Do you have a version that applies to 3.5 and earlier? On Tue, Jun 12, 2012 at 08:13:43PM +0530, Mohammed Shafi Shajakhan wrote: > From: Mohammed Shafi Shajakhan <mohammed@xxxxxxxxxxxxxxxx> > > steps to recreate: > load latest ath9k driver with AR9485 > stop the network-manager and wpa_supplicant > bring the interface up > > Call Trace: > [<ffffffffa0517490>] ? ath_hw_check+0xe0/0xe0 [ath9k] > [<ffffffff812cd1e8>] __const_udelay+0x28/0x30 > [<ffffffffa03bae7a>] ar9003_get_pll_sqsum_dvc+0x4a/0x80 [ath9k_hw] > [<ffffffffa05174eb>] ath_hw_pll_work+0x5b/0xe0 [ath9k] > [<ffffffff810744fe>] process_one_work+0x11e/0x470 > [<ffffffff8107530f>] worker_thread+0x15f/0x360 > [<ffffffff810751b0>] ? manage_workers+0x230/0x230 > [<ffffffff81079af3>] kthread+0x93/0xa0 > [<ffffffff815fd3a4>] kernel_thread_helper+0x4/0x10 > [<ffffffff81079a60>] ? kthread_freezable_should_stop+0x70/0x70 > [<ffffffff815fd3a0>] ? gs_change+0x13/0x13 > > ensure that the PLL-WAR for AR9485/AR9340 is executed only if the STA is > associated (or) IBSS/AP mode had started beaconing. Ideally this WAR > is needed to recover from some rare beacon stuck during stress testing. > Before the STA is associated/IBSS had started beaconing, PLL4(0x1618c) > always seem to have zero even though we had configured PLL3(0x16188) to > query about PLL's locking status. When we keep on polling infinitely PLL4's > 8th bit(ie check for PLL locking measurements is done), machine hangs > due to softlockup. > > fixes https://bugzilla.redhat.com/show_bug.cgi?id=811142 > > Reported-by: Rolf Offermanns <rolf.offermanns@xxxxxxx> > Cc: stable@xxxxxxxxxxxxxxx > Tested-by: Mohammed Shafi Shajakhan <mohammed@xxxxxxxxxxxxxxxx> > Signed-off-by: Mohammed Shafi Shajakhan <mohammed@xxxxxxxxxxxxxxxx> > --- > drivers/net/wireless/ath/ath9k/link.c | 8 ++++++++ > 1 files changed, 8 insertions(+), 0 deletions(-) > > diff --git a/drivers/net/wireless/ath/ath9k/link.c b/drivers/net/wireless/ath/ath9k/link.c > index 0cc4c70..a105c94 100644 > --- a/drivers/net/wireless/ath/ath9k/link.c > +++ b/drivers/net/wireless/ath/ath9k/link.c > @@ -136,6 +136,14 @@ void ath_hw_pll_work(struct work_struct *work) > u32 pll_sqsum; > struct ath_softc *sc = container_of(work, struct ath_softc, > hw_pll_work.work); > + /* > + * ensure that the PLL WAR is executed only > + * after the STA is associated (or) if the > + * beaconing had started in interfaces that > + * uses beacons. > + */ > + if (!test_bit(SC_OP_BEACONS, &sc->sc_flags)) > + return; > > ath9k_ps_wakeup(sc); > pll_sqsum = ar9003_get_pll_sqsum_dvc(sc->sc_ah); > -- > 1.7.0.4 > > -- John W. Linville Someday the world will need a hero, and you linville@xxxxxxxxxxxxx might be all we have. Be ready. -- 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
