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net: mvneta: Fix the case where the last poll did not process all rx

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[ Upstream commit 065fd83e1be2e1ba0d446a257fd86a3cc7bddb51 ]

For the case where the last mvneta_poll did not process all
RX packets, we need to xor the pp->cause_rx_tx or port->cause_rx_tx
before claculating the rx_queue.

Fixes: 2dcf75e2793c ("net: mvneta: Associate RX queues with each CPU")
Signed-off-by: Jisheng Zhang <Jisheng.Zhang@synaptics.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jisheng Zhang 2020-03-16 22:56:36 +08:00 committed by Greg Kroah-Hartman
parent c5980c7153
commit 7645f4037d
1 changed files with 1 additions and 2 deletions
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3
drivers/net/ethernet/marvell/mvneta.c
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@ -2759,11 +2759,10 @@ static int mvneta_poll(struct napi_struct *napi, int budget)
/* For the case where the last mvneta_poll did not process all
* RX packets
*/
rx_queue = fls(((cause_rx_tx >> 8) & 0xff));
cause_rx_tx |= pp->neta_armada3700 ? pp->cause_rx_tx :
port->cause_rx_tx;
rx_queue = fls(((cause_rx_tx >> 8) & 0xff));
if (rx_queue) {
rx_queue = rx_queue - 1;
if (pp->bm_priv)