lkml.org 
[lkml]   [2021]   [Dec]   [23]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH] can: xilinx_can: Check for error irq
Date
For the possible failure of the platform_get_irq(), the returned irq
could be error number and will finally cause the failure of the
request_irq().
Consider that platform_get_irq() can now in certain cases return
-EPROBE_DEFER, and the consequences of letting request_irq() effectively
convert that into -EINVAL, even at probe time rather than later on.
So it might be better to check just now.

Fixes: b1201e44f50b ("can: xilinx CAN controller support")
Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>
---
drivers/net/can/xilinx_can.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/net/can/xilinx_can.c b/drivers/net/can/xilinx_can.c
index 3b883e607d8b..a579b9b791ed 100644
--- a/drivers/net/can/xilinx_can.c
+++ b/drivers/net/can/xilinx_can.c
@@ -1762,7 +1762,12 @@ static int xcan_probe(struct platform_device *pdev)
spin_lock_init(&priv->tx_lock);

/* Get IRQ for the device */
- ndev->irq = platform_get_irq(pdev, 0);
+ ret = platform_get_irq(pdev, 0);
+ if (ret < 0)
+ goto err_free;
+
+ ndev->irq = ret;
+
ndev->flags |= IFF_ECHO; /* We support local echo */

platform_set_drvdata(pdev, ndev);
--
2.25.1
\
 
 \ /
  Last update: 2021-12-24 03:14    [W:0.040 / U:0.592 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site