[Bug 217773] New: Bluetooth LE scan doesn't show device name

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=217773

            Bug ID: 217773
           Summary: Bluetooth LE scan doesn't show device name
           Product: Drivers
           Version: 2.5
          Hardware: All
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P3
         Component: Bluetooth
          Assignee: linux-bluetooth@vger.kernel.org
          Reporter: tatrics@gmail.com
        Regression: No

Hi!
At some point after kernel 5.9 I started having issues with LE device scanning.
Here's how it used to work:

    $ bluetoothctl
    # power on
    # scan on
     ...
    [NEW] Device 68:71:DD:73:97:D5 Playfinity-2

It successfully finds my device and it's name.
On a newer kernel instead I'm getting no name:

    [NEW] Device 4D:18:19:A8:63:B5 4D-18-19-A8-63-B5

Here's corresponding btmon logs. First from kernel 5.9.12 that can see device's
name:

```5.9.12
> HCI Event: LE Meta Event (0x3e) plen 33                  #118 [hci0] 5.607028
      LE Extended Advertising Report (0x0d)
        Num reports: 1
        Entry 0
          Event type: 0x0013
            Props: 0x0013
              Connectable
              Scannable
              Use legacy advertising PDUs
            Data status:  [0;32mComplete [0m
          Legacy PDU Type: ADV_IND (0x0013)
          Address type: Random (0x01)
          Address: 68:71:DD:73:97:D5 (Resolvable)
          Primary PHY: LE 1M
          Secondary PHY: No packets
          SID: no ADI field (0xff)
          TX power: 127 dBm
          RSSI: -54 dBm (0xca)
          Periodic advertising interval: 0.00 msec (0x0000)
          Direct address type: Public (0x00)
          Direct address: 00:00:00:00:00:00 (OUI 00-00-00)
          Data length: 0x07
        02 01 06 03 02 f0 ff                             .......
        Flags: 0x06
          LE General Discoverable Mode
          BR/EDR Not Supported
        16-bit Service UUIDs (partial): 1 entry
          Unknown (0xfff0)
> HCI Event: LE Meta Event (0x3e) plen 49                  #119 [hci0] 5.608029
      LE Extended Advertising Report (0x0d)
        Num reports: 1
        Entry 0
          Event type: 0x001b
            Props: 0x001b
              Connectable
              Scannable
              Scan response
              Use legacy advertising PDUs
            Data status:  [0;32mComplete [0m
          Legacy PDU Type: SCAN_RSP to an ADV_SCAN_IND (0x001b)
          Address type: Random (0x01)
          Address: 68:71:DD:73:97:D5 (Resolvable)
          Primary PHY: LE 1M
          Secondary PHY: No packets
          SID: no ADI field (0xff)
          TX power: 127 dBm
          RSSI: -54 dBm (0xca)
          Periodic advertising interval: 0.00 msec (0x0000)
          Direct address type: Public (0x00)
          Direct address: 00:00:00:00:00:00 (OUI 00-00-00)
          Data length: 0x17
        0d 09 50 6c 61 79 66 69 6e 69 74 79 2d 32 02 0a  ..Playfinity-2..
        00 05 12 50 00 68 00                             ...P.h.
        Name (complete): Playfinity-2
        TX power: 0 dBm
        Peripheral Conn. Interval: 0x0050 - 0x0068
```

And from 6.4.8:

```6.4.8
> HCI Event: LE Meta Event (0x3e) plen 33                  #130 [hci0] 9.180207
      LE Extended Advertising Report (0x0d)
        Num reports: 1
        Entry 0
          Event type: 0x0013
            Props: 0x0013
              Connectable
              Scannable
              Use legacy advertising PDUs
            Data status: �[0;32mComplete�[0m
          Legacy PDU Type: ADV_IND (0x0013)
          Address type: Random (0x01)
          Address: 4D:18:19:A8:63:B5 (Resolvable)
          Primary PHY: LE 1M
          Secondary PHY: No packets
          SID: no ADI field (0xff)
          TX power: 127 dBm
          RSSI: -53 dBm (0xcb)
          Periodic advertising interval: 0.00 msec (0x0000)
          Direct address type: Public (0x00)
          Direct address: 00:00:00:00:00:00 (OUI 00-00-00)
          Data length: 0x07
        02 01 06 03 02 f0 ff                             .......
        Flags: 0x06
          LE General Discoverable Mode
          BR/EDR Not Supported
        16-bit Service UUIDs (partial): 1 entry
          Unknown (0xfff0)
```

I've tried compiling 5.9.12 to see if I can bissect, but it fails to compile
with gcc12..

Is it expected that newer kernels can't get device name? Perhaps some
additional action is needed fetch it?

Thanks!

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