Re: 2.6.8-rc1 and before: IO-APIC + DRI + RTL8139 = Disabling Ethernet IRQ

[Francois Romieu <romieu@fr.zoreil.com>]

Auzanneau Gregory <greg@reolight.net> :
[...]
> [drm] Loading R200 Microcode
> irq 19: nobody cared!
>  [<c010732a>] __report_bad_irq+0x2a/0x8b
>  [<c0107414>] note_interrupt+0x6f/0x9f
>  [<c0107732>] do_IRQ+0x161/0x192
>  [<c0105a00>] common_interrupt+0x18/0x20
> handlers:
> [<c0245383>] (rtl8139_interrupt+0x0/0x207)
> Disabling IRQ #19
> 
> For the moment I can disabling IO-ACPI, but I'm thinking to change my
> processor with an processor w/HT. So IO-ACPI is enabling by default.
> 
> How solve that ?

Shot in the dark (+ quick look into drivers/char/drm):

drivers/char/drm/radeon_irq.c:
[...]
irqreturn_t DRM(irq_handler)( DRM_IRQ_ARGS )
{
        drm_device_t *dev = (drm_device_t *) arg;
        drm_radeon_private_t *dev_priv =
           (drm_radeon_private_t *)dev->dev_private;
        u32 stat;

        /* Only consider the bits we're interested in - others could be used
         * outside the DRM
         */
>       stat = RADEON_READ(RADEON_GEN_INT_STATUS)
>            & (RADEON_SW_INT_TEST | RADEON_CRTC_VBLANK_STAT);
>       if (!stat)
>               return IRQ_NONE;

Can you turn the ">" lines into:
	stat = RADEON_READ(RADEON_GEN_INT_STATUS);
	if (!(stat & (RADEON_SW_INT_TEST | RADEON_CRTC_VBLANK_STAT))) {
		int ret = IRQ_NONE;

		if (stat & ~(RADEON_SW_INT_TEST | RADEON_CRTC_VBLANK_STAT)) {
			DRM_INFO("Bingo !\n");
			ret = IRQ_HANDLED;
		}
		return ret;
	}

If it does not work, please send complete dmesg and lspci -vx.

--
Ueimor