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| author | Bjorn Helgaas <bhelgaas@google.com> | 2012-06-16 14:40:22 -0600 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2012-06-16 14:40:22 -0600 |
| commit | fbebb9fd22581b6422d60669c4ff86ce99d6cdba (patch) | |
| tree | f7063ec22814ee7782d1ccdb6f8653404d6714c8 /drivers/pci/pci.c | |
| parent | cfaf025112d3856637ff34a767ef785ef5cf2ca9 (diff) | |
| download | olio-linux-3.10-fbebb9fd22581b6422d60669c4ff86ce99d6cdba.tar.xz olio-linux-3.10-fbebb9fd22581b6422d60669c4ff86ce99d6cdba.zip | |
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/pci.c')
| -rw-r--r-- | drivers/pci/pci.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index 447e83472c0..9ae517a6836 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -2876,6 +2876,9 @@ bool pci_intx_mask_supported(struct pci_dev *dev) bool mask_supported = false; u16 orig, new; + if (dev->broken_intx_masking) + return false; + pci_cfg_access_lock(dev); pci_read_config_word(dev, PCI_COMMAND, &orig); |