From: Michael Buesch Date: Fri, 11 Sep 2009 22:52:48 +0000 (+0200) Subject: b43: Disable PMQ mechanism X-Git-Tag: firefly_0821_release~11864^2~297^2~28 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=09ebe2f94373e95952ed6340b0a5d21739eb99da;p=firefly-linux-kernel-4.4.55.git b43: Disable PMQ mechanism This reduces IRQ pressure by about one third on a saturated link by disabling the PMQ mechanism. We currently don't use that mechanism. Signed-off-by: Michael Buesch Signed-off-by: John W. Linville --- diff --git a/drivers/net/wireless/b43/main.c b/drivers/net/wireless/b43/main.c index 6468bbeba687..7fa947ca7c32 100644 --- a/drivers/net/wireless/b43/main.c +++ b/drivers/net/wireless/b43/main.c @@ -2675,6 +2675,20 @@ static void b43_adjust_opmode(struct b43_wldev *dev) cfp_pretbtt = 50; } b43_write16(dev, 0x612, cfp_pretbtt); + + /* FIXME: We don't currently implement the PMQ mechanism, + * so always disable it. If we want to implement PMQ, + * we need to enable it here (clear DISCPMQ) in AP mode. + */ + if (0 /* ctl & B43_MACCTL_AP */) { + b43_write32(dev, B43_MMIO_MACCTL, + b43_read32(dev, B43_MMIO_MACCTL) + & ~B43_MACCTL_DISCPMQ); + } else { + b43_write32(dev, B43_MMIO_MACCTL, + b43_read32(dev, B43_MMIO_MACCTL) + | B43_MACCTL_DISCPMQ); + } } static void b43_rate_memory_write(struct b43_wldev *dev, u16 rate, int is_ofdm)