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GPU: ipu: fix lockup caused by pending chained interrupts

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Even with the oops fixed by a previous patch, the system still fails to
kexec, due to a stuck chained interrupt locking the system.  We must
disable the child interrupts prior to setting up the irq chip to ensure
we don't get stuck here.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
This commit is contained in:
Russell King 2015-06-16 23:29:41 +01:00 committed by Philipp Zabel
parent 553a59fc8f
commit 510e6426d3
1 changed files with 3 additions and 0 deletions
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3
drivers/gpu/ipu-v3/ipu-common.c
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@ -1107,6 +1107,9 @@ static int ipu_irq_init(struct ipu_soc *ipu)
return ret;
}
for (i = 0; i < IPU_NUM_IRQS; i += 32)
ipu_cm_write(ipu, 0, IPU_INT_CTRL(i / 32));
for (i = 0; i < IPU_NUM_IRQS; i += 32) {
gc = irq_get_domain_generic_chip(ipu->domain, i);
gc->reg_base = ipu->cm_reg;