2008/10/13 Luis R. Rodriguez <mcgrof@xxxxxxxxx>: > On Mon, Oct 13, 2008 at 8:05 AM, <bugme-daemon@xxxxxxxxxxxxxxxxxxx> wrote: >> http://bugzilla.kernel.org/show_bug.cgi?id=11749 > > --- > Bug description from kernel.org bugzilla > > Latest working kernel version: None > Earliest failing kernel version: Unknow > Distribution: all > Hardware Environment: Atheros wireless chipset > Software Environment: Fedora > Problem Description: ath5k driver has many inperrupts per second although the > system is idle. > > I used AspierOne to test it, interrupts are so many that CPU's C3 residence > time is only 20 milliseconds or less, there isn't any valid traffic on my > wireless network except beacon frame. > > I tested X61 in the same wireless environment, number of interrupt is only 1 > per second, X61 has the latest Intel wireless chipset and 2.6.27 kernel was > running. > > So i think ath5k and ath9k should can do as Intel wireless driver does, > otherwise, CPU can't stay at C3 with longer time because of wireless > interrupts. > > Steps to reproduce: > 1. Enable wireless on platform with Atheros wireless chipset. > 2. watch cat /proc/interrupts > > --- > > Folks, ANI is not handled yet in ath5k (and won't be on 2.6.26). What > I recommend is to try disabling MIB interrupts on the stable kernels > where you won't make use of MIB statistics, which you need for ANI. > Once you have ANI please enable the MIB interrupt. > > yang.y.yi, please try this patch (also attached for your convenience) > and let us know if you see a difference. > > Luis > > diff --git a/drivers/net/wireless/ath5k/base.c > b/drivers/net/wireless/ath5k/base.c > index 0676c6d..c18ead9 100644 > --- a/drivers/net/wireless/ath5k/base.c > +++ b/drivers/net/wireless/ath5k/base.c > @@ -2246,8 +2246,7 @@ ath5k_init(struct ath5k_softc *sc) > * Enable interrupts. > */ > sc->imask = AR5K_INT_RX | AR5K_INT_TX | AR5K_INT_RXEOL | > - AR5K_INT_RXORN | AR5K_INT_FATAL | AR5K_INT_GLOBAL | > - AR5K_INT_MIB; > + AR5K_INT_RXORN | AR5K_INT_FATAL | AR5K_INT_GLOBAL; > > ath5k_hw_set_intr(sc->ah, sc->imask); > /* Set ack to be sent at low bit-rates */ > Acked-by: Nick Kossifidis <mickflemm@xxxxxxxxx> -- GPG ID: 0xD21DB2DB As you read this post global entropy rises. Have Fun ;-) Nick -- 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
