https://bugzilla.kernel.org/show_bug.cgi?id=135431 Bug ID: 135431 Summary: HCI User Channel is not exclusive Product: Drivers Version: 2.5 Kernel Version: 4.4.0 Hardware: All OS: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: Bluetooth Assignee: linux-bluetooth@xxxxxxxxxxxxxxx Reporter: emil.lenngren@xxxxxxxxx Regression: No Hi. I'm using HCI_CHANNEL_USER and I've read that "The application gains exclusive access to this device and forces the kernel to stay away and not manage it." But this does not seem to be true. For example both a "hciconfig -a" as well as a "hcitool lescan" sends some packets over the HCI. However, "hciconfig -a" fails with "Can't read class of device on hci0: Connection timed out (110)" but still the messages are sent on the socket. And "hcitool lescan" disables scan right after it has enabled it for some reason. When I have an active HCI_CHANNEL_USER socket and issue "hciconfig -a", I see this in btmon: < HCI Command: Read Local Name (0x03|0x0014) plen 0 [hci0] 3.287660 > HCI Event: Command Complete (0x0e) plen 252 [hci0] 3.303241 Read Local Name (0x03|0x0014) ncmd 1 Status: Success (0x00) Name: Bluetooth USB Host Controller < HCI Command: Read Class of Device (0x03|0x0023) plen 0 [hci0] 5.288940 > HCI Event: Command Complete (0x0e) plen 7 [hci0] 5.290457 Read Class of Device (0x03|0x0023) ncmd 1 Status: Success (0x00) Class: 0x000000 Major class: Miscellaneous Minor class: 0x00 For "sudo hcitool lescan": < HCI Command: LE Set Scan Parameters (0x08|0x000b) plen 7 [hci0] 22.557600 Type: Active (0x01) Interval: 10.000 msec (0x0010) Window: 10.000 msec (0x0010) Own address type: Public (0x00) Filter policy: Accept all advertisement (0x00) > HCI Event: Command Complete (0x0e) plen 4 [hci0] 22.558289 LE Set Scan Parameters (0x08|0x000b) ncmd 1 Status: Success (0x00) < HCI Command: LE Set Scan Enable (0x08|0x000c) plen 2 [hci0] 24.561344 Scanning: Enabled (0x01) Filter duplicates: Enabled (0x01) > HCI Event: Command Complete (0x0e) plen 4 [hci0] 24.562613 LE Set Scan Enable (0x08|0x000c) ncmd 1 Status: Success (0x00) < HCI Command: LE Set Scan Enable (0x08|0x000c) plen 2 [hci0] 24.562879 Scanning: Disabled (0x00) Filter duplicates: Disabled (0x00) > HCI Event: Command Complete (0x0e) plen 4 [hci0] 24.563499 LE Set Scan Enable (0x08|0x000c) ncmd 1 Status: Success (0x00) < HCI Command: LE Set Scan Enable (0x08|0x000c) plen 2 [hci0] 26.565344 Scanning: Disabled (0x00) Filter duplicates: Enabled (0x01) > HCI Event: Command Complete (0x0e) plen 4 [hci0] 26.566494 LE Set Scan Enable (0x08|0x000c) ncmd 1 Status: Success (0x00) < HCI Command: LE Set Scan Enable (0x08|0x000c) plen 2 [hci0] 26.568638 Scanning: Disabled (0x00) Filter duplicates: Disabled (0x00) > HCI Event: Command Complete (0x0e) plen 4 [hci0] 26.569530 LE Set Scan Enable (0x08|0x000c) ncmd 1 Status: Success (0x00) Trying to connect to a BLE device using gatttool however fails as expected. -- 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
