Re: [PATCH net 1/2] net: tehuti: Fix a missing pci_disable_msi() in the error handling path of bdx_probe()

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Le 28/02/2024 à 10:51, Jiri Pirko a écrit :
Tue, Feb 27, 2024 at 09:50:55PM CET, christophe.jaillet@xxxxxxxxxx wrote:
If an error occurs after a successful call to pci_enable_msi(),
pci_disable_msi() should be called as already done in the remove function.

Add a new label and the missing pci_disable_msi() call.

Fixes: 1a348ccc1047 ("[NET]: Add Tehuti network driver.")
Signed-off-by: Christophe JAILLET <christophe.jaillet@xxxxxxxxxx>
---
Compile tested only.
---
drivers/net/ethernet/tehuti/tehuti.c | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/tehuti/tehuti.c b/drivers/net/ethernet/tehuti/tehuti.c
index ca409515ead5..938a5caf5a3b 100644
--- a/drivers/net/ethernet/tehuti/tehuti.c
+++ b/drivers/net/ethernet/tehuti/tehuti.c
@@ -1965,7 +1965,7 @@ bdx_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
		ndev = alloc_etherdev(sizeof(struct bdx_priv));
		if (!ndev) {
			err = -ENOMEM;
-			goto err_out_iomap;
+			goto err_out_disable_msi;
		}

		ndev->netdev_ops = &bdx_netdev_ops;
@@ -2031,7 +2031,7 @@ bdx_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
		if (bdx_read_mac(priv)) {
			pr_err("load MAC address failed\n");
			err = -EFAULT;
-			goto err_out_iomap;
+			goto err_out_disable_msi;
		}
		SET_NETDEV_DEV(ndev, &pdev->dev);
		err = register_netdev(ndev);
@@ -2048,6 +2048,11 @@ bdx_probe(struct pci_dev *pdev, const struct pci_device_id *ent)

err_out_free:
	free_netdev(ndev);
+err_out_disable_msi:
+#ifdef BDX_MSI

ifdef does not seem to be necessary here. The irq_type check should be
enough.

I thought about removing it, but I left it because it how it is done in the remove function.

I'll send a v2 without the ifdef and will also add another patch to remove it as well from the remove function.

CJ


pw-bot: cr


+	if (nic->irq_type == IRQ_MSI)
+		pci_disable_msi(pdev);
+#endif
err_out_iomap:
	iounmap(nic->regs);
err_out_res:
--
2.43.2









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