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IRQ assigning for PCI card in SMP linux system ( Dual core )

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mahi

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Jan 4, 2010, 4:39:54 AM1/4/10
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Hi All,

For my PCI card i can able to read the IRQ line in single core
system, using PCI_INTERRUPT_LINE.And using that IRQ line i am getting
Interrupts

But on SMP systems, i can albe to read IRQ line but i am not getting
Interrupts.....because...
the assigned IRQ is not equal to which i have requested.

if i type "lspci -vvx" i am getting another IRQ Line , which is not
equal to read IRQ. ..........So please help how do i get the Exact IRQ
number without looking at "lspci -vvx" on SMP systems.

Thanks in Advance,
Mahender Reddy

Chris Cox

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Jan 6, 2010, 10:08:47 AM1/6/10
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I'm not an expert at this, but you may have to do something like
pci=noacpi (or perhaps another option, see the kernel documentation)
at boot to preserve the irq mapping you may have done in the bios.

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