` Ulrich Hecht
2019-01-07 16:23 ` [PATCH v5 4/4] serial: sh-sci: Make RX/TX DMA function names consistent Geert Uytterhoeven
2019-01-08 14:48 ` Simon Horman
2019-01-09 14:42 ` Ulrich Hecht
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