Hi Johannes, i found this bug report with your response: https://bugzilla.redhat.com/show_bug.cgi?id=990955 "I don't think adding a workqueue is a good idea because that would significantly delay the calls in many situations." The problem on ath9k_htc is that the call is already dramatically delayed. It will try to send WMI command over USB with delay of some _msec_ not usec. There are two options right now, use workqueue or do not support sta_rc_update. Am 24.01.2014 07:55, schrieb mail@xxxxxxxxxxxxxxxx: > Hello Antonio, > >> Just as a generic suggestion, have you tried testing a slightly older >> kernel versions to see if that makes any difference? > > Thanks for the suggestion. I will try to use a older kernel version, but it will take some days to be > sure if it works again (and I naturally will report about). > > -- > Flo > >> On 23/01/14 23:03, Antonio Quartulli wrote: >> Von: "Antonio Quartulli" <antonio@xxxxxxxxxxxxxx> >> An: "Oleksij Rempel" <linux@xxxxxxxxxxxxxxxx>, mail@xxxxxxxxxxxxxxxx, ath9k-devel@xxxxxxxxxxxxxxx, "Antonio Quartulli" <ordex@xxxxxxxxxxxxx> >> Betreff: Re: [ath9k-devel] [BUG] Atheros AR7010+AR9287: Scheduling while atomic: ksoftirqd/0/3/0x00000302 >> >> Hi all, >> >> On 23/01/14 20:44, Oleksij Rempel wrote: >>> Hi Antonio, >>> >>> You probably know more about this issue then me. >>> >>> Insight of this mutex are some WMI commands, which are incredible slow >>> on some USB 2.0 devices. >>> >> >> I implemented the ath9k_htc_sta_rc_update() API but I don't really know >> the internals of the ath9k_htc driver...therefore I don't know if these >> WMI commands have any consequence on this..Could it be that this >> slowness is triggering some reaction in the kernel (due to the fact that >> this part of the code is executed while holding a lock)? >> >> Sorry, but I can't really help. >> >> Just as a generic suggestion, have you tried testing a slightly older >> kernel versions to see if that makes any difference? >> >> >> >> -- >> Antonio Quartulli -- Regards, Oleksij
Attachment:
signature.asc
Description: OpenPGP digital signature
