[PW_SID:1103706] Bluetooth: hci_sync: fix simultaneous discovery stuck in FINDING

[BluezTestBot]

When hci_inquiry_complete_evt is called between le_scan_disable and
le_set_scan_enable_complete and no remote name needs to be resolved,
the interleaved discovery with SIMULTANEOUS quirk gets stuck in
DISCOVERY_FINDING. le_set_scan_enable_complete does not check inquiry
state. No one sets DISCOVERY_STOPPED in this process.

< HCI Command: LE Set Extended Scan Enable #1764 [hci0] 608.610392
Extended scan: Disabled (0x00)
Filter duplicates: Disabled (0x00)
Duration: 0 msec (0x0000)
Period: 0.00 sec (0x0000)

HCI Event: Inquiry Complete (0x01) #1765 [hci0] 608.610548
Status: Success (0x00)
HCI Event: Command Complete (0x0e) #1766 [hci0] 608.611589
LE Set Extended Scan Enable (0x08|0x0042) ncmd 2
Status: Success (0x00)

Add scan_disable_complete to check state and stop discovery if stuck.
Tested with bluetooth AX201 (8087:0026) in Dell Vostro 13 laptop.

[4517.963204] hci0: state 0 -> 1
[4518.096858] hci0: state 1 -> 2
[4528.353765] hci0: state 2 -> 0
[4528.353776] hci0: state finding to stopped
[4533.966844] hci0: state 0 -> 1
[4534.097702] hci0: state 1 -> 2
[4544.478600] hci0: state 2 -> 0

Fixes: 8ffde2a ("Bluetooth: Convert le_scan_disable timeout to hci_sync")
Signed-off-by: Jiajia Liu liujiajia@kylinos.cn

net/bluetooth/hci_sync.c | 25 ++++++++++++++++++++++++-
1 file changed, 24 insertions(+), 1 deletion(-)

[github-actions]

CheckPatch
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Duration: 0.74 seconds
Result: PASS

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Result: PASS

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Result: PASS

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Desc: Run gitlint
Duration: 0.32 seconds
Result: PASS

[github-actions]

SubjectPrefix
Desc: Check subject contains "Bluetooth" prefix
Duration: 0.12 seconds
Result: PASS

[github-actions]

BuildKernel
Desc: Build Kernel for Bluetooth
Duration: 26.47 seconds
Result: PASS

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CheckAllWarning
Desc: Run linux kernel with all warning enabled
Duration: 28.43 seconds
Result: PASS

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CheckSparse
Desc: Run sparse tool with linux kernel
Duration: 28.92 seconds
Result: PASS

[github-actions]

BuildKernel32
Desc: Build 32bit Kernel for Bluetooth
Duration: 24.87 seconds
Result: PASS

[github-actions]

TestRunnerSetup
Desc: Setup kernel and bluez for test-runner
Duration: 535.30 seconds
Result: PASS

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TestRunner_l2cap-tester
Desc: Run l2cap-tester with test-runner
Duration: 59.65 seconds
Result: PASS

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Desc: Run iso-tester with test-runner
Duration: 77.77 seconds
Result: PASS

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Desc: Run bnep-tester with test-runner
Duration: 19.01 seconds
Result: PASS

[github-actions]

TestRunner_mgmt-tester
Desc: Run mgmt-tester with test-runner
Duration: 210.17 seconds
Result: FAIL
Output:

Total: 494, Passed: 489 (99.0%), Failed: 1, Not Run: 4

Failed Test Cases
Read Exp Feature - Success                           Failed       0.247 seconds

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Desc: Run rfcomm-tester with test-runner
Duration: 25.71 seconds
Result: PASS

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Duration: 32.80 seconds
Result: PASS

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Duration: 26.19 seconds
Result: PASS

[github-actions]

TestRunner_mesh-tester
Desc: Run mesh-tester with test-runner
Duration: 25.96 seconds
Result: FAIL
Output:

Total: 10, Passed: 8 (80.0%), Failed: 2, Not Run: 0

Failed Test Cases
Mesh - Send cancel - 1                               Timed out    2.344 seconds
Mesh - Send cancel - 2                               Timed out    1.992 seconds

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TestRunner_smp-tester
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Duration: 23.25 seconds
Result: PASS

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Desc: Run userchan-tester with test-runner
Duration: 20.24 seconds
Result: PASS

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Duration: 22.78 seconds
Result: PASS

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IncrementalBuild
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Duration: 24.64 seconds
Result: PASS