Revert "drivers/net/ethernet/neterion/vxge: Fix a use-after-free bug in vxge-main.c"

This reverts commit 8fc74d18639a2402ca52b177e990428e26ea881f.

BAR0 is the main (only?) register bank for this device. We most
obviously can't unmap it before the netdev is unregistered.
This was pointed out in review but the patch got reposted and
merged, anyway.

The author of the patch was only testing it with a QEMU model,
which I presume does not emulate enough for the netdev to be brought
up (author's replies are not visible in lore because they kept sending
their emails in HTML).

Link: https://lore.kernel.org/all/20220616085059.680dc215@kernel.org/
Fixes: 8fc74d18639a ("drivers/net/ethernet/neterion/vxge: Fix a use-after-free bug in vxge-main.c")
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/neterion/vxge/vxge-main.c b/drivers/net/ethernet/neterion/vxge/vxge-main.c
index 092fd0a..fa5d4dd 100644 (file)
--- a/drivers/net/ethernet/neterion/vxge/vxge-main.c
+++ b/drivers/net/ethernet/neterion/vxge/vxge-main.c
@@ -4736,10 +4736,10 @@ static void vxge_remove(struct pci_dev *pdev)
        for (i = 0; i < vdev->no_of_vpath; i++)
                vxge_free_mac_add_list(&vdev->vpaths[i]);
 
-       iounmap(vdev->bar0);
        vxge_device_unregister(hldev);
        /* Do not call pci_disable_sriov here, as it will break child devices */
        vxge_hw_device_terminate(hldev);
+       iounmap(vdev->bar0);
        pci_release_region(pdev, 0);
        pci_disable_device(pdev);
        driver_config->config_dev_cnt--;