From 6a62e5ef94f754892734f99e87ca3dedd3cef277 Mon Sep 17 00:00:00 2001 From: Josef Bacik Date: Sun, 15 Nov 2009 21:33:18 -0500 Subject: [PATCH] rt2800: do not enable tbtt unless we are in a beacon mode Please be gentle, I'm a fs developer and this is my first foray into drivers, as I'm tired of building ralinks driver everytime I update my kernel. Whenever I load the rt2800pci driver my box bogs down, and a few printk's later I discovered its because I was getting 10's of thousands of TBTT interrupts a second. I discovered this was because we were setting the beacon timer to 0, which is apparently what TBTT keys off of. It seems to me that we should only be enabling TBTT when we are in a beacon transmitting mode, which from what I can tell is in AD-HOC and other such modes where the mac80211 layer would have given us a proper beacon_int to set the beacon timer to instead of 0. So this is my fix, only enable TBTT if our sync mode is for beacon. This makes it so my box doesn't die everytime I load the rt2800pci driver. Let me know if this is acceptable, I just learned all these terms about 15 minutes ago via wikipedia, so I really am not familiar with how this stuff is supposed to work. Thanks, Signed-off-by: Josef Bacik Acked-by: Ivo van Doorn Signed-off-by: John W. Linville --- drivers/net/wireless/rt2x00/rt2800lib.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/net/wireless/rt2x00/rt2800lib.c b/drivers/net/wireless/rt2x00/rt2800lib.c index 621dac18ca6..e94f1e13fea 100644 --- a/drivers/net/wireless/rt2x00/rt2800lib.c +++ b/drivers/net/wireless/rt2x00/rt2800lib.c @@ -561,7 +561,8 @@ void rt2800_config_intf(struct rt2x00_dev *rt2x00dev, struct rt2x00_intf *intf, rt2800_register_read(rt2x00dev, BCN_TIME_CFG, ®); rt2x00_set_field32(®, BCN_TIME_CFG_TSF_TICKING, 1); rt2x00_set_field32(®, BCN_TIME_CFG_TSF_SYNC, conf->sync); - rt2x00_set_field32(®, BCN_TIME_CFG_TBTT_ENABLE, 1); + rt2x00_set_field32(®, BCN_TIME_CFG_TBTT_ENABLE, + (conf->sync == TSF_SYNC_BEACON)); rt2800_register_write(rt2x00dev, BCN_TIME_CFG, reg); } -- 2.39.3