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amd-xgbe: Guard against incorrectly generated interrupts 

Due to a hardware issue, it is possible for interrupt events to be
incorrectly generated when performing a soft reset.  To guard against
this, perform the soft reset twice.

Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
hifive-unleashed-5.1
Lendacky, Thomas 2016-11-10 17:09:29 -06:00 committed by David S. Miller
parent f0a4040012
commit 5ffc0335d5
1 changed files with 15 additions and 1 deletions
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16
drivers/net/ethernet/amd/xgbe/xgbe-dev.c
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@ -1897,7 +1897,7 @@ static int xgbe_disable_int(struct xgbe_channel *channel,
return 0;
}
static int xgbe_exit(struct xgbe_prv_data *pdata)
static int __xgbe_exit(struct xgbe_prv_data *pdata)
{
unsigned int count = 2000;
@ -1919,6 +1919,20 @@ static int xgbe_exit(struct xgbe_prv_data *pdata)
return 0;
}
static int xgbe_exit(struct xgbe_prv_data *pdata)
{
int ret;
/* To guard against possible incorrectly generated interrupts,
* issue the software reset twice.
*/
ret = __xgbe_exit(pdata);
if (ret)
return ret;
return __xgbe_exit(pdata);
}
static int xgbe_flush_tx_queues(struct xgbe_prv_data *pdata)
{
unsigned int i, count;