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bnx2x: Don't release PCI bars on shutdown

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The bnx2x driver in its pci shutdown() callback releases its pci bars (in the
same manner it does during its pci remove() callback).
During a system reboot while VFs are enabled, its possible for the VF's remove
to be called (as a result of pci_disable_sriov()) after its shutdown callback
has already finished running; This will cause a paging request fault as the VF
tries to access the pci bar which it has previously released, crashing the
system.

This patch further differentiates the shutdown and remove callbacks, preventing the
pci release procedures from being called during shutdown.

Signed-off-by: Yuval Mintz <yuvalmin@broadcom.com>
Signed-off-by: Ariel Elior <ariele@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Yuval Mintz 2014-01-15 12:05:30 +02:00 committed by David S. Miller
parent a926592f5e
commit d9aee591b0
1 changed files with 15 additions and 14 deletions
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29
drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c
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@ -12942,25 +12942,26 @@ static void __bnx2x_remove(struct pci_dev *pdev,
pci_set_power_state(pdev, PCI_D3hot);
}
if (bp->regview)
iounmap(bp->regview);
if (remove_netdev) {
if (bp->regview)
iounmap(bp->regview);
/* for vf doorbells are part of the regview and were unmapped along with
* it. FW is only loaded by PF.
*/
if (IS_PF(bp)) {
if (bp->doorbells)
iounmap(bp->doorbells);
/* For vfs, doorbells are part of the regview and were unmapped
* along with it. FW is only loaded by PF.
*/
if (IS_PF(bp)) {
if (bp->doorbells)
iounmap(bp->doorbells);
bnx2x_release_firmware(bp);
}
bnx2x_free_mem_bp(bp);
bnx2x_release_firmware(bp);
}
bnx2x_free_mem_bp(bp);
if (remove_netdev)
free_netdev(dev);
if (atomic_read(&pdev->enable_cnt) == 1)
pci_release_regions(pdev);
if (atomic_read(&pdev->enable_cnt) == 1)
pci_release_regions(pdev);
}
pci_disable_device(pdev);
}