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| author | Jason Gunthorpe <jgunthorpe@obsidianresearch.com> | 2013-11-26 22:27:28 +0400 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2013-11-26 22:27:28 +0400 |
| commit | f407dae76040c9529c2c83b1488dda4ffc54522c (patch) | |
| tree | fea9a97fe2f06fdc3ec5ee6bbf19edfe211a7949 /drivers/pci | |
| parent | ecf61c78bd787b9dfb4a6b1dfb7561c2a95c5c17 (diff) | |
| download | linux-f407dae76040c9529c2c83b1488dda4ffc54522c.tar.xz | |
PCI: mvebu: Return 'unsupported' for Interrupt Line and Interrupt Pin
The emulated bridge does not support interrupts, so it should return the
value 0 for Interrupt Line and Interrupt Pin. This indicates that
interrupts are not supported.
Since Max_Lat and Min_Gnt are also in the same 32-bit word, we return
0 for them, which means "do not care."
This corrects an error message from the kernel:
pci 0000:00:01.0: of_irq_parse_pci() failed with rc=135
Which is due to the default return of 0xFFFFFFFF indicating that
interrupts are supported.
The error message regression was caused by 16b84e5a505 ("of/irq: Create
of_irq_parse_and_map_pci() to consolidate arch code.")
Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Jason Cooper <jason@lakedaemon.net>
Diffstat (limited to 'drivers/pci')
| -rw-r--r-- | drivers/pci/host/pci-mvebu.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/pci/host/pci-mvebu.c b/drivers/pci/host/pci-mvebu.c index c269e430c760..2aa7b77c7c88 100644 --- a/drivers/pci/host/pci-mvebu.c +++ b/drivers/pci/host/pci-mvebu.c @@ -447,6 +447,11 @@ static int mvebu_sw_pci_bridge_read(struct mvebu_pcie_port *port, *value = 0; break; + case PCI_INTERRUPT_LINE: + /* LINE PIN MIN_GNT MAX_LAT */ + *value = 0; + break; + default: *value = 0xffffffff; return PCIBIOS_BAD_REGISTER_NUMBER; |