[PATCH 11/16] m68k/mac: fix baboon irq disable and shutdown

Finn Thain
2011-10-23T14:12:06Z

[-- Attachment #1: remove-baboon-irq-disabled --]
[-- Type: text/plain, Size: 2116 bytes --]

The baboon_disabled hack is broken because it is missing an irq shutdown method. So releasing a Baboon irq kills the other Baboon irqs. But we don't really need this hack because we don't have media bay support and TREX uses a NuBus IRQ. Remove it.

Signed-off-by: Finn Thain <fthain@telegraphics.com.au>

Index: linux-m68k/arch/m68k/mac/baboon.c
===================================================================
--- linux-m68k.orig/arch/m68k/mac/baboon.c 2011-10-22 23:02:38.000000000 +1100
+++ linux-m68k/arch/m68k/mac/baboon.c 2011-10-22 23:02:39.000000000 +1100
@@ -18,7 +18,6 @@

int baboon_present;
static volatile struct baboon *baboon;
-static unsigned char baboon_disabled;

#if 0
extern int macide_ack_intr(struct ata_channel *);
@@ -84,37 +83,32 @@ static void baboon_irq(unsigned int irq,

void __init baboon_register_interrupts(void)
{
- baboon_disabled = 0;
irq_set_chained_handler(IRQ_NUBUS_C, baboon_irq);
}

/*
- * The means for masking individual baboon interrupts remains a mystery, so
- * enable the umbrella interrupt only when no baboon interrupt is disabled.
+ * The means for masking individual Baboon interrupts remains a mystery.
+ * However, since we only use the IDE IRQ, we can just enable/disable all
+ * Baboon interrupts. If/when we handle more than one Baboon IRQ, we must
+ * either figure out how to mask them individually or else implement the
+ * same workaround that's used for NuBus slots (see nubus_disabled and
+ * via_nubus_irq_shutdown).
*/

void baboon_irq_enable(int irq)
{
- int irq_idx = IRQ_IDX(irq);
-
#ifdef DEBUG_IRQUSE
printk("baboon_irq_enable(%d)\n", irq);
#endif

- baboon_disabled &= ~(1 << irq_idx);
- if (!baboon_disabled)
- mac_irq_enable(irq_get_irq_data(IRQ_NUBUS_C));
+ mac_irq_enable(irq_get_irq_data(IRQ_NUBUS_C));
}

void baboon_irq_disable(int irq)
{
- int irq_idx = IRQ_IDX(irq);
-
#ifdef DEBUG_IRQUSE
printk("baboon_irq_disable(%d)\n", irq);
#endif

- baboon_disabled |= 1 << irq_idx;
- if (baboon_disabled)
- mac_irq_disable(irq_get_irq_data(IRQ_NUBUS_C));
+ mac_irq_disable(irq_get_irq_data(IRQ_NUBUS_C));
}