Hi, On Wed, Jan 12, 2011, zhangfei gao wrote: > Is there any flag indicating bt/fm is ready to run "hcitool cmd", ie, > "hciconfig hci0 up" is really finished. > > We met error "Send failed: File descriptor in bad state", if run > hcitool immediately after "hciconfig hci0 up" > For example: > hciconfig hci0 up > hcitool cmd 3f 66 02 26 00 00 00 30 The HCIDEVUP ioctl is at least synchronized with the open() callback for the HCI driver so in that sense if the driver is working fine it should be possible to send commands when it returns. There is however an issue with existing kernels that HCIDEVUP doesn't wait for all of the kernels own HCI commands to finish before returning to user space. There was a patch sent for this some time ago which you might be interested in trying: http://marc.info/?l=linux-bluetooth&m=129296529630642&w=4 Johan -- To unsubscribe from this list: send the line "unsubscribe linux-bluetooth" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
