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Pass the previously returned IRQ back to arm_get_next_irq() so that

Browse Source 
the implementation can guarantee forward progress in the event of
a stuck interrupt or interrupt storm. This is especially critical
for fast interrupt handlers, as they can cause a hard hang in that
case. When first called, arm_get_next_irq() is passed -1.

Obtained from:	Juniper Networks, Inc.
This commit is contained in:
Marcel Moolenaar 2009-06-09 18:18:41 +00:00
parent 7d34f41a7a
commit 272489fe59
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=193847
9 changed files with 10 additions and 10 deletions
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3
sys/arm/arm/intr.c
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@ -120,7 +120,8 @@ arm_handler_execute(struct trapframe *frame, int irqnb)
int i; int i;
PCPU_INC(cnt.v_intr); PCPU_INC(cnt.v_intr);
while ((i = arm_get_next_irq()) != -1) { i = -1;
while ((i = arm_get_next_irq(i)) != -1) {
intrcnt[intrcnt_tab[i]]++; intrcnt[intrcnt_tab[i]]++;
event = intr_events[i]; event = intr_events[i];
if (intr_event_handle(event, frame) != 0) { if (intr_event_handle(event, frame) != 0) {

3
sys/arm/at91/at91.c
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@ -702,9 +702,8 @@ arm_mask_irq(uintptr_t nb)
} }
int int
arm_get_next_irq() arm_get_next_irq(int last __unused)
{ {
int status; int status;
int irq; int irq;

2
sys/arm/include/intr.h
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@ -56,7 +56,7 @@
#include <machine/psl.h> #include <machine/psl.h>
int arm_get_next_irq(void); int arm_get_next_irq(int);
void arm_mask_irq(uintptr_t); void arm_mask_irq(uintptr_t);
void arm_unmask_irq(uintptr_t); void arm_unmask_irq(uintptr_t);
void arm_setup_irqhandler(const char *, int (*)(void*), void (*)(void*), void arm_setup_irqhandler(const char *, int (*)(void*), void (*)(void*),

2
sys/arm/mv/ic.c
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@ -137,7 +137,7 @@ static devclass_t mv_ic_devclass;
DRIVER_MODULE(ic, mbus, mv_ic_driver, mv_ic_devclass, 0, 0); DRIVER_MODULE(ic, mbus, mv_ic_driver, mv_ic_devclass, 0, 0);
int int
arm_get_next_irq(void) arm_get_next_irq(int last __unused)
{ {
int irq; int irq;

2
sys/arm/sa11x0/sa11x0_irqhandler.c
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@ -108,7 +108,7 @@ static uint32_t sa11x0_irq_mask = 0xfffffff;
extern vm_offset_t saipic_base; extern vm_offset_t saipic_base;
int int
arm_get_next_irq() arm_get_next_irq(int last __unused)
{ {
int irq; int irq;

2
sys/arm/xscale/i80321/i80321.c
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@ -240,7 +240,7 @@ i80321_iintsrc_read(void)
} }
int int
arm_get_next_irq() arm_get_next_irq(int last __unused)
{ {
int irq; int irq;

2
sys/arm/xscale/i8134x/i81342.c
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@ -295,7 +295,7 @@ arm_unmask_irq(uintptr_t nb)
} }
int int
arm_get_next_irq(void) arm_get_next_irq(int last __unused)
{ {
uint32_t val; uint32_t val;
val = intpnd0_read() & intr_enabled0; val = intpnd0_read() & intr_enabled0;

2
sys/arm/xscale/ixp425/ixp425.c
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@ -202,7 +202,7 @@ ixp435_irq_read(void)
} }
int int
arm_get_next_irq(void) arm_get_next_irq(int last __unused)
{ {
uint32_t irq; uint32_t irq;

2
sys/arm/xscale/pxa/pxa_icu.c
View File

@ -128,7 +128,7 @@ static devclass_t pxa_icu_devclass;
DRIVER_MODULE(pxaicu, pxa, pxa_icu_driver, pxa_icu_devclass, 0, 0); DRIVER_MODULE(pxaicu, pxa, pxa_icu_driver, pxa_icu_devclass, 0, 0);
int int
arm_get_next_irq() arm_get_next_irq(int last __unused)
{ {
int irq; int irq;