Bug in ipw3945

I have interesting problem:
Sometimes my laptop ASUS v6j hangs. I think that this problem in kernel module ipw3945.ko.
In favor of my theory may be this fragment of kern.log:
Jan 14 22:04:21 kally kernel: [17189233.664000] NVRM: Xid (0001:00): 6, PE0002 0380 00000000 00000030 ffffffff 0008a5c5
Jan 14 22:04:21 kally kernel: [17189233.668000] NVRM: Xid (0001:00): 28, L0 -> L0
Jan 14 22:04:21 kally kernel: [17189233.712000] NVRM: Xid (0001:00): 6, PE0002 1d7c ffff0000 00000000 ffffffff 00000000
Jan 14 22:04:21 kally kernel: [17189237.716000] NVRM: Xid (0001:00): 28, L1 -> L0
Jan 14 22:04:21 kally kernel: [17189237.720000] ipw3945: Microcode SW error detected. Restarting.
Jan 14 22:04:21 kally kernel: [17189237.720000] ipw3945: request scan called when driver not ready.
Jan 14 22:04:21 kally kernel: [17189241.668000] NVRM: Xid (0001:00): 26, Ch 00000002 M 00001d7c D ffff0000 intr 00400000
Jan 14 22:04:21 kally kernel: [17189241.684000] NVRM: Xid (0001:00): 28, L1 -> L0
Jan 14 22:04:21 kally kernel: [17189241.684000] ipw3945: Error sending ADD_STA: time out after 500ms.
Jan 14 22:04:21 kally kernel: [17189241.684000] ipw3945: Can't stop Rx DMA.
Jan 14 22:04:21 kally kernel: [17189246.908000] NVRM: Xid (0001:00): 26, Ch 00000000 M 00001d7c D ffff0000 intr 00400000
Jan 14 22:04:21 kally kernel: [17189246.916000] NVRM: Xid (0001:00): 28, L0 -> L0
Jan 14 22:04:21 kally kernel: [17189246.916000] ipw3945: Detected geography ABG (13 802.11bg channels, 23 802.11a channels)
Jan 14 22:04:31 kally kernel: [17189251.100000] NVRM: Xid (0001:00): 26, Ch 00000000 M 00001d7c D ffff0000 intr 00400000
Jan 14 22:04:31 kally kernel: [17189254.980000] NVRM: Xid (0001:00): 26, Ch 00000000 M 00001d7c D ffff0000 intr 00400000
Jan 14 22:04:45 kally kernel: [17189261.120000] NVRM: Xid (0001:00): 26, Ch 00000000 M 00001d7c D ffff0000 intr 00400000
Jan 14 22:04:45 kally kernel: [17189265.000000] NVRM: Xid (0001:00): 26, Ch 0000001e M 00001d7c D ffff0000 intr 00400000
Jan 14 22:04:45 kally kernel: [17189265.004000] ipw3945: Microcode SW error detected. Restarting.
Jan 14 22:04:45 kally kernel: [17189265.004000] ipw3945: request scan called when driver not ready.
Jan 14 22:04:45 kally kernel: [17189269.212000] NVRM: Xid (0001:00): 26, Ch 00000000 M 00001d7c D ffff0000 intr 00400000
Jan 14 22:04:45 kally kernel: [17189269.216000] ipw3945: Error sending ADD_STA: time out after 500ms.
Jan 14 22:04:45 kally kernel: [17189269.216000] ipw3945: Can't stop Rx DMA.
Jan 14 22:04:45 kally kernel: [17189270.572000] ipw3945: Detected geography ABG (13 802.11bg channels, 23 802.11a channels)
Jan 14 22:04:55 kally kernel: [17189275.932000] NVRM: Xid (0001:00): 26, Ch 00000000 M 00001d7c D ffff0000 intr 00400000
Jan 14 22:04:55 kally kernel: [17189279.812000] NVRM: Xid (0001:00): 26, Ch 00000000 M 00001d7c D ffff0000 intr 00400000
Jan 14 22:04:56 kally kernel: [17189281.064000] ipw3945: Detected geography ABG (13 802.11bg channels, 23 802.11a channels)

Also when I switch to console, I have error:
soft lockup detected on CPU#0!

My еnvironment:
ubuntu edgy

linux-restricted-modules-2.6.17-10-386 2.6.17.7-10.1
linux-image-2.6.17-10-386 2.6.17.1-10.34