From e99e2f59d9a26c2e6872cdde7312742fe113f80c Mon Sep 17 00:00:00 2001 From: Alexandre Belloni Date: Wed, 12 Feb 2020 17:45:38 +0100 Subject: net: macb: ensure interface is not suspended on at91rm9200 [ Upstream commit e6a41c23df0d5da01540d2abef41591589c0b4be ] Because of autosuspend, at91ether_start is called with clocks disabled. Ensure that pm_runtime doesn't suspend the interface as soon as it is opened as there is no pm_runtime support is the other relevant parts of the platform support for at91rm9200. Fixes: d54f89af6cc4 ("net: macb: Add pm runtime support") Signed-off-by: Alexandre Belloni Reviewed-by: Claudiu Beznea Acked-by: Nicolas Ferre Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- drivers/net/ethernet/cadence/macb_main.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/cadence/macb_main.c b/drivers/net/ethernet/cadence/macb_main.c index 95a94507cec1..234c13ebbc41 100644 --- a/drivers/net/ethernet/cadence/macb_main.c +++ b/drivers/net/ethernet/cadence/macb_main.c @@ -3690,6 +3690,10 @@ static int at91ether_open(struct net_device *dev) u32 ctl; int ret; + ret = pm_runtime_get_sync(&lp->pdev->dev); + if (ret < 0) + return ret; + /* Clear internal statistics */ ctl = macb_readl(lp, NCR); macb_writel(lp, NCR, ctl | MACB_BIT(CLRSTAT)); @@ -3750,7 +3754,7 @@ static int at91ether_close(struct net_device *dev) q->rx_buffers, q->rx_buffers_dma); q->rx_buffers = NULL; - return 0; + return pm_runtime_put(&lp->pdev->dev); } /* Transmit packet */ -- cgit v1.2.3