Odd behavior of ssb, b43, b43legacy, and b44
Larry Finger
Larry.Finger at lwfinger.net
Thu Jan 6 15:07:37 EST 2011
Michael,
On one of my boxes, I have installed two PCI-format BCM43xx cards for testing.
One is a BCM4306 Rev. 3, which uses b43. The other is a BCM4303, which uses
b43legacy. The output of lspci -nn for these devices is
01:09.0 Network controller [0280]: Broadcom Corporation BCM4306 802.11b/g
Wireless LAN Controller [14e4:4320] (rev 03)
01:0a.0 Network controller [0280]: Broadcom Corporation BCM4303 802.11b Wireless
LAN Controller [14e4:4301] (rev 02)
Upon booting, I noticed the following messages in the log:
b44: b44.c:v2.0
b44: Invalid MAC address found in EEPROM
b44 ssb1:1: Problem fetching invariants of chip, aborting
b44: probe of ssb1:1 failed with error -22
As this box does not have a b44 installed, I wondered why this was happening.
When I unloaded all the drivers and used modprobe to load ssb, I found that b43,
b43legacy and b44 were all loaded. The console output is
finger at pam:~> lsmod | grep b4 <== none loaded
finger at pam:~> sudo modprobe -v ssb <== load ssb
insmod /lib/modules/2.6.37-wl+/kernel/drivers/ssb/ssb.ko
The above looks normal, but look at what is now resident!
finger at pam:~> lsmod | grep b4
b43legacy 115302 0
b44 28767 0
b43 174321 0
ssb 38157 3 b43legacy,b44,b43
mac80211 266240 2 b43legacy,b43
cfg80211 161930 3 b43legacy,b43,mac80211
Any idea why loading ssb should silently load b43legacy AND b44? Any ideas on
where to look?
Thanks,
Larry
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