On Mon, 5 Mar 2012, Stefan Lippers-Hollmann wrote: > On Monday 05 March 2012, Sven Joachim wrote: > > On 2012-02-28 02:05 +0100, Greg KH wrote: > > > > > 3.2-stable review patch. If anyone has any objections, please let me know. > > > > Alas, the commit below broke the WiFi on my laptop, where > > "iwlist wlan0 scan" now just reports: " wlan0 No scan results". > > > > This is not specific to 3.2, the same problem exists in 3.0.23 and > > 3.3-rc6 while previous releases worked. > > I can confirm this regression on an old PIII based notebook with a > 32 bit BCM4306/3 PCMCIA card: > > 02:00.0 Network controller [0280]: Broadcom Corporation BCM4306 802.11b/g Wireless LAN Controller [14e4:4320] (rev 03) > Subsystem: Linksys WPC54G v1 / WPC54GS v1 802.11g Wireless-G Notebook Adapter [1737:4320] > Flags: bus master, fast devsel, latency 64, IRQ 10 > Memory at 20000000 (32-bit, non-prefetchable) [size=8K] > Capabilities: [40] Power Management version 2 > Kernel driver in use: b43-pci-bridge > > I can observe these differences in the dmesg output (3.2.9 + current > stable queue-3.2): > > The kernel configuration is identical in both cases, the only > difference is "genirq: Unmask oneshot irqs when thread was not woken" > being applied or not. > > --- working <-- 3.2.9 + current stable queue-3.2, with "genirq: Unmask oneshot irqs when thread was not woken" reverted > +++ broken <-- 3.2.9 + current stable queue-3.2 > @@ -125,6 +125,7 @@ Initializing cgroup subsys freezer > Initializing cgroup subsys net_cls > Initializing cgroup subsys blkio > Initializing cgroup subsys perf_event > +CPU serial number disabled. I can't see why reverting that genirq patch would cause this. > mce: CPU supports 5 MCE banks > SMP alternatives: switching to UP code > Freeing SMP alternatives: 8k freed > @@ -137,9 +138,16 @@ SMP disabled > Performance Events: > no APIC, boot with the "lapic" boot parameter to force-enable it. > no hardware sampling interrupt available. > -Broken PMU hardware detected, using software events only. > +p6 PMU driver. > +... version: 0 > +... bit width: 32 > +... generic registers: 2 > +... value mask: 00000000ffffffff > +... max period: 000000007fffffff > +... fixed-purpose events: 0 > +... event mask: 0000000000000003 Ditto. > Brought up 1 CPUs > Total of 1 processors activated (1989.75 BogoMIPS). > devtmpfs: initialized > PM: Registering ACPI NVS region at eeff000 (4096 bytes) > print_constraints: dummy: > @@ -174,12 +182,12 @@ pci 0000:00:00.0: reg 10: [mem 0xec00000 > type 1 class 0x000604 > pci 0000:00:01.0: supports D1 > type 2 class 0x000607 > -pci 0000:00:04.0: reg 10: [mem 0x10000000-0x10000fff] > +pci 0000:00:04.0: reg 10: [mem 0x00000000-0x00000fff] Even more. There is something extremly fishy. Thanks, tglx -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
