From 09ebe2f94373e95952ed6340b0a5d21739eb99da Mon Sep 17 00:00:00 2001 From: Michael Buesch Date: Sat, 12 Sep 2009 00:52:48 +0200 Subject: 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 --- drivers/net/wireless/b43/main.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) (limited to 'drivers/net') diff --git a/drivers/net/wireless/b43/main.c b/drivers/net/wireless/b43/main.c index 6468bbeba68..7fa947ca7c3 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) -- cgit v1.2.3