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| author | Michael Buesch <mb@bu3sch.de> | 2009-09-12 00:52:48 +0200 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2009-09-23 11:35:44 -0400 |
| commit | 09ebe2f94373e95952ed6340b0a5d21739eb99da (patch) | |
| tree | 514473303a20ab15fa1ef5100a00c79ac3ad443e | |
| parent | 990b86f4f9c54f83085d4136498ac44719b17654 (diff) | |
| download | lwn-09ebe2f94373e95952ed6340b0a5d21739eb99da.tar.gz lwn-09ebe2f94373e95952ed6340b0a5d21739eb99da.zip | |
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 <mb@bu3sch.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
| -rw-r--r-- | drivers/net/wireless/b43/main.c | 14 |
1 files changed, 14 insertions, 0 deletions
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) |