Re: PCI IRQ initialisation in pci.c

Martin Mares (mj@ucw.cz)
Wed, 4 Aug 1999 19:24:58 +0200


Hello,

> After having problems with interrutpts after enabling USB support
> I configured one of the PCI devices to use a different IRQ
> with "setpci -v -s5.0 62.b=9". Unfortunately this breaks the
> FIR (toshoboe) driver since pci_find_device() returns a pci_dev
> structure with the IRQ that was found at pci.c initialisation.
>
> Wouldn't it be more correct for volatile PCI registers to be
> read at driver initialisation time rather than PCI subsystem
> initialisation? Perhaps in pci_find_device().

I'll probably introduce an ioctl for setting of these kernel
structures on a live system.

By the way, what interrupt problems do you exactly have? Unless
there is a hardware bug or something rotten in the drivers, interrupt
sharing should work fine on PCI.

Have a nice fortnight

-- 
Martin `MJ' Mares   <mj@ucw.cz>   http://atrey.karlin.mff.cuni.cz/~mj/
Faculty of Math and Physics, Charles University, Prague, Czech Rep., Earth
"For every complex problem, there's a solution that is simple, neat and wrong."

- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.rutgers.edu Please read the FAQ at http://www.tux.org/lkml/