linux-kernel - 2.6.25-rc2 regression in rt61pci wireless driver

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Date:	Sat, 16 Feb 2008 12:06:38 +0000
From:	"Chris Clayton" <chris2553@...glemail.com>
To:	linux-kernel@...r.kernel.org
Cc:	linux-wireless@...r.kernel.org
Subject: 2.6.25-rc2 regression in rt61pci wireless driver

Hi,

Firstly, please cc me into any any replies - I'm not subscribed.

In 2.6.25 kernels, my wireless LAN dies after even the smallest amount
of network activity. The following screen cut shows what I typically
see:

[chris:~]$ uname -a
Linux laptop 2.6.25-rc2 #10 PREEMPT Sat Feb 16 09:53:04 UTC 2008 i686
GNU/Linux
[chris:~]$ ping 192.168.1.1
PING 192.168.1.1 (192.168.1.1) from 192.168.1.30 : 56(84) bytes of data.
64 bytes from 192.168.1.1: icmp_seq=0 ttl=255 time=9.837 msec
64 bytes from 192.168.1.1: icmp_seq=1 ttl=255 time=3.148 msec
64 bytes from 192.168.1.1: icmp_seq=2 ttl=255 time=2.205 msec
^C
--- 192.168.1.1 ping statistics ---
9 packets transmitted, 3 packets received, 66% packet loss
round-trip min/avg/max/mdev = 2.205/5.063/9.837/3.397 ms
[chris:~]$ dmesg | tail
NET: Unregistered protocol family 23
parport_pc 00:0f: disabled
ACPI: PCI interrupt for device 0000:02:00.0 disabled
ACPI: PCI Interrupt 0000:01:00.0[A] -> Link [LNKA] -> GSI 11 (level, low) ->
IRQ 11
[drm] Initialized radeon 1.28.0 20060524 on minor 0
agpgart: Found an AGP 2.0 compliant device at 0000:00:00.0.
agpgart: Putting AGP V2 device at 0000:00:00.0 into 2x mode
agpgart: Putting AGP V2 device at 0000:01:00.0 into 2x mode
[drm] Setting GART location based on old memory map
[drm] writeback test succeeded in 1 usecs
[chris:~]$

As you can see, after a few packets, the ping application hangs and
after that point, all network accesses fail. There are no error
messages written to the logs when the network dies. I can restart the
network by simply unloading and reloading the driver. This hang does
not occur with a different wireless card that uses the rtl8180 driver.

My config and the output from dmesg (after reloading the driver) are
attached. I have Ralink debugfs enabled so can provide any additional
diagnostics that may be helpful from that source.

(I should perhaps add that I am sure that this is not the same problem
I reported tthrough bugzilla (bug 9860) a few weeks ago, which it
seems was a problem with my AP/router. Since resetting my AP/Router, I
can reboot to 2.6.24.2 and the wireless network works reliably with
the same hardware.)

The hardware is a Belkin F5D7010 802.11g Notebook card communicating
with a Draytek Vigor 2600 802.11b combined AP/Router/Broadband Modem.

I will be more than happy to provide additional diagnostics, but
please bear in mind that I am not a git user, so cannot do bisects. I
am, however, perfectly capable of applying or reverting patches,
rebuilding and re-testing, so I am quite happy to do that.

Thanks in advance.

Chris

Download attachment "rt61pci_dies" of type "application/octet-stream" (1104 bytes)

Download attachment ".config" of type "application/octet-stream" (48634 bytes)