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authorPaul Burton <[email protected]>2016-05-17 15:31:04 +0100
committerRalf Baechle <[email protected]>2016-05-28 12:35:02 +0200
commit640356a48750ff9ef3303d85158ef9c42c3a18b6 (patch)
tree156b010b5d2c78df6048993a9dd6284f17bf65d7
parent6e4ad1b413604b9130bdbe532aafdbd47ff5318e (diff)
MIPS: Clear Status IPL field when using EIC
When using an external interrupt controller (EIC) the interrupt mask bits in the cop0 Status register are reused for the Interrupt Priority Level, and any interrupts with a priority lower than the field will be ignored. Clear the field to 0 by default such that all interrupts are serviced. Without doing so we default to arbitrarily ignoring all or some subset of interrupts. Signed-off-by: Paul Burton <[email protected]> Reviewed-by: Matt Redfearn <[email protected]> Tested-by: Matt Redfearn <[email protected]> Cc: Guenter Roeck <[email protected]> Cc: Sergei Shtylyov <[email protected]> Cc: Joe Perches <[email protected]> Cc: James Hogan <[email protected]> Cc: [email protected] Cc: [email protected] Patchwork: https://patchwork.linux-mips.org/patch/13272/ Signed-off-by: Ralf Baechle <[email protected]>
-rw-r--r--arch/mips/kernel/irq.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/mips/kernel/irq.c b/arch/mips/kernel/irq.c
index 8eb5af805964..f25f7eab7307 100644
--- a/arch/mips/kernel/irq.c
+++ b/arch/mips/kernel/irq.c
@@ -54,6 +54,9 @@ void __init init_IRQ(void)
for (i = 0; i < NR_IRQS; i++)
irq_set_noprobe(i);
+ if (cpu_has_veic)
+ clear_c0_status(ST0_IM);
+
arch_init_irq();
}