lkml.org 
[lkml]   [2021]   [Dec]   [21]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH] serial: mps2-uart: Check for error irq
Date
I find that platform_get_irq() will not always succeed.
It will return error irq in case there is no suitable irq.
Therefore, it might be better to check it if order to avoid the use of
error irq.

Fixes: 041f031def33 ("serial: mps2-uart: add MPS2 UART driver")
Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>
---
drivers/tty/serial/mps2-uart.c | 10 ++++++++++
1 file changed, 10 insertions(+)

diff --git a/drivers/tty/serial/mps2-uart.c b/drivers/tty/serial/mps2-uart.c
index 587b42f754cb..117d9896051f 100644
--- a/drivers/tty/serial/mps2-uart.c
+++ b/drivers/tty/serial/mps2-uart.c
@@ -585,10 +585,20 @@ static int mps2_init_port(struct platform_device *pdev,

if (mps_port->flags & UART_PORT_COMBINED_IRQ) {
mps_port->port.irq = platform_get_irq(pdev, 0);
+ if (mps_port->port.irq < 0)
+ return mps_port->port.irq;
} else {
mps_port->rx_irq = platform_get_irq(pdev, 0);
+ if (mps_port->rx_irq < 0)
+ return mps_port->rx_irq;
+
mps_port->tx_irq = platform_get_irq(pdev, 1);
+ if (mps_port->tx_irq < 0)
+ return mps_port->tx_irq;
+
mps_port->port.irq = platform_get_irq(pdev, 2);
+ if (mps_port->port.irq < 0)
+ return mps_port->port.irq;
}

return ret;
--
2.25.1
\
 
 \ /
  Last update: 2021-12-22 04:36    [W:0.034 / U:0.264 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site