On Fri, 2015-07-24 at 08:48 +0200, Petr Tesarik wrote: > @@ -872,6 +886,12 @@ static int cp210x_startup(struct usb_serial > *serial) > > usb_set_serial_data(serial, spriv); > > + /* Get the 1-byte part number of the cp210x device */ > + cp210x_control_msg(serial->port[0], CP210X_VENDOR_SPECIFIC, > + REQTYPE_DEVICE_TO_HOST, CP210X_GET_PARTNUM, > + &partnum, 1, USB_CTRL_GET_TIMEOUT); > + spriv->bPartNumber = partnum & 0xFF; DMA on the stack. That breaks the cache coherency rules. You must kmalloc the buffer. Regards Oliver -- 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
