Can you plz run ath_info tool found in madwifi/tools directory and
post here the output ???
2007/10/12, Patrick McHardy <kaber@xxxxxxxxx>:
> Frank de Lange wrote:
> > Just got an Atheros-based card from eBay, stuffed it into my Thinkpad
> > T23 (ignoring the complaints about two ethernet cards being installed)
> > and got myself this Oops:
> >
> > BUG: unable to handle kernel NULL pointer dereference at virtual address
> > 00000000
> > [...]
> > CPU: 0
> > Not tainted VLI
> > EFLAGS: 00010246 (2.6.23-t23-01 #3)
> > EIP is at ath5k_hw_reset+0x391/0xc82 [ath5k]
>
>
> I had the same Oops with the internal card of a Thinkpad T42.
> The reason is that the rate table lookup for MODE_ATHEROS_TURBOG
> returns NULL because the capability bit is not set. I haven't
> tracked down the cause yet, but this patch fixes the Oops for me.
>
> On a related issue, the same card can receive packets fine,
> but all packets sent are received with the first 16 bytes of
> ethernet and IP header missing (the remaining data is fine).
> I didn't find the cause for this either, the packet appears
> to be fine up to the tx function. Anyone have a hint where to
> continue looking? Could this be related to the missing
> capability bit and an incorrect rate table being used?
>
> lspci -vvv:
>
> 02:02.0 Ethernet controller: Atheros Communications, Inc. AR5212
> 802.11abg NIC (rev 01)
> Subsystem: AMBIT Microsystem Corp. Unknown device 0408
> Control: I/O- Mem+ BusMaster- SpecCycle- MemWINV+ VGASnoop-
> ParErr- Stepping- SERR+ FastB2B-
> Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
> <TAbort- <MAbort- >SERR- <PERR-
> Interrupt: pin A routed to IRQ 11
> Region 0: Memory at c0210000 (32-bit, non-prefetchable) [size=64K]
> Capabilities: [44] Power Management version 2
> Flags: PMEClk- DSI- D1- D2- AuxCurrent=375mA
> PME(D0-,D1-,D2-,D3hot-,D3cold-)
> Status: D0 PME-Enable- DSel=0 DScale=2 PME-
>
> iwconfig output:
>
> ath0 IEEE 802.11b ESSID:"wlan"
> Mode:Managed Frequency:2.412 GHz Access Point: Not-Associated
> Tx-Power=27 dBm
> Retry min limit:7 RTS thr:off Fragment thr=2346 B
> Encryption key:[...]
> Link Quality:0 Signal level:0 Noise level:0
> Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
> Tx excessive retries:0 Invalid misc:0 Missed beacon:0
>
> diff --git a/drivers/net/wireless/ath5k/hw.c b/drivers/net/wireless/ath5k/hw.c
> index ae4c5b5..8018af5 100644
> --- a/drivers/net/wireless/ath5k/hw.c
> +++ b/drivers/net/wireless/ath5k/hw.c
> @@ -499,9 +499,10 @@ const struct ath5k_rate_table *ath5k_hw_get_rate_table(struct ath_hw *hal,
> {
> AR5K_TRACE;
>
> +#if 0
> if (!test_bit(mode, hal->ah_capabilities.cap_mode))
> return NULL;
> -
> +#endif
> /* Get rate tables */
> switch (mode) {
> case MODE_IEEE80211A:
>
>
--
GPG ID: 0xD21DB2DB
As you read this post global entropy rises. Have Fun ;-)
Nick
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