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net/macb: better manage tx errors

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Handle all TX errors, not only underruns. TX error management is
deferred to a dedicated workqueue.
Reinitialize the TX ring after treating all remaining frames, and
restart the controller when everything has been cleaned up properly.
Napi is not stopped during this task as the driver only handles
napi for RX for now.
With this sequence, we do not need a special check during the xmit
method as the packets will be caught by TX disable during workqueue
execution.

Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Tested-by: Joachim Eastwood <manabian@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Nicolas Ferre
2012-10-31 06:04:57 +00:00
committed by David S. Miller
parent d1d1b53d9d
commit e86cd53afc
2 changed files with 121 additions and 62 deletions
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1
drivers/net/ethernet/cadence/macb.h
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@@ -538,6 +538,7 @@ struct macb {
struct clk *hclk;
struct net_device *dev;
struct napi_struct napi;
struct work_struct tx_error_task;
struct net_device_stats stats;
union {
struct macb_stats macb;