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From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Johannes Berg <johannes.berg@intel.com>,
	Danny Alexander <danny.alexander@intel.com>,
	Luca Coelho <luciano.coelho@intel.com>,
	Sasha Levin <sashal@kernel.org>,
	linux-wireless@vger.kernel.org, netdev@vger.kernel.org
Subject: [PATCH AUTOSEL 4.19 136/671] iwlwifi: mvm: fix A-MPDU reference assignment
Date: Thu, 16 Jan 2020 11:50:45 -0500
Message-ID: <20200116165940.10720-19-sashal@kernel.org> (raw)
In-Reply-To: <20200116165940.10720-1-sashal@kernel.org>

From: Johannes Berg <johannes.berg@intel.com>

[ Upstream commit 1f7698abedeeb3fef3cbcf78e16f925df675a179 ]

The current code assigns the reference, and then goes to increment
it if the toggle bit has changed. That way, we get

Toggle  0  0  0  0  1  1  1  1
ID      1  1  1  1  1  2  2  2

Fix that by assigning the post-toggle ID to get

Toggle  0  0  0  0  1  1  1  1
ID      1  1  1  1  2  2  2  2

Reported-by: Danny Alexander <danny.alexander@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Fixes: fbe4112791b8 ("iwlwifi: mvm: update mpdu metadata API")
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c b/drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c
index 036d1d82d93e..77e369453642 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c
@@ -1077,7 +1077,6 @@ void iwl_mvm_rx_mpdu_mq(struct iwl_mvm *mvm, struct napi_struct *napi,
 			he_phy_data = le64_to_cpu(desc->v1.he_phy_data);
 
 		rx_status->flag |= RX_FLAG_AMPDU_DETAILS;
-		rx_status->ampdu_reference = mvm->ampdu_ref;
 		/* toggle is switched whenever new aggregation starts */
 		if (toggle_bit != mvm->ampdu_toggle) {
 			mvm->ampdu_ref++;
@@ -1092,6 +1091,7 @@ void iwl_mvm_rx_mpdu_mq(struct iwl_mvm *mvm, struct napi_struct *napi,
 						RX_FLAG_AMPDU_EOF_BIT;
 			}
 		}
+		rx_status->ampdu_reference = mvm->ampdu_ref;
 	}
 
 	rcu_read_lock();
-- 
2.20.1


  parent reply index

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <20200116165940.10720-1-sashal@kernel.org>
2020-01-16 16:50 ` [PATCH AUTOSEL 4.19 132/671] iwlwifi: mvm: avoid possible access out of array Sasha Levin
2020-01-16 16:50 ` Sasha Levin [this message]
2020-01-16 16:51 ` [PATCH AUTOSEL 4.19 153/671] iwlwifi: mvm: fix RSS config command Sasha Levin
2020-01-16 16:51 ` [PATCH AUTOSEL 4.19 159/671] ath10k: fix dma unmap direction for management frames Sasha Levin
2020-01-16 16:51 ` [PATCH AUTOSEL 4.19 187/671] mt76: usb: fix possible memory leak in mt76u_buf_free Sasha Levin
2020-01-16 16:51 ` [PATCH AUTOSEL 4.19 196/671] brcmfmac: create debugfs files for bus-specific layer Sasha Levin
2020-01-16 16:52 ` [PATCH AUTOSEL 4.19 224/671] ath10k: Fix length of wmi tlv command for protected mgmt frames Sasha Levin

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