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Message-Id: <20180528100257.958569320@linuxfoundation.org>
Date: Mon, 28 May 2018 12:01:57 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, Hemanth Puranik <hpuranik@...eaurora.org>,
Timur Tabi <timur@...eaurora.org>,
"David S. Miller" <davem@...emloft.net>,
Sasha Levin <alexander.levin@...rosoft.com>
Subject: [PATCH 4.9 188/329] net: qcom/emac: Use proper free methods during TX
4.9-stable review patch. If anyone has any objections, please let me know.
------------------
From: Hemanth Puranik <hpuranik@...eaurora.org>
[ Upstream commit cc5db3150e87fe7f7e947bf333b6c1c97f848ecb ]
This patch fixes the warning messages/call traces seen if DMA debug is
enabled, In case of fragmented skb's memory was allocated using
dma_map_page but freed using dma_unmap_single. This patch modifies buffer
allocations in TX path to use dma_map_page in all the places and
dma_unmap_page while freeing the buffers.
Signed-off-by: Hemanth Puranik <hpuranik@...eaurora.org>
Acked-by: Timur Tabi <timur@...eaurora.org>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Sasha Levin <alexander.levin@...rosoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
drivers/net/ethernet/qualcomm/emac/emac-mac.c | 23 ++++++++++++++---------
1 file changed, 14 insertions(+), 9 deletions(-)
--- a/drivers/net/ethernet/qualcomm/emac/emac-mac.c
+++ b/drivers/net/ethernet/qualcomm/emac/emac-mac.c
@@ -1250,9 +1250,9 @@ void emac_mac_tx_process(struct emac_ada
while (tx_q->tpd.consume_idx != hw_consume_idx) {
tpbuf = GET_TPD_BUFFER(tx_q, tx_q->tpd.consume_idx);
if (tpbuf->dma_addr) {
- dma_unmap_single(adpt->netdev->dev.parent,
- tpbuf->dma_addr, tpbuf->length,
- DMA_TO_DEVICE);
+ dma_unmap_page(adpt->netdev->dev.parent,
+ tpbuf->dma_addr, tpbuf->length,
+ DMA_TO_DEVICE);
tpbuf->dma_addr = 0;
}
@@ -1409,9 +1409,11 @@ static void emac_tx_fill_tpd(struct emac
tpbuf = GET_TPD_BUFFER(tx_q, tx_q->tpd.produce_idx);
tpbuf->length = mapped_len;
- tpbuf->dma_addr = dma_map_single(adpt->netdev->dev.parent,
- skb->data, tpbuf->length,
- DMA_TO_DEVICE);
+ tpbuf->dma_addr = dma_map_page(adpt->netdev->dev.parent,
+ virt_to_page(skb->data),
+ offset_in_page(skb->data),
+ tpbuf->length,
+ DMA_TO_DEVICE);
ret = dma_mapping_error(adpt->netdev->dev.parent,
tpbuf->dma_addr);
if (ret)
@@ -1427,9 +1429,12 @@ static void emac_tx_fill_tpd(struct emac
if (mapped_len < len) {
tpbuf = GET_TPD_BUFFER(tx_q, tx_q->tpd.produce_idx);
tpbuf->length = len - mapped_len;
- tpbuf->dma_addr = dma_map_single(adpt->netdev->dev.parent,
- skb->data + mapped_len,
- tpbuf->length, DMA_TO_DEVICE);
+ tpbuf->dma_addr = dma_map_page(adpt->netdev->dev.parent,
+ virt_to_page(skb->data +
+ mapped_len),
+ offset_in_page(skb->data +
+ mapped_len),
+ tpbuf->length, DMA_TO_DEVICE);
ret = dma_mapping_error(adpt->netdev->dev.parent,
tpbuf->dma_addr);
if (ret)
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