netdev - [PATCH net] net: ll_temac: fix error checking of irq_of_parse_and

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date: Mon, 31 Jul 2023 10:42:32 +0300
From: Dan Carpenter <dan.carpenter@...aro.org>
To: Esben Haabendal <esben@...nix.com>
Cc: "David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	Michal Simek <michal.simek@....com>,
	Harini Katakam <harini.katakam@....com>,
	Haoyue Xu <xuhaoyue1@...ilicon.com>,
	huangjunxian <huangjunxian6@...ilicon.com>,
	Yang Yingliang <yangyingliang@...wei.com>,
	Rob Herring <robh@...nel.org>, netdev@...r.kernel.org,
	kernel-janitors@...r.kernel.org
Subject: [PATCH net] net: ll_temac: fix error checking of
 irq_of_parse_and_map()

Most kernel functions return negative error codes but some irq functions
return zero on error.  In this code irq_of_parse_and_map(), returns zero
and platform_get_irq() returns negative error codes.  We need to handle
both cases appropriately.

Fixes: 8425c41d1ef7 ("net: ll_temac: Extend support to non-device-tree platforms")
Signed-off-by: Dan Carpenter <dan.carpenter@...aro.org>
---
 drivers/net/ethernet/xilinx/ll_temac_main.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/xilinx/ll_temac_main.c b/drivers/net/ethernet/xilinx/ll_temac_main.c
index e0ac1bcd9925..49f303353ecb 100644
--- a/drivers/net/ethernet/xilinx/ll_temac_main.c
+++ b/drivers/net/ethernet/xilinx/ll_temac_main.c
@@ -1567,12 +1567,16 @@ static int temac_probe(struct platform_device *pdev)
 	}
 
 	/* Error handle returned DMA RX and TX interrupts */
-	if (lp->rx_irq < 0)
-		return dev_err_probe(&pdev->dev, lp->rx_irq,
+	if (lp->rx_irq <= 0) {
+		rc = lp->rx_irq ?: -EINVAL;
+		return dev_err_probe(&pdev->dev, rc,
 				     "could not get DMA RX irq\n");
-	if (lp->tx_irq < 0)
-		return dev_err_probe(&pdev->dev, lp->tx_irq,
+	}
+	if (lp->tx_irq <= 0) {
+		rc = lp->tx_irq ?: -EINVAL;
+		return dev_err_probe(&pdev->dev, rc,
 				     "could not get DMA TX irq\n");
+	}
 
 	if (temac_np) {
 		/* Retrieve the MAC address */
-- 
2.39.2