On Tue, 1 Mar 2011, Pierre Tardy wrote: > >> > Other drivers do it, but they use PCI PME# instead of interrupts. > >> Could you please elaborate? > >> My understanding is that PCI PME will generate MSI, which translate in > >> interrupt. > > > > It depends on the platform. On systems with ACPI, PCI PME generates an > > ACPI I/O event, which is handled by the ACPI and PM cores. It does not > > invoke the device driver's interrupt handler. > So, let's say, in the ACPI case, if the interrupt handler dont get > called, how would the driver know that he got a sdcard insert event, > and trigger a mmc_rescan() ? When the ACPI and PCI cores process the PME event, they call pm_runtime_resume(). The driver's runtime_resume routine would read the device status and see the insert event, which would cause it to trigger mmc_rescan(). Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
