[ARM] 4589/1: ns9xxx: acknowledge IRQ_EXT2 in the demux routine for FPGA irqs
The FPGA on the a9m9750dev board interrupts the CPU via EXT2. So to acknowledge any FPGA interrupt IRQ_EXT2 must be acknowledged. Signed-off-by: Uwe Kleine-König <ukleinek@informatik.uni-freiburg.de> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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@ -70,15 +70,20 @@ static void a9m9750dev_fpga_demux_handler(unsigned int irq,
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{
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int stat = FPGA_ISR;
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desc->chip->mask_ack(irq);
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while (stat != 0) {
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int irqno = fls(stat) - 1;
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struct irq_desc *fpgadesc;
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stat &= ~(1 << irqno);
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desc = irq_desc + FPGA_IRQ(irqno);
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fpgadesc = irq_desc + FPGA_IRQ(irqno);
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desc_handle_irq(FPGA_IRQ(irqno), desc);
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desc_handle_irq(FPGA_IRQ(irqno), fpgadesc);
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}
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desc->chip->unmask(irq);
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}
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void __init board_a9m9750dev_init_irq(void)
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