On Wed, Feb 10, 2016 at 01:21:04PM +0100, Rafał Miłecki wrote: > Unfortunately the bug in spi-bcm53xx isn't obvious for me. I kept > looking at its code for a bit but couldn't find anything. > Knowing the commit that exposed this bug, does it give you any hint > what may be wrong with spi-bcm53xx? It's most likely just hammering the CPU for a very long time without scheduling due to doing a long PIO transfers. That change just removes some needless context switching.
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