Patch "net: systemport: Free DMA coherent descriptors on errors" has been added to the 4.12-stable tree

This is a note to let you know that I've just added the patch titled

net: systemport: Free DMA coherent descriptors on errors

to the 4.12-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-systemport-free-dma-coherent-descriptors-on-errors.patch
and it can be found in the queue-4.12 subdirectory.

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

From: Florian Fainelli <[email protected]>
Date: Thu, 24 Aug 2017 16:01:13 -0700
Subject: net: systemport: Free DMA coherent descriptors on errors

From: Florian Fainelli <[email protected]>

[ Upstream commit c2062ee3d9615828109ffe8089fbf69bed394d05 ]

In case bcm_sysport_init_tx_ring() is not able to allocate ring->cbs, we would return with an error, and call bcm_sysport_fini_tx_ring() and it would see that ring->cbs is NULL and do nothing. This would leak the coherent DMA descriptor area, so we need to free it on error before returning.

---
 drivers/net/ethernet/broadcom/bcmsysport.c |    2 ++
 1 file changed, 2 insertions(+)

@@ -1342,6 +1342,8 @@ static int bcm_sysport_init_tx_ring(stru
 
 	ring->cbs = kcalloc(size, sizeof(struct bcm_sysport_cb), GFP_KERNEL);
 	if (!ring->cbs) {
+		dma_free_coherent(kdev, sizeof(struct dma_desc),
+				  ring->desc_cpu, ring->desc_dma);
 		netif_err(priv, hw, priv->netdev, "CB allocation failed\n");
 		return -ENOMEM;
 	}

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

queue-4.12/net-systemport-be-drop-monitor-friendly.patch queue-4.12/net-bcmgenet-be-drop-monitor-friendly.patch queue-4.12/net-dsa-bcm_sf2-fix-number-of-cfp-entries-for-bcm7278.patch queue-4.12/net-systemport-free-dma-coherent-descriptors-on-errors.patch queue-4.12/fsl-man-inherit-parent-device-and-of_node.patch queue-4.12/revert-net-phy-correctly-process-phy_halted-in-phy_stop_machine.patch