* Adrian Hunter <adrian.hunter@xxxxxxxxx> [090406 05:00]: > From: Kevin Hilman <khilman@xxxxxxxxxxxxxxxxxxx> > > 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@xxxxxxxxxxxxxxxxxxx> > Signed-off-by: Adrian Hunter <adrian.hunter@xxxxxxxxx> Acked-by: Tony Lindgen <tony@xxxxxxxxxxx> > --- > > > > > This patch is slightly modified from Kevin's original, which is > here: > > http://marc.info/?l=linux-omap&m=123862814815052&w=2 > > > > drivers/mmc/host/omap_hsmmc.c | 4 ++++ > 1 files changed, 4 insertions(+), 0 deletions(-) > > diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c > index 04e5a0c..2ae6049 100644 > --- a/drivers/mmc/host/omap_hsmmc.c > +++ b/drivers/mmc/host/omap_hsmmc.c > @@ -452,6 +452,8 @@ static irqreturn_t mmc_omap_irq(int irq, void *dev_id) > if (host->mrq == NULL) { > OMAP_HSMMC_WRITE(host->base, STAT, > OMAP_HSMMC_READ(host->base, STAT)); > + /* Flush posted write */ > + OMAP_HSMMC_READ(host->base, STAT); > return IRQ_HANDLED; > } > > @@ -523,6 +525,8 @@ static irqreturn_t mmc_omap_irq(int irq, void *dev_id) > } > > OMAP_HSMMC_WRITE(host->base, STAT, status); > + /* Flush posted write */ > + OMAP_HSMMC_READ(host->base, STAT); > > if (end_cmd || (status & CC)) > mmc_omap_cmd_done(host, host->cmd); > -- > 1.5.6.3 -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
