Re: fyi: scheduling while atomic dmesg output 3.12-rc1

[Hauke Mehrtens <hauke@hauke-m.de>]

On 09/18/2013 11:19 AM, Arend van Spriel wrote:
> On 09/17/2013 07:45 PM, Joe Perches wrote:
>> <3>[   11.206312] BUG: scheduling while atomic:
>> NetworkManager/866/0x00000200
> 
> Thanks, Joe
> 
> I got a report on this few days ago. It was introduced by bcma API
> change and I already sent email to the committer of that change, ie.
> Hauke Mehrtens. Hope it will be settled soon how to fix this.
> 
> Gr. AvS

Hi,

I see four solutions for the problem:

1. convert the usleep_range(1000, 2000) into udelay(1000) in
drivers/bcma/driver_pci.c

2. remove the call of bcma_core_pci_power_save() from bcma_core_pci_up()
so that it does not get called by brcmsmac.

3. remove the call of bcma_core_pci_power_save() from bcma_core_pci_up()
and move the call to somewhere out of the big spin lock.

4. convert the big brmcsmac spin lock into a mutex lock and use an
additional spin lock for the parts where it is actually needed.

For 3.12 I am for solution 1 or 2 and for the long term 3.13? I am for
solution 4, but that needs bigger changes.

Hauke