e1000e: fix accessing to suspended device
This patch fixes some annoying messages like 'Error reading PHY register' and
'Hardware Erorr' and saves several seconds on reboot.
Cc: Bruce Allan <bruce.w.allan@intel.com>
Signed-off-by: Konstantin Khlebnikov <khlebnikov@openvz.org>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Tested-by: Borislav Petkov <bp@suse.de>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
diff --git a/drivers/net/ethernet/intel/e1000e/ethtool.c b/drivers/net/ethernet/intel/e1000e/ethtool.c
index 2c18137..f91a8f3 100644
--- a/drivers/net/ethernet/intel/e1000e/ethtool.c
+++ b/drivers/net/ethernet/intel/e1000e/ethtool.c
@@ -36,6 +36,7 @@
#include <linux/delay.h>
#include <linux/vmalloc.h>
#include <linux/mdio.h>
+#include <linux/pm_runtime.h>
#include "e1000.h"
@@ -2229,7 +2230,19 @@
return 0;
}
+static int e1000e_ethtool_begin(struct net_device *netdev)
+{
+ return pm_runtime_get_sync(netdev->dev.parent);
+}
+
+static void e1000e_ethtool_complete(struct net_device *netdev)
+{
+ pm_runtime_put_sync(netdev->dev.parent);
+}
+
static const struct ethtool_ops e1000_ethtool_ops = {
+ .begin = e1000e_ethtool_begin,
+ .complete = e1000e_ethtool_complete,
.get_settings = e1000_get_settings,
.set_settings = e1000_set_settings,
.get_drvinfo = e1000_get_drvinfo,
diff --git a/drivers/net/ethernet/intel/e1000e/netdev.c b/drivers/net/ethernet/intel/e1000e/netdev.c
index 2954cc7..948b86ff 100644
--- a/drivers/net/ethernet/intel/e1000e/netdev.c
+++ b/drivers/net/ethernet/intel/e1000e/netdev.c
@@ -4663,6 +4663,7 @@
(adapter->hw.phy.media_type == e1000_media_type_copper)) {
int ret_val;
+ pm_runtime_get_sync(&adapter->pdev->dev);
ret_val = e1e_rphy(hw, MII_BMCR, &phy->bmcr);
ret_val |= e1e_rphy(hw, MII_BMSR, &phy->bmsr);
ret_val |= e1e_rphy(hw, MII_ADVERTISE, &phy->advertise);
@@ -4673,6 +4674,7 @@
ret_val |= e1e_rphy(hw, MII_ESTATUS, &phy->estatus);
if (ret_val)
e_warn("Error reading PHY register\n");
+ pm_runtime_put_sync(&adapter->pdev->dev);
} else {
/* Do not read PHY registers if link is not up
* Set values to typical power-on defaults