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Blackfin arch: don't accidently re-enable interrupts 

Make sure we don't accidently re-enable interrupts if we are being
called in atomic context

Signed-off-by: Robin Getz <rgetz@blackfin.uclinux.org>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
This commit is contained in:
Robin Getz 2009-02-04 16:49:45 +08:00 committed by Bryan Wu
parent 76e8fe4da6
commit 2f95d5bd84
1 changed files with 13 additions and 6 deletions
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19
arch/blackfin/kernel/traps.c
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@ -1052,8 +1052,9 @@ void show_regs(struct pt_regs *fp)
char buf [150];
struct irqaction *action;
unsigned int i;
unsigned long flags;
unsigned long flags = 0;
unsigned int cpu = smp_processor_id();
unsigned char in_atomic = (bfin_read_IPEND() & 0x10) || in_atomic();
verbose_printk(KERN_NOTICE "\n" KERN_NOTICE "SEQUENCER STATUS:\t\t%s\n", print_tainted());
verbose_printk(KERN_NOTICE " SEQSTAT: %08lx IPEND: %04lx SYSCFG: %04lx\n",
@ -1073,17 +1074,22 @@ void show_regs(struct pt_regs *fp)
}
verbose_printk(KERN_NOTICE " EXCAUSE : 0x%lx\n",
fp->seqstat & SEQSTAT_EXCAUSE);
for (i = 6; i <= 15 ; i++) {
for (i = 2; i <= 15 ; i++) {
if (fp->ipend & (1 << i)) {
decode_address(buf, bfin_read32(EVT0 + 4*i));
verbose_printk(KERN_NOTICE " physical IVG%i asserted : %s\n", i, buf);
if (i != 4) {
decode_address(buf, bfin_read32(EVT0 + 4*i));
verbose_printk(KERN_NOTICE " physical IVG%i asserted : %s\n", i, buf);
} else
verbose_printk(KERN_NOTICE " interrupts disabled\n");
}
}
/* if no interrupts are going off, don't print this out */
if (fp->ipend & ~0x3F) {
for (i = 0; i < (NR_IRQS - 1); i++) {
spin_lock_irqsave(&irq_desc[i].lock, flags);
if (!in_atomic)
spin_lock_irqsave(&irq_desc[i].lock, flags);
action = irq_desc[i].action;
if (!action)
goto unlock;
@ -1096,7 +1102,8 @@ void show_regs(struct pt_regs *fp)
}
verbose_printk("\n");
unlock:
spin_unlock_irqrestore(&irq_desc[i].lock, flags);
if (!in_atomic)
spin_unlock_irqrestore(&irq_desc[i].lock, flags);
}
}