From: Michael Schwingen <michael@schwingen.org>
To: ath9k-devel@lists.ath9k.org
Subject: [ath9k-devel] atk9k PCIe-card sometimes comes up with wrong PCI ID
Date: Mon, 21 Oct 2013 22:14:39 +0200 [thread overview]
Message-ID: <52658B2F.7020104@schwingen.org> (raw)
In-Reply-To: <CAOpc7mFtpkZHVYwubKMNfO-rfSHo+i_tj=DmmzuVeb2wYOvWBw@mail.gmail.com>
On 10/21/2013 02:51 PM, Holger Schurig wrote:
> Hi !
>
> I'm using several Sparklan WPEA 110N cards that normally come up as
> 168c:002a. But sometimes they announces themself as 168c:ff1c. Even
> "lspci -nn -A intel-conf2" (which goes directly to the PCI address
> range) shows the wrong PCI ID in such cases.
>
> What could be the cause of this issue?
I have seen such behaviour on older cards if the card sees two reset
pulses in too short succession - ie. when the second reset pulse happens
while the card is still loading data from the EEPROM. Newer Atheros
cards use I2C EEPROMs, so a chip reset during communication can hang up
the bus to the EEPROM.
cu
Michael
next prev parent reply other threads:[~2013-10-21 20:14 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-10-21 12:51 [ath9k-devel] atk9k PCIe-card sometimes comes up with wrong PCI ID Holger Schurig
2013-10-21 20:14 ` Michael Schwingen [this message]
2013-10-22 10:22 ` Holger Schurig
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