From: Hao Chen <chenhaoa@uniontech.com>
To: peppe.cavallaro@st.com
Cc: alexandre.torgue@foss.st.com, joabreu@synopsys.com,
davem@davemloft.net, kuba@kernel.org, mcoquelin.stm32@gmail.com,
linux@armlinux.org.uk, netdev@vger.kernel.org,
linux-stm32@st-md-mailman.stormreply.com,
linux-kernel@vger.kernel.org, Hao Chen <chenhaoa@uniontech.com>
Subject: [PATCH v3] net: stmmac: fix 'ethtool -P' return -EBUSY
Date: Mon, 19 Jul 2021 16:53:06 +0800 [thread overview]
Message-ID: <20210719085306.30820-1-chenhaoa@uniontech.com> (raw)
The permanent mac address should be available for query when the device
is not up.
NetworkManager, the system network daemon, uses 'ethtool -P' to obtain
the permanent address after the kernel start. When the network device
is not up, it will return the device busy error with 'ethtool -P'. At
that time, it is unable to access the Internet through the permanent
address by NetworkManager.
I think that the '.begin' is not used to check if the device is up.
Signed-off-by: Hao Chen <chenhaoa@uniontech.com>
---
drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c
index d0ce608b81c3..8fbb58c95507 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c
@@ -15,6 +15,7 @@
#include <linux/phylink.h>
#include <linux/net_tstamp.h>
#include <asm/io.h>
+#include <linux/pm_runtime.h>
#include "stmmac.h"
#include "dwmac_dma.h"
@@ -412,8 +413,10 @@ static void stmmac_ethtool_setmsglevel(struct net_device *dev, u32 level)
static int stmmac_check_if_running(struct net_device *dev)
{
- if (!netif_running(dev))
- return -EBUSY;
+ struct stmmac_priv *priv = netdev_priv(dev);
+
+ pm_runtime_get_sync(priv->device);
+
return 0;
}
--
2.20.1
next reply other threads:[~2021-07-19 9:00 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-19 8:53 Hao Chen [this message]
-- strict thread matches above, loose matches on Subject: below --
2021-07-19 8:40 [PATCH v3] net: stmmac: fix 'ethtool -P' return -EBUSY Hao Chen
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