linux-kernel - [PATCH net-next v2 05/13] sunhme: Regularize probe errors

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Message-Id: <20220924015339.1816744-6-seanga2@gmail.com>
Date:   Fri, 23 Sep 2022 21:53:31 -0400
From:   Sean Anderson <seanga2@...il.com>
To:     "David S . Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>, netdev@...r.kernel.org
Cc:     Nick Bowler <nbowler@...conx.ca>,
        Rolf Eike Beer <eike-kernel@...tec.de>,
        Zheyu Ma <zheyuma97@...il.com>,
        linux-kernel@...r.kernel.org (open list),
        Sean Anderson <seanga2@...il.com>
Subject: [PATCH net-next v2 05/13] sunhme: Regularize probe errors

This fixes several error paths to ensure they return an appropriate error
(instead of ENODEV).

Signed-off-by: Sean Anderson <seanga2@...il.com>
---

Changes in v2:
- Set err inside error branches

 drivers/net/ethernet/sun/sunhme.c | 21 +++++++++++++--------
 1 file changed, 13 insertions(+), 8 deletions(-)

diff --git a/drivers/net/ethernet/sun/sunhme.c b/drivers/net/ethernet/sun/sunhme.c
index b0843210beb9..26b5e44a6f2e 100644
--- a/drivers/net/ethernet/sun/sunhme.c
+++ b/drivers/net/ethernet/sun/sunhme.c
@@ -2945,7 +2945,6 @@ static int happy_meal_pci_probe(struct pci_dev *pdev,
 	if (err)
 		goto err_out;
 	pci_set_master(pdev);
-	err = -ENODEV;
 
 	if (!strcmp(prom_name, "SUNW,qfe") || !strcmp(prom_name, "qfe")) {
 		qp = quattro_pci_find(pdev);
@@ -2963,9 +2962,10 @@ static int happy_meal_pci_probe(struct pci_dev *pdev,
 	}
 
 	dev = alloc_etherdev(sizeof(struct happy_meal));
-	err = -ENOMEM;
-	if (!dev)
+	if (!dev) {
+		err = -ENOMEM;
 		goto err_out;
+	}
 	SET_NETDEV_DEV(dev, &pdev->dev);
 
 	hp = netdev_priv(dev);
@@ -2982,18 +2982,22 @@ static int happy_meal_pci_probe(struct pci_dev *pdev,
 	}
 
 	hpreg_res = pci_resource_start(pdev, 0);
-	err = -ENODEV;
+	err = -EINVAL;
 	if ((pci_resource_flags(pdev, 0) & IORESOURCE_IO) != 0) {
 		printk(KERN_ERR "happymeal(PCI): Cannot find proper PCI device base address.\n");
 		goto err_out_clear_quattro;
 	}
-	if (pci_request_regions(pdev, DRV_NAME)) {
+
+	err = pci_request_regions(pdev, DRV_NAME);
+	if (err) {
 		printk(KERN_ERR "happymeal(PCI): Cannot obtain PCI resources, "
 		       "aborting.\n");
 		goto err_out_clear_quattro;
 	}
 
-	if ((hpreg_base = ioremap(hpreg_res, 0x8000)) == NULL) {
+	hpreg_base = ioremap(hpreg_res, 0x8000);
+	if (!hpreg_base) {
+		err = -ENOMEM;
 		printk(KERN_ERR "happymeal(PCI): Unable to remap card memory.\n");
 		goto err_out_free_res;
 	}
@@ -3063,9 +3067,10 @@ static int happy_meal_pci_probe(struct pci_dev *pdev,
 
 	hp->happy_block = dma_alloc_coherent(&pdev->dev, PAGE_SIZE,
 					     &hp->hblock_dvma, GFP_KERNEL);
-	err = -ENODEV;
-	if (!hp->happy_block)
+	if (!hp->happy_block) {
+		err = -ENOMEM;
 		goto err_out_iounmap;
+	}
 
 	hp->linkcheck = 0;
 	hp->timer_state = asleep;
-- 
2.37.1