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

Jan 04, 2010 1 Replies
M

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


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S

Hi Mahender.

core

You need to use the IRQ number from the struct pci_dev you get back from pci_get_device() rather than directly reading the config register. You should also use this for the card addresses too (resource[].start) rather than reading the BAR registers directly.

Regards, Steve

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