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

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

drivers/net/ethernet/amd/xgbe/xgbe-dev.c

+15 −1
Original line number Diff line number Diff line
@@ -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;