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rsi_91x: Failed to read status register on failed authentication

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Hi Amit,

I'm seeing quite a strange behavior of RedPine module.
It connects perfectly fine to one of access points but fails
to connect to another.

Moreover after that failure RSI driver starts to flood me with
messages saying:
--------------------->8--------------------
rsi_91x: rsi_sdio_check_buffer_status: Failed to read status register
--------------------->8--------------------

Below you may find details of my 2 experiments.
Note I use vanilla Linux kernel v4.14.4

Any ideas what could be wrong?

-Alexey


1. Working scenario
======================================================
# cat /etc/wpa_supplicant.conf 
ctrl_interface=/var/run/wpa_supplicant
ap_scan=1

network={
  ssid="YYY"
  psk="zzz"
}

# iw wlan0 scan
BSS 80:19:34:1f:5e:50(on wlan0) -- associated
        TSF: 248634601 usec (0d, 00:04:08)
        freq: 2412
        beacon interval: 100 TUs
        capability: ESS Privacy ShortSlotTime (0x0411)
        signal: -31.00 dBm
        last seen: 0 ms ago
        Information elements from Probe Response frame:
        SSID: YYY
        Supported rates: 1.0* 2.0* 5.5* 11.0* 6.0 9.0 12.0 18.0 
        DS Parameter set: channel 1
        ERP: Barker_Preamble_Mode
        Extended supported rates: 24.0 36.0 48.0 54.0 
        RSN:     * Version: 1
                 * Group cipher: CCMP
                 * Pairwise ciphers: CCMP
                 * Authentication suites: PSK
                 * Capabilities: 16-PTKSA-RC 1-GTKSA-RC (0x000c)
        HT capabilities:
                Capabilities: 0x1ec
                        HT20
                        SM Power Save disabled
                        RX HT20 SGI
                        RX HT40 SGI
                        TX STBC
                        RX STBC 1-stream
                        Max AMSDU length: 3839 bytes
                        No DSSS/CCK HT40
                Maximum RX AMPDU length 65535 bytes (exponent: 0x003)
                Minimum RX AMPDU time spacing: 4 usec (0x05)
                HT Max RX data rate: 300 Mbps
                HT TX/RX MCS rate indexes supported: 0-15
        HT operation:
                 * primary channel: 1
                 * secondary channel offset: no secondary
                 * STA channel width: 20 MHz
                 * RIFS: 0
                 * HT protection: no
                 * non-GF present: 1
                 * OBSS non-GF present: 0
                 * dual beacon: 0
                 * dual CTS protection: 0
                 * STBC beacon: 0
                 * L-SIG TXOP Prot: 0
                 * PCO active: 0
                 * PCO phase: 0
        Extended capabilities: Extended Channel Switching, 6
        WMM:     * Parameter version 1
                 * BE: CW 15-1023, AIFSN 3
                 * BK: CW 15-1023, AIFSN 7
                 * VI: CW 7-15, AIFSN 2, TXOP 2976 usec
                 * VO: CW 3-7, AIFSN 2, TXOP 1472 usec
        WPS:     * Version: 1.0
                 * Wi-Fi Protected Setup State: 2 (Configured)
                 * Response Type: 3 (AP)
                 * UUID: 97b29264-d9a5-5551-88f9-62fbdacb7162
                 * Manufacturer:  
                 * Model:  
                 * Model Number:  
                 * Serial Number:  
                 * Primary Device Type: 0-00000000-0
                 * Device name:  
                 * Config methods: Display, Keypad
                 * Unknown TLV (0x1049, 6 bytes): 00 37 2a 00 01 20

# ifconfig wlan0 up
rsi_91x: ===> Interface UP <===
rsi_91x: rsi_disable_ps: Cannot accept disable PS in PS_NONE state
IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready

# wpa_supplicant -B -i wlan0 -c /etc/wpa_supplicant.conf
Successfully initialized wpa_supplicant
rfkill: Cannot open RFKILL control device
# wlan0: authenticate with 80:19:34:1f:5e:50
wlan0: send auth to 80:19:34:1f:5e:50 (try 1/3)
wlan0: authenticated
wlan0: associate with 80:19:34:1f:5e:50 (try 1/3)
wlan0: RX AssocResp from 80:19:34:1f:5e:50 (capab=0x411 status=0 aid=1)
IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
wlan0: associated
rsi_91x: rsi_hal_key_config: Cipher 0xfac04 key_type: 1 key_len: 16
rsi_91x: rsi_mac80211_set_key: RSI set_key
rsi_91x: rsi_hal_key_config: Cipher 0xfac04 key_type: 2 key_len: 16
rsi_91x: rsi_mac80211_set_key: RSI set_key

# udhcpc -i wlan0
udhcpc: started, v1.27.2
udhcpc: sending discover
udhcpc: sending select for 10.42.1.137
udhcpc: lease of 10.42.1.137 obtained, lease time 3600
deleting routers
adding dns 10.42.1.1
# ifconfig 
lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

wlan0     Link encap:Ethernet  HWaddr 00:23:A7:65:9B:94  
          inet addr:10.42.1.137  Bcast:10.42.1.255  Mask:255.255.255.0
          inet6 addr: fe80::223:a7ff:fe65:9b94/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:5 errors:0 dropped:0 overruns:0 frame:0
          TX packets:11 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:1028 (1.0 KiB)  TX bytes:1738 (1.6 KiB)
======================================================

2. Failing scenario:
======================================================
# cat /etc/wpa_supplicant.conf 
ctrl_interface=/var/run/wpa_supplicant
ap_scan=1

network={
  ssid="XXX"
  psk="zzz"
}

# iw wlan0 scan
BSS 6c:3b:6b:7d:a1:46(on wlan0)
        TSF: 251623213323 usec (2d, 21:53:43)
        freq: 2427
        beacon interval: 100 TUs
        capability: ESS Privacy ShortSlotTime (0x0411)
        signal: -65.00 dBm
        last seen: 0 ms ago
        Information elements from Probe Response frame:
        SSID: XXX
        Supported rates: 1.0* 2.0* 5.5* 11.0* 6.0 9.0 12.0 18.0 
        DS Parameter set: channel 4
        ERP: <no flags>
        HT capabilities:
                Capabilities: 0x106e
                        HT20/HT40
                        SM Power Save disabled
                        RX HT20 SGI
                        RX HT40 SGI
                        No RX STBC
                        Max AMSDU length: 3839 bytes
                        DSSS/CCK HT40
                Maximum RX AMPDU length 65535 bytes (exponent: 0x003)
                Minimum RX AMPDU time spacing: No restriction (0x00)
                HT RX MCS rate indexes supported: 0-15
                HT TX MCS rate indexes are undefined
        RSN:     * Version: 1
                 * Group cipher: CCMP
                 * Pairwise ciphers: CCMP TKIP
                 * Authentication suites: PSK
                 * Capabilities: 1-PTKSA-RC 1-GTKSA-RC (0x0000)
        Extended supported rates: 24.0 36.0 48.0 54.0 
        HT operation:
                 * primary channel: 4
                 * secondary channel offset: above
                 * STA channel width: any
                 * RIFS: 0
                 * HT protection: no
                 * non-GF present: 0
                 * OBSS non-GF present: 0
                 * dual beacon: 0
                 * dual CTS protection: 0
                 * STBC beacon: 0
                 * L-SIG TXOP Prot: 0
                 * PCO active: 0
                 * PCO phase: 0
        WMM:     * Parameter version 1
                 * u-APSD
                 * BE: CW 15-1023, AIFSN 3
                 * BK: CW 15-1023, AIFSN 7
                 * VI: CW 7-15, AIFSN 2, TXOP 3008 usec
                 * VO: CW 3-7, AIFSN 2, TXOP 1504 usec

# ifconfig wlan0 up
rsi_91x: ===> Interface UP <===
rsi_91x: rsi_disable_ps: Cannot accept disable PS in PS_NONE state
IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready

# wpa_supplicant -B -i wlan0 -c /etc/wpa_supplicant.conf
Successfully initialized wpa_supplicant
rfkill: Cannot open RFKILL control device
# wlan0: authenticate with 6c:3b:6b:7d:a1:46
wlan0: send auth to 6c:3b:6b:7d:a1:46 (try 1/3)
wlan0: send auth to 6c:3b:6b:7d:a1:46 (try 2/3)
wlan0: send auth to 6c:3b:6b:7d:a1:46 (try 3/3)
rsi_91x: rsi_sdio_write_register_multiple: Synch Cmd53 write failed -16
rsi_91x: rsi_sdio_host_intf_write_pkt: Unable to write onto the card: -16
rsi_91x: rsi_send_mgmt_pkt: Failed to write the packet
wlan0: authentication with 6c:3b:6b:7d:a1:46 timed out
wlan0: authenticate with 6c:3b:6b:76:e0:ab
wlan0: send auth to 6c:3b:6b:76:e0:ab (try 1/3)
wlan0: send auth to 6c:3b:6b:76:e0:ab (try 2/3)
wlan0: send auth to 6c:3b:6b:76:e0:ab (try 3/3)
rsi_91x: rsi_sdio_check_buffer_status: Failed to read status register
wlan0: authentication with 6c:3b:6b:76:e0:ab timed out
rsi_91x: rsi_sdio_check_buffer_status: Failed to read status register
rsi_91x: rsi_sdio_check_buffer_status: Failed to read status register
rsi_91x: rsi_sdio_check_buffer_status: Failed to read status register
rsi_91x: rsi_sdio_check_buffer_status: Failed to read status register
rsi_91x: rsi_sdio_check_buffer_status: Failed to read status register
rsi_91x: rsi_sdio_check_buffer_status: Failed to read status register
rsi_91x: rsi_sdio_check_buffer_status: Failed to read status register
rsi_91x: rsi_sdio_check_buffer_status: Failed to read status register
rsi_91x: rsi_sdio_check_buffer_status: Failed to read status register
rsi_91x: rsi_sdio_check_buffer_status: Failed to read status register
rsi_91x: rsi_sdio_check_buffer_status: Failed to read status register
======================================================




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