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omap_hsmmc: Flush posted write to IRQ
Spurious IRQs seen on MMC after 2.6.29. Flush posted write in IRQ handler. The interrupt line is released by clearing the error status bits in the MMCHS_STAT register, which must occur before the interrupt handler returns to avoid unwanted irqs. Hence the need to flush the posted write. Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com> Signed-off-by: Adrian Hunter <adrian.hunter@nokia.com> Acked-by: Tony Lindgen <tony@atomide.com> Signed-off-by: Pierre Ossman <pierre@ossman.eu>
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@ -434,6 +434,8 @@ static irqreturn_t mmc_omap_irq(int irq, void *dev_id)
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if (host->mrq == NULL) {
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OMAP_HSMMC_WRITE(host->base, STAT,
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OMAP_HSMMC_READ(host->base, STAT));
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/* Flush posted write */
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OMAP_HSMMC_READ(host->base, STAT);
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return IRQ_HANDLED;
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}
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@ -489,6 +491,8 @@ static irqreturn_t mmc_omap_irq(int irq, void *dev_id)
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}
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OMAP_HSMMC_WRITE(host->base, STAT, status);
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/* Flush posted write */
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OMAP_HSMMC_READ(host->base, STAT);
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if (end_cmd || (status & CC))
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mmc_omap_cmd_done(host, host->cmd);
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