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ARC: Reset the value of Interrupt Priority Register

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In case bootloader has changed the priority of one/more IRQ lines

Reported-by: Noam Camus <noamc@ezchip.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
This commit is contained in:
Vineet Gupta 2013-09-12 13:53:06 +05:30
parent 07ba69a46c
commit 54c8bff14d
1 changed files with 7 additions and 3 deletions
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10
arch/arc/kernel/irq.c
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@ -39,10 +39,14 @@ void arc_init_IRQ(void)
level_mask |= IS_ENABLED(CONFIG_ARC_IRQ5_LV2) << 5;
level_mask |= IS_ENABLED(CONFIG_ARC_IRQ6_LV2) << 6;
if (level_mask) {
/*
* Write to register, even if no LV2 IRQs configured to reset it
* in case bootloader had mucked with it
*/
write_aux_reg(AUX_IRQ_LEV, level_mask);
if (level_mask)
pr_info("Level-2 interrupts bitset %x\n", level_mask);
write_aux_reg(AUX_IRQ_LEV, level_mask);
}
}
/*