On Tue, Jan 09, 2018 at 07:59:05PM +0000, Trent Piepho wrote: > Usually when a device has a fifo that must be emptied before it > overflows, it is either emptied from an interrupt handler or the > interrupt handler will queue a work function or tasklet that will empty > it. Doing it from user context has a maximum latency that is too high. It wouldn't be the first SPI controller that lacked interrupt support, this is depressingly common.
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