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ath10k: fix invalid NSS for 4x4 devices

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commit f680f70adb upstream.

The number of spatial streams that are derived from chain mask
for 4x4 devices is using wrong bitmask and conditional check.
This is affecting downlink throughput for QCA99x0 devices. Earlier
cfg_tx_chainmask is not filled by default until user configured it
and so get_nss_from_chainmask never be called. This issue is exposed
by recent commit 166de3f189 ("ath10k: remove supported chain mask").
By default maximum supported chain mask is filled in cfg_tx_chainmask.

Fixes: 5572a95b4b ("ath10k: apply chainmask settings to vdev on creation")
Signed-off-by: Rajkumar Manoharan <rmanohar@qti.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Rajkumar Manoharan
2015-11-03 11:51:33 +05:30
committed by Greg Kroah-Hartman
parent d3a80fbec2
commit 72c82827d9
1 changed files with 1 additions and 1 deletions
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2
drivers/net/wireless/ath/ath10k/mac.c
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@@ -3183,7 +3183,7 @@ static int ath10k_config(struct ieee80211_hw *hw, u32 changed)
static u32 get_nss_from_chainmask(u16 chain_mask)
{
if ((chain_mask & 0x15) == 0x15)
if ((chain_mask & 0xf) == 0xf)
return 4;
else if ((chain_mask & 0x7) == 0x7)
return 3;