71 lines
2.3 KiB
Diff
71 lines
2.3 KiB
Diff
From: Jiri Benc <jbenc@suse.cz>
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Subject: Enable igb as entropy source (disabled by default)
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References: FATE#307517
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Patch-mainline: never
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Current disk-less systems have no entropy source whatsoever. Therefore, the
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network drivers tg3, bnx2, e1000, e1000e, igb and ixgbe should be enabled to
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feed entropy to the kernel via the IRQF_SAMPLE_RANDOM flag when loaded. This
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option shall not be enabled by default but implemented via a module option to
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be activated by the administrator.
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Signed-off-by: Brandon Philips <bphilips@suse.de>
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---
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drivers/net/igb/igb_main.c | 16 +++++++++++++---
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1 file changed, 13 insertions(+), 3 deletions(-)
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--- a/drivers/net/igb/igb_main.c
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+++ b/drivers/net/igb/igb_main.c
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@@ -60,6 +60,10 @@ static const struct e1000_info *igb_info
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[board_82575] = &e1000_82575_info,
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};
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+static int entropy = 0;
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+module_param(entropy, int, 0);
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+MODULE_PARM_DESC(entropy, "Allow igb to populate the /dev/random entropy pool");
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+
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static DEFINE_PCI_DEVICE_TABLE(igb_pci_tbl) = {
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{ PCI_VDEVICE(INTEL, E1000_DEV_ID_82580_COPPER), board_82575 },
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{ PCI_VDEVICE(INTEL, E1000_DEV_ID_82580_FIBER), board_82575 },
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@@ -587,7 +591,8 @@ static int igb_request_msix(struct igb_a
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int i, err = 0, vector = 0;
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err = request_irq(adapter->msix_entries[vector].vector,
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- igb_msix_other, 0, netdev->name, adapter);
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+ igb_msix_other, entropy ? IRQF_SAMPLE_RANDOM : 0,
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+ netdev->name, adapter);
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if (err)
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goto out;
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vector++;
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@@ -882,6 +887,10 @@ static int igb_request_irq(struct igb_ad
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struct net_device *netdev = adapter->netdev;
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struct pci_dev *pdev = adapter->pdev;
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int err = 0;
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+ int irq_flags = 0;
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+
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+ if (entropy)
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+ irq_flags = IRQF_SAMPLE_RANDOM;
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if (adapter->msix_entries) {
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err = igb_request_msix(adapter);
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@@ -916,7 +925,7 @@ static int igb_request_irq(struct igb_ad
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}
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if (adapter->flags & IGB_FLAG_HAS_MSI) {
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- err = request_irq(adapter->pdev->irq, igb_intr_msi, 0,
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+ err = request_irq(adapter->pdev->irq, igb_intr_msi, irq_flags,
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netdev->name, adapter);
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if (!err)
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goto request_done;
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@@ -926,7 +935,8 @@ static int igb_request_irq(struct igb_ad
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adapter->flags &= ~IGB_FLAG_HAS_MSI;
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}
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- err = request_irq(adapter->pdev->irq, igb_intr, IRQF_SHARED,
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+ irq_flags |= IRQF_SHARED;
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+ err = request_irq(adapter->pdev->irq, igb_intr, irq_flags,
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netdev->name, adapter);
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if (err)
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