Commit 5ffc0335 authored by Lendacky, Thomas's avatar Lendacky, Thomas Committed by David S. Miller

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: default avatarTom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent f0a40400
...@@ -1897,7 +1897,7 @@ static int xgbe_disable_int(struct xgbe_channel *channel, ...@@ -1897,7 +1897,7 @@ static int xgbe_disable_int(struct xgbe_channel *channel,
return 0; return 0;
} }
static int xgbe_exit(struct xgbe_prv_data *pdata) static int __xgbe_exit(struct xgbe_prv_data *pdata)
{ {
unsigned int count = 2000; unsigned int count = 2000;
...@@ -1919,6 +1919,20 @@ static int xgbe_exit(struct xgbe_prv_data *pdata) ...@@ -1919,6 +1919,20 @@ static int xgbe_exit(struct xgbe_prv_data *pdata)
return 0; 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) static int xgbe_flush_tx_queues(struct xgbe_prv_data *pdata)
{ {
unsigned int i, count; unsigned int i, count;
......
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