diff options
| author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2014-10-03 15:13:24 +1000 |
|---|---|---|
| committer | Luis Henriques <luis.henriques@canonical.com> | 2014-12-10 17:15:17 +0000 |
| commit | 5e1989e302636b4f7d05054c58304640faf274b0 (patch) | |
| tree | 8b72f6325edbf55c9a2041c01dda157491d88bc0 /include/linux | |
| parent | 59687820094bd76d8d4867fd8cd5d4269155d5a3 (diff) | |
PCI/MSI: Add device flag indicating that 64-bit MSIs don't work
commit f144d1496b47e7450f41b767d0d91c724c2198bc upstream.
This can be set by quirks/drivers to be used by the architecture code
that assigns the MSI addresses.
We additionally add verification in the core MSI code that the values
assigned by the architecture do satisfy the limitation in order to fail
gracefully if they don't (ie. the arch hasn't been updated to deal with
that quirk yet).
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
[ luis: backported to 3.16: adjusted context ]
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/pci.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/pci.h b/include/linux/pci.h index 97fe7ebf2e25..04fdc409eec6 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -331,6 +331,7 @@ struct pci_dev { unsigned int is_added:1; unsigned int is_busmaster:1; /* device is busmaster */ unsigned int no_msi:1; /* device may not use msi */ + unsigned int no_64bit_msi:1; /* device may only use 32-bit MSIs */ unsigned int block_cfg_access:1; /* config space access is blocked */ unsigned int broken_parity_status:1; /* Device generates false positive parity */ unsigned int irq_reroute_variant:2; /* device needs IRQ rerouting variant */ |