fdcavalcanti opened a new pull request, #15294:
URL: https://github.com/apache/nuttx/pull/15294
## Summary
Long term (1 hour) IPERF test was failing for ESP32C3 and ESP32C6 when
running as server.
The failure happened on debug assertion related to IOB, as shown below.
```
[dut-0] 626.25- 631.26 sec 1376256 Bytes 2.20 Mbits/sec
[dut-1] dump_assert_info: Current Version: NuttX 10.4.0 e7f3a53706 Dec 10
2024 09:53:08 risc-v
[dut-1] dump_assert_info: Assertion failed iobq->qh_tail: at file:
iob/iob_add_queue.c:73 task: wifi process: Kernel 0x40001720
[dut-1] up_dump_register: EPC: 420038aa
[dut-1] up_dump_register: A0: 3fc8ed70 A1: 00000049 A2: 3c0b6c04 A3: 00000000
```
Analyzing the IOB status at this assertion, it was found that in this
backtrace sequence, wlan_recvframe did not have a spinlock as expected (this is
present on Xtensa devices). This caused unexpected behavior as some IOBs were
deleted.
```
gdb) backtrace
+backtrace
#0 iob_add_queue_internal (iob=0x40817c74 <g_iob_buffer+12064>,
iobq=0x4081d244 <g_wlan_priv+256>,
qentry=0x40814c94 <g_iob_qpool+800>) at iob/iob_add_queue.c:75
#1 0x42044e3a in wlan_rx_done (priv=0x4081d144 <g_wlan_priv>,
buffer=<optimized out>, len=590, eb=0x40837760)
at common/espressif/esp_wlan.c:464
#2 0x4080bf7a in sta_input ()
```
## Impact
Increased stability on WiFi networking for ESP32C3 and ESP32C6.
## Testing
Internal CI testing + local test on host machine with WiFi.
Results for one hour IPERF test, with target running IPERF server and host
PC running IPERF client.
- ESP32C6
0.0000-3600.3443 sec 4.08 GBytes 9.73 Mbits/sec
- ESP32C3
0.0000-3600.3273 sec 2.28 GBytes 5.43 Mbits/sec
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