From: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
To: kvalo@codeaurora.org, linux-wireless@vger.kernel.org,
wcn36xx@lists.infradead.org
Cc: loic.poulain@linaro.org, benl@squareup.com,
daniel.thompson@linaro.org, johannes@sipsolutions.net,
bryan.odonoghue@linaro.org
Subject: [PATCH v2 5/5] wcn36xx: Put DXE block into reset before freeing memory
Date: Tue, 19 Oct 2021 00:17:22 +0100 [thread overview]
Message-ID: <20211018231722.873525-6-bryan.odonoghue@linaro.org> (raw)
In-Reply-To: <20211018231722.873525-1-bryan.odonoghue@linaro.org>
When deiniting the DXE hardware we should reset the block to ensure there
is no spurious DMA write transaction from the downstream WCNSS to upstream
MSM at a skbuff address we will have released.
Fixes: 8e84c2582169 ("wcn36xx: mac80211 driver for Qualcomm WCN3660/WCN3680 hardware")
Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
---
drivers/net/wireless/ath/wcn36xx/dxe.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/net/wireless/ath/wcn36xx/dxe.c b/drivers/net/wireless/ath/wcn36xx/dxe.c
index d4f5746d9b10a..cf85b0cd11be4 100644
--- a/drivers/net/wireless/ath/wcn36xx/dxe.c
+++ b/drivers/net/wireless/ath/wcn36xx/dxe.c
@@ -1089,6 +1089,9 @@ void wcn36xx_dxe_deinit(struct wcn36xx *wcn)
wcn->tx_ack_skb = NULL;
}
+ /* Put the DXE block into reset before freeing memory */
+ wcn36xx_dxe_reset(wcn);
+
wcn36xx_dxe_ch_free_skbs(wcn, &wcn->dxe_rx_l_ch);
wcn36xx_dxe_ch_free_skbs(wcn, &wcn->dxe_rx_h_ch);
--
2.33.0
next prev parent reply other threads:[~2021-10-18 23:15 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-18 23:17 [PATCH v2 0/5] wcn36xx: Fix DMA buffer allocation and free logic Bryan O'Donoghue
2021-10-18 23:17 ` [PATCH v2 1/5] wcn36xx: Fix dxe lock layering violation Bryan O'Donoghue
2021-10-25 13:31 ` Kalle Valo
2021-10-18 23:17 ` [PATCH v2 2/5] wcn36xx: Fix DMA channel enable/disable cycle Bryan O'Donoghue
2021-10-18 23:17 ` [PATCH v2 3/5] wcn36xx: Release DMA channel descriptor allocations Bryan O'Donoghue
2021-10-18 23:17 ` [PATCH v2 4/5] wcn36xx: Functionally decompose DXE reset Bryan O'Donoghue
2021-10-18 23:17 ` Bryan O'Donoghue [this message]
2021-10-19 15:59 ` [PATCH v2 0/5] wcn36xx: Fix DMA buffer allocation and free logic Jeff Johnson
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