On Thu, Jan 28, 2016 at 05:42:26PM +0800, Haibo Chen wrote: > Currently sdhci driver free irq in host suspend, and call > request_threaded_irq() in host resume. But during host resume, > Ctrl+C can impact sdhci host resume, see the error log: Ctrl+C should have no effect on this - that seems to imply that there's some other bug elsewhere. > diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c > index d622435..4b1646b 100644 > --- a/drivers/mmc/host/sdhci.c > +++ b/drivers/mmc/host/sdhci.c > @@ -2686,7 +2686,7 @@ int sdhci_suspend_host(struct sdhci_host *host) > host->ier = 0; > sdhci_writel(host, 0, SDHCI_INT_ENABLE); > sdhci_writel(host, 0, SDHCI_SIGNAL_ENABLE); > - free_irq(host->irq, host); > + disable_irq(host->irq); This is really not acceptable I'm afraid. While it's common on ARM for each interrupt to be uniquely allocated to a peripheral, not all SDHCI platforms have that luxury. SDHCI is also used on PCI, and on x86 platforms, it's common to have PCI interrupts shared between (sometimes many) different PCI devices. For example, on my laptop: 18: 1089806 286185 IO-APIC-fasteoi uhci_hcd:usb8, r852, mmc0 the SDHCI interrupt is shared with two other peripherals - one USB controller and a NAND device. Disabling the interrupt will adversely impact other peripherals and cause regressions where the interrupt is shared. So, I'm afraid I'm going to have to NAK this patch. -- RMK's Patch system: http://www.arm.linux.org.uk/developer/patches/ FTTC broadband for 0.8mile line: currently at 9.6Mbps down 400kbps up according to speedtest.net. -- 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
