drivers: net: xgene: Check for IS_ERR rather than NULL for clock.

This patches fixes the code to check for IS_ERR rather
than NULL for clock interface.

Signed-off-by: Iyappan Subramanian <isubramanian@apm.com>
Signed-off-by: Suman Tripathi <stripathi@apm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_hw.c b/drivers/net/ethernet/apm/xgene/xgene_enet_hw.c
index 8ff736d..a626c43 100644 (file)
--- a/drivers/net/ethernet/apm/xgene/xgene_enet_hw.c
+++ b/drivers/net/ethernet/apm/xgene/xgene_enet_hw.c
@@ -610,7 +610,7 @@ static int xgene_enet_reset(struct xgene_enet_pdata *pdata)
        if (!xgene_ring_mgr_init(pdata))
                return -ENODEV;
 
-       if (pdata->clk) {
+       if (!IS_ERR(pdata->clk)) {
                clk_prepare_enable(pdata->clk);
                clk_disable_unprepare(pdata->clk);
                clk_prepare_enable(pdata->clk);
@@ -629,7 +629,8 @@ static int xgene_enet_reset(struct xgene_enet_pdata *pdata)
 
 static void xgene_gport_shutdown(struct xgene_enet_pdata *pdata)
 {
-       clk_disable_unprepare(pdata->clk);
+       if (!IS_ERR(pdata->clk))
+               clk_disable_unprepare(pdata->clk);
 }
 
 static int xgene_enet_mdio_read(struct mii_bus *bus, int mii_id, int regnum)

diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_main.c b/drivers/net/ethernet/apm/xgene/xgene_enet_main.c
index 6c4e7ac..b334f27 100644 (file)
--- a/drivers/net/ethernet/apm/xgene/xgene_enet_main.c
+++ b/drivers/net/ethernet/apm/xgene/xgene_enet_main.c
@@ -1036,7 +1036,7 @@ static int xgene_enet_get_resources(struct xgene_enet_pdata *pdata)
        pdata->clk = devm_clk_get(&pdev->dev, NULL);
        if (IS_ERR(pdata->clk)) {
                /* Firmware may have set up the clock already. */
-               pdata->clk = NULL;
+               dev_info(dev, "clocks have been setup already\n");
        }
 
        if (pdata->phy_mode != PHY_INTERFACE_MODE_XGMII)

diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_sgmac.c b/drivers/net/ethernet/apm/xgene/xgene_enet_sgmac.c
index ff240b3..05b817e 100644 (file)
--- a/drivers/net/ethernet/apm/xgene/xgene_enet_sgmac.c
+++ b/drivers/net/ethernet/apm/xgene/xgene_enet_sgmac.c
@@ -334,9 +334,11 @@ static int xgene_enet_reset(struct xgene_enet_pdata *p)
        if (!xgene_ring_mgr_init(p))
                return -ENODEV;
 
-       clk_prepare_enable(p->clk);
-       clk_disable_unprepare(p->clk);
-       clk_prepare_enable(p->clk);
+       if (!IS_ERR(p->clk)) {
+               clk_prepare_enable(p->clk);
+               clk_disable_unprepare(p->clk);
+               clk_prepare_enable(p->clk);
+       }
 
        xgene_enet_ecc_init(p);
        xgene_enet_config_ring_if_assoc(p);
@@ -369,7 +371,8 @@ static void xgene_enet_cle_bypass(struct xgene_enet_pdata *p,
 
 static void xgene_enet_shutdown(struct xgene_enet_pdata *p)
 {
-       clk_disable_unprepare(p->clk);
+       if (!IS_ERR(p->clk))
+               clk_disable_unprepare(p->clk);
 }
 
 static void xgene_enet_link_state(struct work_struct *work)

diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_xgmac.c b/drivers/net/ethernet/apm/xgene/xgene_enet_xgmac.c
index 27ba2fe..05edb84 100644 (file)
--- a/drivers/net/ethernet/apm/xgene/xgene_enet_xgmac.c
+++ b/drivers/net/ethernet/apm/xgene/xgene_enet_xgmac.c
@@ -256,9 +256,11 @@ static int xgene_enet_reset(struct xgene_enet_pdata *pdata)
        if (!xgene_ring_mgr_init(pdata))
                return -ENODEV;
 
-       clk_prepare_enable(pdata->clk);
-       clk_disable_unprepare(pdata->clk);
-       clk_prepare_enable(pdata->clk);
+       if (!IS_ERR(pdata->clk)) {
+               clk_prepare_enable(pdata->clk);
+               clk_disable_unprepare(pdata->clk);
+               clk_prepare_enable(pdata->clk);
+       }
 
        xgene_enet_ecc_init(pdata);
        xgene_enet_config_ring_if_assoc(pdata);
@@ -285,7 +287,8 @@ static void xgene_enet_xgcle_bypass(struct xgene_enet_pdata *pdata,
 
 static void xgene_enet_shutdown(struct xgene_enet_pdata *pdata)
 {
-       clk_disable_unprepare(pdata->clk);
+       if (!IS_ERR(pdata->clk))
+               clk_disable_unprepare(pdata->clk);
 }
 
 static void xgene_enet_link_state(struct work_struct *work)