Re: sc16is7xx: a lot of time is spend in sc16is7xx_port_irq

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CC'ing RT

On 2016-02-24 16:31, Sean Nyekjær wrote:
Hi

I'm using the sc16is750 on an imx6d platform with RT patches applied.

I have observed that sometimes the driver locks the whole system as is loops inside the sc16is7xx_port_irq. I have applied some debug and seen we are looping upto 130000 times in the while(1) loop. The SC16IS7XX_IIR_REG does signal the SC16IS7XX_IIR_XOFFI_SRC but the SC16IS7XX_IER_XOFFI_BIT is not set.

Please ask for more debug info if needed :-)

Br
Sean

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