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From: Evan Green <evgreen@chromium.org>
To: Kalle Valo <kvalo@codeaurora.org>
Cc: kuabhs@google.com.org, sujitka@chromium.org,
	Evan Green <evgreen@chromium.org>,
	"David S. Miller" <davem@davemloft.net>,
	Govind Singh <govinds@qti.qualcomm.com>,
	Jakub Kicinski <kuba@kernel.org>,
	Michal Kazior <michal.kazior@tieto.com>,
	ath10k@lists.infradead.org, linux-kernel@vger.kernel.org,
	linux-wireless@vger.kernel.org, netdev@vger.kernel.org
Subject: [PATCH] ath10k: Acquire tx_lock in tx error paths
Date: Thu,  4 Jun 2020 10:59:11 -0700	[thread overview]
Message-ID: <20200604105901.1.I5b8b0c7ee0d3e51a73248975a9da61401b8f3900@changeid> (raw)

ath10k_htt_tx_free_msdu_id() has a lockdep assertion that htt->tx_lock
is held. Acquire the lock in a couple of error paths when calling that
function to ensure this condition is met.

Fixes: 6421969f248fd ("ath10k: refactor tx pending management")
Fixes: e62ee5c381c59 ("ath10k: Add support for htt_data_tx_desc_64
descriptor")
Signed-off-by: Evan Green <evgreen@chromium.org>
---

 drivers/net/wireless/ath/ath10k/htt_tx.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/wireless/ath/ath10k/htt_tx.c b/drivers/net/wireless/ath/ath10k/htt_tx.c
index e9d12ea708b62..e8c00af2cce1d 100644
--- a/drivers/net/wireless/ath/ath10k/htt_tx.c
+++ b/drivers/net/wireless/ath/ath10k/htt_tx.c
@@ -1545,7 +1545,9 @@ static int ath10k_htt_tx_32(struct ath10k_htt *htt,
 err_unmap_msdu:
 	dma_unmap_single(dev, skb_cb->paddr, msdu->len, DMA_TO_DEVICE);
 err_free_msdu_id:
+	spin_lock_bh(&htt->tx_lock);
 	ath10k_htt_tx_free_msdu_id(htt, msdu_id);
+	spin_unlock_bh(&htt->tx_lock);
 err:
 	return res;
 }
@@ -1752,7 +1754,9 @@ static int ath10k_htt_tx_64(struct ath10k_htt *htt,
 err_unmap_msdu:
 	dma_unmap_single(dev, skb_cb->paddr, msdu->len, DMA_TO_DEVICE);
 err_free_msdu_id:
+	spin_lock_bh(&htt->tx_lock);
 	ath10k_htt_tx_free_msdu_id(htt, msdu_id);
+	spin_unlock_bh(&htt->tx_lock);
 err:
 	return res;
 }
-- 
2.24.1


WARNING: multiple messages have this Message-ID
From: Evan Green <evgreen@chromium.org>
To: Kalle Valo <kvalo@codeaurora.org>
Cc: Govind Singh <govinds@qti.qualcomm.com>,
	kuabhs@google.com.org, sujitka@chromium.org,
	netdev@vger.kernel.org, linux-wireless@vger.kernel.org,
	linux-kernel@vger.kernel.org, Evan Green <evgreen@chromium.org>,
	ath10k@lists.infradead.org,
	Michal Kazior <michal.kazior@tieto.com>,
	Jakub Kicinski <kuba@kernel.org>,
	"David S. Miller" <davem@davemloft.net>
Subject: [PATCH] ath10k: Acquire tx_lock in tx error paths
Date: Thu,  4 Jun 2020 10:59:11 -0700	[thread overview]
Message-ID: <20200604105901.1.I5b8b0c7ee0d3e51a73248975a9da61401b8f3900@changeid> (raw)

ath10k_htt_tx_free_msdu_id() has a lockdep assertion that htt->tx_lock
is held. Acquire the lock in a couple of error paths when calling that
function to ensure this condition is met.

Fixes: 6421969f248fd ("ath10k: refactor tx pending management")
Fixes: e62ee5c381c59 ("ath10k: Add support for htt_data_tx_desc_64
descriptor")
Signed-off-by: Evan Green <evgreen@chromium.org>
---

 drivers/net/wireless/ath/ath10k/htt_tx.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/wireless/ath/ath10k/htt_tx.c b/drivers/net/wireless/ath/ath10k/htt_tx.c
index e9d12ea708b62..e8c00af2cce1d 100644
--- a/drivers/net/wireless/ath/ath10k/htt_tx.c
+++ b/drivers/net/wireless/ath/ath10k/htt_tx.c
@@ -1545,7 +1545,9 @@ static int ath10k_htt_tx_32(struct ath10k_htt *htt,
 err_unmap_msdu:
 	dma_unmap_single(dev, skb_cb->paddr, msdu->len, DMA_TO_DEVICE);
 err_free_msdu_id:
+	spin_lock_bh(&htt->tx_lock);
 	ath10k_htt_tx_free_msdu_id(htt, msdu_id);
+	spin_unlock_bh(&htt->tx_lock);
 err:
 	return res;
 }
@@ -1752,7 +1754,9 @@ static int ath10k_htt_tx_64(struct ath10k_htt *htt,
 err_unmap_msdu:
 	dma_unmap_single(dev, skb_cb->paddr, msdu->len, DMA_TO_DEVICE);
 err_free_msdu_id:
+	spin_lock_bh(&htt->tx_lock);
 	ath10k_htt_tx_free_msdu_id(htt, msdu_id);
+	spin_unlock_bh(&htt->tx_lock);
 err:
 	return res;
 }
-- 
2.24.1


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ath10k@lists.infradead.org
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             reply	other threads:[~2020-06-04 17:59 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-06-04 17:59 Evan Green [this message]
2020-06-04 17:59 ` Evan Green
2020-06-08 11:38 ` Kalle Valo
2020-06-08 11:38   ` Kalle Valo
2020-06-08 16:07   ` Evan Green
2020-06-08 16:07     ` Evan Green
2020-06-09  6:23 ` Kalle Valo
2020-06-09  6:23 ` Kalle Valo

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