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MIPS: Mark Eins: Fix cascading interrupt dispatcher 

* Fix mis-calculated IRQ bitshift on cascading interrupts
* Prevent cascading interrupt from being processed afterward

Signed-off-by: Shinya Kuribayashi <shinya.kuribayashi@necel.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Shinya Kuribayashi 2009-03-21 22:04:21 +09:00 committed by Ralf Baechle
parent 47c969ee54
commit fb2826b7f6
1 changed files with 6 additions and 4 deletions
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10
arch/mips/emma/markeins/irq.c
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@ -213,8 +213,7 @@ void emma2rh_irq_dispatch(void)
emma2rh_in32(EMMA2RH_BHIF_INT_EN_0);
#ifdef EMMA2RH_SW_CASCADE
if (intStatus &
(1 << ((EMMA2RH_SW_CASCADE - EMMA2RH_IRQ_INT0) & (32 - 1)))) {
if (intStatus & (1UL << EMMA2RH_SW_CASCADE)) {
u32 swIntStatus;
swIntStatus = emma2rh_in32(EMMA2RH_BHIF_SW_INT)
& emma2rh_in32(EMMA2RH_BHIF_SW_INT_EN);
@ -225,6 +224,8 @@ void emma2rh_irq_dispatch(void)
}
}
}
/* Skip S/W interrupt */
intStatus &= ~(1UL << EMMA2RH_SW_CASCADE);
#endif
for (i = 0, bitmask = 1; i < 32; i++, bitmask <<= 1) {
@ -238,8 +239,7 @@ void emma2rh_irq_dispatch(void)
emma2rh_in32(EMMA2RH_BHIF_INT_EN_1);
#ifdef EMMA2RH_GPIO_CASCADE
if (intStatus &
(1 << ((EMMA2RH_GPIO_CASCADE - EMMA2RH_IRQ_INT0) & (32 - 1)))) {
if (intStatus & (1UL << (EMMA2RH_GPIO_CASCADE % 32))) {
u32 gpioIntStatus;
gpioIntStatus = emma2rh_in32(EMMA2RH_GPIO_INT_ST)
& emma2rh_in32(EMMA2RH_GPIO_INT_MASK);
@ -250,6 +250,8 @@ void emma2rh_irq_dispatch(void)
}
}
}
/* Skip GPIO interrupt */
intStatus &= ~(1UL << (EMMA2RH_GPIO_CASCADE % 32));
#endif
for (i = 32, bitmask = 1; i < 64; i++, bitmask <<= 1) {