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MIPS: Simplify and correct interrupt handling for MSP4200 

The current interrupt handling code for the MSP4200 always masks an
interrupt before acknowledging it.  This is not required, as that will be
handled by the level interrupt handler.  This change simplifies the MSP4200
code to remove the masking in the ack routine, and makes sure that the
minimum required operation is performed for masking and acking, rather
than always both masking and acking the interrupt.

Signed-off-by: Shane McDonald <mcdonald.shane@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Shane McDonald 2009-07-12 10:42:06 -06:00 committed by Ralf Baechle
parent 6577890fd6
commit 0ca71737fe
1 changed files with 1 additions and 9 deletions
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10
arch/mips/pmc-sierra/msp71xx/msp_irq_slp.c
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@ -45,13 +45,6 @@ static inline void mask_msp_slp_irq(unsigned int irq)
*/
static inline void ack_msp_slp_irq(unsigned int irq)
{
mask_msp_slp_irq(irq);
/*
* only really necessary for 18, 16-14 and sometimes 3:0 (since
* these can be edge sensitive) but it doesn't hurt for the others.
*/
/* check for PER interrupt range */
if (irq < MSP_PER_INTBASE)
*SLP_INT_STS_REG = (1 << (irq - MSP_SLP_INTBASE));
@ -62,8 +55,7 @@ static inline void ack_msp_slp_irq(unsigned int irq)
static struct irq_chip msp_slp_irq_controller = {
.name = "MSP_SLP",
.ack = ack_msp_slp_irq,
.mask = ack_msp_slp_irq,
.mask_ack = ack_msp_slp_irq,
.mask = mask_msp_slp_irq,
.unmask = unmask_msp_slp_irq,
};