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iwlagn: fix TID use bug

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commit 9a215e40d7 upstream.

The driver everywhere uses max TID count as 9,
which is wrong, it should be 8.

I think the reason it uses 9 here is off-by-one
confusion by whoever wrote this. We do use the
value IWL_MAX_TID_COUNT for "not QoS/no TID"
but that is completely correct even if it is 8
and not 9 since 0-7 are only valid.

As a side effect, this fixes the following bug:

 Open BA session requested for 00:23:cd:16:8a:7e tid 8
 ------------[ cut here ]------------
 kernel BUG at drivers/net/wireless/iwlwifi/iwl-trans-pcie-int.h:350!
 ...

when you do
echo "tx start 8" > /sys/kernel/debug/ieee80211/*/*/*/*/agg_status

Reported-by: Nikolay Martynov <mar.kolya@gmail.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Johannes Berg
2011-12-02 12:22:54 -08:00
committed by Greg Kroah-Hartman
parent 585ea9bc67
commit 01b366aa69
1 changed files with 1 additions and 1 deletions
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2
drivers/net/wireless/iwlwifi/iwl-commands.h
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@@ -809,7 +809,7 @@ struct iwl_qosparam_cmd {
#define IWLAGN_STATION_COUNT 16
#define IWL_INVALID_STATION 255
#define IWL_MAX_TID_COUNT 9
#define IWL_MAX_TID_COUNT 8
#define STA_FLG_TX_RATE_MSK cpu_to_le32(1 << 2)
#define STA_FLG_PWR_SAVE_MSK cpu_to_le32(1 << 8)