Re: [PATCH 4.19 21/38] spi: fsl-espi: Only process interrupts for expected events

Hi!

[ Upstream commit b867eef4cf548cd9541225aadcdcee644669b9e1 ]

The SPIE register contains counts for the TX FIFO so any time the irq handler was invoked we would attempt to process the RX/TX fifos. Use the SPIM value to mask the events so that we only process interrupts that were expected.

This was a latent issue exposed by commit 3282a3da25bd ("powerpc/64: Implement soft interrupt replay in C").

We don't seem to have commit 3282... in 4.19, so we don't need this one in 4.19-stable according to the changelog.

Best regards, Pavel