2004-10-22 21:21:55

by Erwin Authried

Subject: [Bluez-users] lockup problem with larger packets

I have cross-compiled bluez for uClinux-2.4.20 for ARM7, with the bluez
kernel patch applied, and bluez-utils 2.10. I'm using the Conceptronic
CBT100C PCMCIA card on the system. The card is initialized with
"hciattach ttyS2 bcsp". Basically, the system works fine, but I see
occasional overrun errors on the UART, maybe because the ARM7 is running
with 40MHz only. When I transmit larger packets (l2ping -s 300 ...), the
number of overrun errors increases, and sometimes the system locks up.
I'm getting an endless sequence of:

bcsp_pkt_cull: Peer acked invalid packet
bcsp_handle_le_pkt: Found a LE sync pkt, card has reset
bcsp_pkt_cull: Peer acked invalid packet
bcsp_handle_le_pkt: Found a LE sync pkt, card has reset
bcsp_pkt_cull: Peer acked invalid packet
...

Regards,
Erwin




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2004-10-23 13:55:50

by Marcel Holtmann

Subject: Re: [Bluez-users] lockup problem with larger packets

Hi Erwin,

> I have cross-compiled bluez for uClinux-2.4.20 for ARM7, with the bluez
> kernel patch applied, and bluez-utils 2.10. I'm using the Conceptronic
> CBT100C PCMCIA card on the system. The card is initialized with
> "hciattach ttyS2 bcsp". Basically, the system works fine, but I see
> occasional overrun errors on the UART, maybe because the ARM7 is running
> with 40MHz only. When I transmit larger packets (l2ping -s 300 ...), the
> number of overrun errors increases, and sometimes the system locks up.
> I'm getting an endless sequence of:
>
> bcsp_pkt_cull: Peer acked invalid packet
> bcsp_handle_le_pkt: Found a LE sync pkt, card has reset
> bcsp_pkt_cull: Peer acked invalid packet
> bcsp_handle_le_pkt: Found a LE sync pkt, card has reset
> bcsp_pkt_cull: Peer acked invalid packet
> ...

I am not a BCSP or uClinux expert so I think that I can't help you here,
but from my testing with the BCSP part of the hci_uart driver I never
saw any problems like this.

Regards

Marcel




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