This is a note to let you know that I've just added the patch titled
ll_temac: Reset dma descriptors indexes on ndo_open
to the 3.4-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:
ll_temac-reset-dma-descriptors-indexes-on-ndo_open.patch
and it can be found in the queue-3.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From c4d98fbe3313c9edd4b4ffe851a5e49b47cece00 Mon Sep 17 00:00:00 2001
From: Ricardo Ribalda <ricardo.ribalda@xxxxxxxxx>
Date: Tue, 1 Oct 2013 08:17:10 +0200
Subject: ll_temac: Reset dma descriptors indexes on ndo_open
From: Ricardo Ribalda <ricardo.ribalda@xxxxxxxxx>
[ Upstream commit 7167cf0e8cd10287b7912b9ffcccd9616f382922 ]
The dma descriptors indexes are only initialized on the probe function.
If a packet is on the buffer when temac_stop is called, the dma
descriptors indexes can be left on a incorrect state where no other
package can be sent.
So an interface could be left in an usable state after ifdow/ifup.
This patch makes sure that the descriptors indexes are in a proper
status when the device is open.
Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@xxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/ethernet/xilinx/ll_temac_main.c | 6 ++++++
1 file changed, 6 insertions(+)
--- a/drivers/net/ethernet/xilinx/ll_temac_main.c
+++ b/drivers/net/ethernet/xilinx/ll_temac_main.c
@@ -308,6 +308,12 @@ static int temac_dma_bd_init(struct net_
lp->rx_bd_p + (sizeof(*lp->rx_bd_v) * (RX_BD_NUM - 1)));
lp->dma_out(lp, TX_CURDESC_PTR, lp->tx_bd_p);
+ /* Init descriptor indexes */
+ lp->tx_bd_ci = 0;
+ lp->tx_bd_next = 0;
+ lp->tx_bd_tail = 0;
+ lp->rx_bd_ci = 0;
+
return 0;
out:
Patches currently in stable-queue which might be from ricardo.ribalda@xxxxxxxxx are
queue-3.4/ll_temac-reset-dma-descriptors-indexes-on-ndo_open.patch
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