Messages in this thread | | | Date | Tue, 1 Mar 2011 15:27:54 -0500 (EST) | From | Alan Stern <> | Subject | Re: [linux-pm] [RFC, PATCHv3 3/3] mmc: sdhci: handle wake-up from runtime_pm |
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On Tue, 1 Mar 2011, Pierre Tardy wrote:
> >> + if (pm_runtime_suspended()) { > >> + host->waking_up = 1; > >> + /* Note that we disable temporarly the interrupt until we do the > >> + * resume. If we don't then we'll get constantly interrupted > >> + * until we actually resume. > >> + * > >> + * as the irq is shared, this might not be very friendly to our > >> + * irq sharers but the pm_runtime workqueue should really be > >> + * called soon. > > > > Instead of disabling the IRQ, would it be possible to tell the device > > to stop generating an interrupt request? > > Well, the device is power gated, so any access to it will cause a bus > timeout (depending of the platform)
But could you gate the power back on and then turn off the interrupt request?
It seems like a foolish design to have an interrupt request that can't be turned off by an interrupt handler.
Alan Stern
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