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Re: [BISECTED] [PATCH v2 8/8] rt2x00: Properly request tx headroom for alignment operations.

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Quoting Gertjan van Wingerde <gwingerde@xxxxxxxxx>:

On 12/20/09 16:42, Markus Baier wrote:
After my latest git pull to the kernel version 2.6.33-rc1-wl
no client was able to connect to my hostapd (v0.6.9) AP.
I found a lot of the following entries in the syslog:

wlan0: STA xx:xx:xx:xx:xx:xx
IEEE 802.11: did not acknowledge authentication response

I'm also having problems with rt2x00 support the current wireless-testing, but in the station mode. The device is using rt61pci driver. Association to an AP with WEP fails.

[  147.930019] wlan2: direct probe to AP 00:11:6b:28:0b:92 (try 1)
[  148.130010] wlan2: direct probe to AP 00:11:6b:28:0b:92 (try 2)
[  148.330009] wlan2: direct probe to AP 00:11:6b:28:0b:92 (try 3)
[  148.530008] wlan2: direct probe to AP 00:11:6b:28:0b:92 timed out
[  152.942516] wlan2: direct probe to AP 00:11:6b:28:0b:92 (try 1)
[  153.142512] wlan2: direct probe to AP 00:11:6b:28:0b:92 (try 2)
[  153.340011] wlan2: direct probe to AP 00:11:6b:28:0b:92 (try 3)
[  153.540008] wlan2: direct probe to AP 00:11:6b:28:0b:92 timed out

It worked fine with wireless-testing when it was 2.6.32 based.

After I removed the lines below in rt2x00dev.c:

That "patch" is helping me too!  The association is working now.

That is very strange as this patch was meant to send TX statuses of frames
towards monitor interfaces (which is what hostapd is using).

I'm not using monitor mode.  I only have one vif in the station mode.

My debugging shows that the headroom is 0 with the "patch". Without it, the headroom is 17 (13 from IEEE80211_TX_STATUS_HEADROOM plus 4 from RT2X00_ALIGN_SIZE).

Perhaps non-zero headroom is not handled correctly?

--
Regards,
Pavel Roskin
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