blob: f857a03d861422966834681c58d35f8ef1bb7e64 [file] [log] [blame]
From 35ec8830ae2f12fff229cc88efcc23d439216685 Mon Sep 17 00:00:00 2001
From: Andrew Lunn <andrew@lunn.ch>
Date: Thu, 2 Jan 2020 15:33:34 +0100
Subject: [PATCH] net: freescale: fec: Fix ethtool -d runtime PM
commit c72a0bc0aa19f49160330a65ab77184b5b7d131b upstream.
In order to dump the FECs registers the clocks have to be ticking,
otherwise a data abort occurs. Add calls to runtime PM so they are
enabled and later disabled.
Fixes: e8fcfcd5684a ("net: fec: optimize the clock management to save power")
Reported-by: Chris Healy <Chris.Healy@zii.aero>
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
diff --git a/drivers/net/ethernet/freescale/fec_main.c b/drivers/net/ethernet/freescale/fec_main.c
index 95731bcd066d..268eb6edab39 100644
--- a/drivers/net/ethernet/freescale/fec_main.c
+++ b/drivers/net/ethernet/freescale/fec_main.c
@@ -2141,8 +2141,14 @@ static void fec_enet_get_regs(struct net_device *ndev,
{
struct fec_enet_private *fep = netdev_priv(ndev);
u32 __iomem *theregs = (u32 __iomem *)fep->hwp;
+ struct device *dev = &fep->pdev->dev;
u32 *buf = (u32 *)regbuf;
u32 i, off;
+ int ret;
+
+ ret = pm_runtime_get_sync(dev);
+ if (ret < 0)
+ return;
regs->version = fec_enet_register_version;
@@ -2158,6 +2164,9 @@ static void fec_enet_get_regs(struct net_device *ndev,
off >>= 2;
buf[off] = readl(&theregs[off]);
}
+
+ pm_runtime_mark_last_busy(dev);
+ pm_runtime_put_autosuspend(dev);
}
static int fec_enet_get_ts_info(struct net_device *ndev,
--
2.7.4