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Commit 2f95d5bd authored by Robin Getz's avatar Robin Getz Committed by Bryan Wu
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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: default avatarRobin Getz <rgetz@blackfin.uclinux.org>
Signed-off-by: default avatarBryan Wu <cooloney@kernel.org>
parent 76e8fe4d

arch/blackfin/kernel/traps.c

+13 −6
Original line number Diff line number Diff line
@@ -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)) {

			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++) {

			if (!in_atomic)

				spin_lock_irqsave(&irq_desc[i].lock, flags);



			action = irq_desc[i].action;

			if (!action)

				goto unlock;
@@ -1096,6 +1102,7 @@ void show_regs(struct pt_regs *fp) 
			}

			verbose_printk("\n");

unlock:

			if (!in_atomic)

				spin_unlock_irqrestore(&irq_desc[i].lock, flags);

		}

	}