Thread (46 messages) flat view 46 messages, 5 authors, 2014-06-25
STALE4456d

[PATCH RFC 06/30] net: fec: remove checking for NULL phy_dev in fec_enet_close()

From: Russell King <hidden>
Date: 2014-06-20 12:12:13
Also in: netdev
Subsystem: freescale imx / mxc fec driver, networking drivers, the rest · Maintainers: Wei Fang, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds

fep->phy_dev can not be NULL here for two reasons:
- fec_enet_open() will have successfully connected the phy, or will have
  failed.
- fec_enet_open() will have called phy_start(fep->phy_dev), which
  unconditionally dereferences this pointer.

If it were to be NULL here, then fec_enet_open() will have already
oopsed.

Signed-off-by: Russell King <redacted>
---
 drivers/net/ethernet/freescale/fec_main.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)
diff --git a/drivers/net/ethernet/freescale/fec_main.c b/drivers/net/ethernet/freescale/fec_main.c
index cb9ced738607..6a03d7eced4d 100644
--- a/drivers/net/ethernet/freescale/fec_main.c
+++ b/drivers/net/ethernet/freescale/fec_main.c
@@ -2184,10 +2184,8 @@ fec_enet_close(struct net_device *ndev)
 	netif_tx_disable(ndev);
 	fec_stop(ndev);
 
-	if (fep->phy_dev) {
-		phy_stop(fep->phy_dev);
-		phy_disconnect(fep->phy_dev);
-	}
+	phy_stop(fep->phy_dev);
+	phy_disconnect(fep->phy_dev);
 
 	fec_enet_clk_enable(ndev, false);
 	pinctrl_pm_select_sleep_state(&fep->pdev->dev);
-- 
1.8.3.1
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