On Tue, 11 Dec 2012, Timur wrote: > > Thank you for your response. Yes, unplugging helps. But host and slave > > should also function in a fixed installation setup, where cables are > > hidden. I tried different slave devices and they are all "not > > accepting address xx, error -71" after power was lost. > > > > I think it is the host causing the issue, not working properly through > > it's deep sleep cycle. Something is wrong or missing in N7's > > tegra_ehci_resume() / tegra_ehci_suspend() methods. These methods > > exist (found them!) and they are being called: > > > > https://github.com/mehrvarz/android_kernel_grouper/blob/android-tegra3-grouper-3.1-jb-mr0/drivers/usb/host/ehci-tegra.c#L1246 > > > > A power loss of under 20s will make the host only go into light sleep > and does not result in error -71. Are you talking about a loss of power to the host or a loss of power to the slave? What is the cause of this power loss? If you think this problem is specifically related to the Tegra, why not ask the person responsible for maintaining the Tegra code? (Hint: Look in the MAINTAINERS file at the top level of the kernel source code.) Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
