spi/fsl-espi: Don't spin forever on SPIE_RXCNT

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Infinite loop on SPIE_RXCNT occurred.

while (SPIE_RXCNT(events) < min(4, mspi->len)) {
        cpu_relax();
        events = mpc8xxx_spi_read_reg(&reg_base->event);
}

We met a soft lockup at fsl_espi_cpu_irq() because of this.

Fix it by using spin_event_timeout() so that fsl_espi_cpu_irq()
can break loop with timeouts dmesg.

Signed-off-by: Nobuteru Hayashi <hayashi.nbb@ncos.nec.co.jp>
Signed-off-by: Mark Brown <broonie@kernel.org>

...

This commit is contained in:

Nobuteru Hayashi 2016-03-18 11:35:21 +00:00 • committed by Mark Brown

parent f55532a0c0

commit a12ddd60ed

1 changed files with 10 additions and 3 deletions

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drivers/spi/spi-fsl-espi.c

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