AuxXxilium/linux_dsm_epyc7002
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net: atlantic: possible fault in transition to hibernation

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during hibernation freeze, aq_nic_stop could be invoked
on a stopped device. That may cause panic on access to
not yet allocated vector/ring structures.

Add a check to stop device if it is not yet stopped.

Similiarly after freeze in hibernation thaw, aq_nic_start
could be invoked on a not initialized net device.
Result will be the same.

Add a check to start device if it is initialized.
In our case, this is the same as started.

Fixes: 8aaa112a57 ("net: atlantic: refactoring pm logic")
Signed-off-by: Pavel Belous <pbelous@marvell.com>
Signed-off-by: Nikita Danilov <ndanilov@marvell.com>
Signed-off-by: Igor Russkikh <irusskikh@marvell.com>
Signed-off-by: Dmitry Bogdanov <dbogdanov@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Pavel Belous 2020-02-14 18:44:57 +03:00 committed by David S. Miller
parent 380ec5b9af
commit 52a22f4d6f
1 changed files with 8 additions and 5 deletions
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5
drivers/net/ethernet/aquantia/atlantic/aq_pci_func.c
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@ -359,6 +359,7 @@ static int aq_suspend_common(struct device *dev, bool deep)
netif_device_detach(nic->ndev);
netif_tx_stop_all_queues(nic->ndev);
if (netif_running(nic->ndev))
aq_nic_stop(nic);
if (deep) {
@ -375,7 +376,7 @@ static int atl_resume_common(struct device *dev, bool deep)
{
struct pci_dev *pdev = to_pci_dev(dev);
struct aq_nic_s *nic;
int ret;
int ret = 0;
nic = pci_get_drvdata(pdev);
@ -390,9 +391,11 @@ static int atl_resume_common(struct device *dev, bool deep)
goto err_exit;
}
if (netif_running(nic->ndev)) {
ret = aq_nic_start(nic);
if (ret)
goto err_exit;
}
netif_device_attach(nic->ndev);
netif_tx_start_all_queues(nic->ndev);