Hello, We are using a linux device as a iPad MFI peripheral. In the current scenario, the iPad is the USB device, and linux system is the host. With Apple MFI in this configuration, the only protocol available to transfer data is HID. We're noticing that when we transfer a lot of data over HID, the kernel is locked (seems that interrupts are disabled) for up to 40ms at a time.
We noticed a big improvement when upgrading from the 3.0 to the 3.12 kernel, but the problem is still there. The CPU is the TI DM3730 (same as beaglebone-xm). Is this expected? Any suggestions on where to start looking to improve this. Thanks, Cliff -- ================= http://bec-systems.com -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
