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authorBjorn Helgaas <bhelgaas@google.com>2012-06-16 14:40:22 -0600
committerBjorn Helgaas <bhelgaas@google.com>2012-06-16 14:40:22 -0600
commitfbebb9fd22581b6422d60669c4ff86ce99d6cdba (patch)
treef7063ec22814ee7782d1ccdb6f8653404d6714c8 /drivers/pci/quirks.c
parentcfaf025112d3856637ff34a767ef785ef5cf2ca9 (diff)
PCI: add infrastructure for devices with broken INTx masking
pci_intx_mask_supported() assumes INTx masking is supported if the PCI_COMMAND_INTX_DISABLE bit is writable. But when that bit is set, some devices don't actually mask INTx or update PCI_STATUS_INTERRUPT as we expect. This patch adds a way for quirks to identify these broken devices. [bhelgaas: split out from Chelsio quirk addition] Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'drivers/pci/quirks.c')
-rw-r--r--drivers/pci/quirks.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index 2a7521677541..cc13415416d7 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -2929,6 +2929,16 @@ static void __devinit disable_igfx_irq(struct pci_dev *dev)
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x0102, disable_igfx_irq);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x010a, disable_igfx_irq);
+/*
+ * Some devices may pass our check in pci_intx_mask_supported if
+ * PCI_COMMAND_INTX_DISABLE works though they actually do not properly
+ * support this feature.
+ */
+static void __devinit quirk_broken_intx_masking(struct pci_dev *dev)
+{
+ dev->broken_intx_masking = 1;
+}
+
static void pci_do_fixups(struct pci_dev *dev, struct pci_fixup *f,
struct pci_fixup *end)
{