https://bugzilla.kernel.org/show_bug.cgi?id=194121 Bug ID: 194121 Summary: Bluetooth low energy not working Product: Drivers Version: 2.5 Kernel Version: 4.4.0-59 Hardware: Other OS: Linux Tree: Mainline Status: NEW Severity: blocking Priority: P1 Component: Bluetooth Assignee: linux-bluetooth@xxxxxxxxxxxxxxx Reporter: abhiarora4@xxxxxxxx Regression: No I am using QN9021 SoC working in controller mode (BLE Bluetooth core specification v4.0). It supports some standard HCI commands as well as some vendor specific commands. I am trying to attach it using hciattach. The command that i have used is hciattach. hciattach -s 9600 /dev/ttyUSBx any 9600 noflow nosleep The hcidump shows while executing sudo hciconfig hci1 up. HCI sniffer - Bluetooth packet analyzer ver 5.37 device: hci1 snap_len: 1500 filter: 0xffffffffffffffff > HCI Event: Command Complete (0x0e) plen 12 Read Local Supported Features (0x04|0x0003) ncmd 11 status 0x00 Features: 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 > HCI Event: Command Complete (0x0e) plen 12 Read Local Version Information (0x04|0x0001) ncmd 11 status 0x00 HCI Version: 4.0 (0x6) HCI Revision: 0x400 LMP Version: 4.0 (0x6) LMP Subversion: 0x400 Manufacturer: Quintic Corp. (142) > HCI Event: Command Complete (0x0e) plen 10 Read BD ADDR (0x04|0x0009) ncmd 11 status 0x00 bdaddr 08:7C:BE:3E:34:BB > HCI Event: Command Complete (0x0e) plen 11 Read Buffer Size (0x04|0x0005) ncmd 11 status 0x00 ACL MTU 0:0 SCO MTU 0:0 > HCI Event: Command Complete (0x0e) plen 4 Read Class of Device (0x03|0x0023) ncmd 11 status 0x01 class 0x000000 Error: Unknown HCI Command The hciconfig command shows: hci1: Type: BR/EDR Bus: UART BD Address: 08:7C:BE:3E:34:BB ACL MTU: 0:0 SCO MTU: 0:0 DOWN RX bytes:192 acl:0 sco:0 events:15 errors:0 TX bytes:60 acl:0 sco:0 commands:15 errors:0 hci0: Type: BR/EDR Bus: USB BD Address: C4:8E:8F:66:3B:0E ACL MTU: 820:8 SCO MTU: 255:16 UP RUNNING PSCAN RX bytes:2457 acl:0 sco:0 events:196 errors:0 TX bytes:24646 acl:0 sco:0 commands:196 errors:0 I would like to know how to prevent the kernel or kernel module to send non-supported HCI commands. I have been studying the kernel source. I found out that struct hci_dev and hci_dev_list of variable struct hci_dev. struct hci_dev has a data member command which is basically an array of uint8_t data type. I think changing the bitfields of this variable will prevent the kernel to send unsupported HCI commands. Please help me to fix this bug by suggesting or providing the patch to me. -- You are receiving this mail because: You are the assignee for the bug. -- 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
