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Patch "net: bcmgenet: Utilize correct struct device for all DMA operations" has been added to the 4.4-stable tree

PATCH [email protected] 1 participant 1 message Dec 8, 2016

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Network drivers Stable branch Broadcom genet Ethernet driver
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This is a note to let you know that I've just added the patch titled

net: bcmgenet: Utilize correct struct device for all DMA operations

to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
net-bcmgenet-utilize-correct-struct-device-for-all-dma-operations.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

Quoted 1 line

From foo@baz Thu Dec 8 07:18:57 CET 2016

From: Florian Fainelli <[email protected]>
Date: Thu, 1 Dec 2016 09:45:45 -0800
Subject: net: bcmgenet: Utilize correct struct device for all DMA operations

From: Florian Fainelli <[email protected]>

[ Upstream commit 8c4799ac799665065f9bf1364fd71bf4f7dc6a4a ]

__bcmgenet_tx_reclaim() and bcmgenet_free_rx_buffers() are not using the same struct device during unmap that was used for the map operation, which makes DMA-API debugging warn about it. Fix this by always using &priv->pdev->dev throughout the driver, using an identical device reference for all map/unmap calls.

Fixes 1c1008c793fa ("net: bcmgenet: add main driver file")
Signed-off-by Florian Fainelli <[email protected]>
Signed-off-by David S. Miller <[email protected]>
Signed-off-by Greg Kroah-Hartman <[email protected]>
---
 drivers/net/ethernet/broadcom/genet/bcmgenet.c |    8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)
drivers/net/ethernet/broadcom/genet/bcmgenet.c +5 -3
@@ -1168,6 +1168,7 @@ static unsigned int __bcmgenet_tx_reclai
 					  struct bcmgenet_tx_ring *ring)
 {
 	struct bcmgenet_priv *priv = netdev_priv(dev);
+	struct device *kdev = &priv->pdev->dev;
 	struct enet_cb *tx_cb_ptr;
 	struct netdev_queue *txq;
 	unsigned int pkts_compl = 0;

@@ -1195,7 +1196,7 @@ static unsigned int __bcmgenet_tx_reclai
 			pkts_compl++;
 			dev->stats.tx_packets++;
 			dev->stats.tx_bytes += tx_cb_ptr->skb->len;
-			dma_unmap_single(&dev->dev,
+			dma_unmap_single(kdev,
 					 dma_unmap_addr(tx_cb_ptr, dma_addr),
 					 dma_unmap_len(tx_cb_ptr, dma_len),
 					 DMA_TO_DEVICE);

@@ -1203,7 +1204,7 @@ static unsigned int __bcmgenet_tx_reclai
 		} else if (dma_unmap_addr(tx_cb_ptr, dma_addr)) {
 			dev->stats.tx_bytes +=
 				dma_unmap_len(tx_cb_ptr, dma_len);
-			dma_unmap_page(&dev->dev,
+			dma_unmap_page(kdev,
 				       dma_unmap_addr(tx_cb_ptr, dma_addr),
 				       dma_unmap_len(tx_cb_ptr, dma_len),
 				       DMA_TO_DEVICE);

@@ -1754,6 +1755,7 @@ static int bcmgenet_alloc_rx_buffers(str
 
 static void bcmgenet_free_rx_buffers(struct bcmgenet_priv *priv)
 {
+	struct device *kdev = &priv->pdev->dev;
 	struct enet_cb *cb;
 	int i;
 

@@ -1761,7 +1763,7 @@ static void bcmgenet_free_rx_buffers(str
 		cb = &priv->rx_cbs[i];
 
 		if (dma_unmap_addr(cb, dma_addr)) {
-			dma_unmap_single(&priv->dev->dev,
+			dma_unmap_single(kdev,
 					 dma_unmap_addr(cb, dma_addr),
 					 priv->rx_buf_len, DMA_FROM_DEVICE);
 			dma_unmap_addr_set(cb, dma_addr, 0);

Patches currently in stable-queue which might be from [email protected] are

queue-4.4/net-dsa-bcm_sf2-ensure-we-re-negotiate-eee-during-after-link-change.patch queue-4.4/net-bcmgenet-utilize-correct-struct-device-for-all-dma-operations.patch