net/stmmac: remove conditional compilation of clk code

With addition of dummy clk_*() calls for non CONFIG_HAVE_CLK cases in
clk.h, there is no need to have clk code enclosed in #ifdef
CONFIG_HAVE_CLK, #endif macros.

This also fixes error paths of probe(), as a goto is required in this
patch.

Signed-off-by: Viresh Kumar <viresh.kumar@st.com>
Cc: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Acked-by: David S. Miller <davem@davemloft.net>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: Mike Turquette <mturquette@linaro.org>
Cc: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Cc: viresh kumar <viresh.linux@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2 files changed, 17 insertions, 58 deletions

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac.h b/drivers/net/ethernet/stmicro/stmmac/stmmac.h
index ab4c376cb276..f2d3665430ad 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac.h
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac.h
@@ -82,9 +82,7 @@ struct stmmac_priv {
         struct stmmac_counters mmc;
         struct dma_features dma_cap;
         int hw_cap_support;
-#ifdef CONFIG_HAVE_CLK
         struct clk *stmmac_clk;
-#endif
         int clk_csr;
         int synopsys_id;
         struct timer_list eee_ctrl_timer;
@@ -113,46 +111,6 @@ struct stmmac_priv *stmmac_dvr_probe(struct device *device,
 void stmmac_disable_eee_mode(struct stmmac_priv *priv);
 bool stmmac_eee_init(struct stmmac_priv *priv);
 
-#ifdef CONFIG_HAVE_CLK
-static inline int stmmac_clk_enable(struct stmmac_priv *priv)
-{
-        if (!IS_ERR(priv->stmmac_clk))
-                return clk_prepare_enable(priv->stmmac_clk);
-
-        return 0;
-}
-
-static inline void stmmac_clk_disable(struct stmmac_priv *priv)
-{
-        if (IS_ERR(priv->stmmac_clk))
-                return;
-
-        clk_disable_unprepare(priv->stmmac_clk);
-}
-static inline int stmmac_clk_get(struct stmmac_priv *priv)
-{
-        priv->stmmac_clk = clk_get(priv->device, NULL);
-
-        if (IS_ERR(priv->stmmac_clk))
-                return PTR_ERR(priv->stmmac_clk);
-
-        return 0;
-}
-#else
-static inline int stmmac_clk_enable(struct stmmac_priv *priv)
-{
-        return 0;
-}
-static inline void stmmac_clk_disable(struct stmmac_priv *priv)
-{
-}
-static inline int stmmac_clk_get(struct stmmac_priv *priv)
-{
-        return 0;
-}
-#endif /* CONFIG_HAVE_CLK */
-
-
 #ifdef CONFIG_STMMAC_PLATFORM
 extern struct platform_driver stmmac_pltfr_driver;
 static inline int stmmac_register_platform(void)
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index f6b04c1a3672..fd8882f9602a 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -28,6 +28,7 @@
         https://bugzilla.stlinux.com/
 *******************************************************************************/
 
+#include <linux/clk.h>
 #include <linux/kernel.h>
 #include <linux/interrupt.h>
 #include <linux/ip.h>
@@ -173,12 +174,8 @@ static void stmmac_verify_args(void)
 
 static void stmmac_clk_csr_set(struct stmmac_priv *priv)
 {
-#ifdef CONFIG_HAVE_CLK
         u32 clk_rate;
 
-        if (IS_ERR(priv->stmmac_clk))
-                return;
-
         clk_rate = clk_get_rate(priv->stmmac_clk);
 
         /* Platform provided default clk_csr would be assumed valid
@@ -200,7 +197,6 @@ static void stmmac_clk_csr_set(struct stmmac_priv *priv)
            * we can not estimate the proper divider as it is not known
            * the frequency of clk_csr_i. So we do not change the default
            * divider. */
-#endif
 }
 
 #if defined(STMMAC_XMIT_DEBUG) || defined(STMMAC_RX_DEBUG)
@@ -1070,7 +1066,7 @@ static int stmmac_open(struct net_device *dev)
         } else
                 priv->tm->enable = 1;
 #endif
-        stmmac_clk_enable(priv);
+        clk_enable(priv->stmmac_clk);
 
         stmmac_check_ether_addr(priv);
 
@@ -1192,7 +1188,7 @@ open_error:
         if (priv->phydev)
                 phy_disconnect(priv->phydev);
 
-        stmmac_clk_disable(priv);
+        clk_disable(priv->stmmac_clk);
 
         return ret;
 }
@@ -1250,7 +1246,7 @@ static int stmmac_release(struct net_device *dev)
 #ifdef CONFIG_STMMAC_DEBUG_FS
         stmmac_exit_fs();
 #endif
-        stmmac_clk_disable(priv);
+        clk_disable(priv->stmmac_clk);
 
         return 0;
 }
@@ -2078,11 +2074,14 @@ struct stmmac_priv *stmmac_dvr_probe(struct device *device,
         ret = register_netdev(ndev);
         if (ret) {
                 pr_err("%s: ERROR %i registering the device\n", __func__, ret);
-                goto error;
+                goto error_netdev_register;
         }
 
-        if (stmmac_clk_get(priv))
+        priv->stmmac_clk = clk_get(priv->device, NULL);
+        if (IS_ERR(priv->stmmac_clk)) {
                 pr_warning("%s: warning: cannot get CSR clock\n", __func__);
+                goto error_clk_get;
+        }
 
         /* If a specific clk_csr value is passed from the platform
          * this means that the CSR Clock Range selection cannot be
@@ -2100,15 +2099,17 @@ struct stmmac_priv *stmmac_dvr_probe(struct device *device,
         if (ret < 0) {
                 pr_debug("%s: MDIO bus (id: %d) registration failed",
                          __func__, priv->plat->bus_id);
-                goto error;
+                goto error_mdio_register;
         }
 
         return priv;
 
-error:
-        netif_napi_del(&priv->napi);
-
+error_mdio_register:
+        clk_put(priv->stmmac_clk);
+error_clk_get:
         unregister_netdev(ndev);
+error_netdev_register:
+        netif_napi_del(&priv->napi);
         free_netdev(ndev);
 
         return NULL;
@@ -2177,7 +2178,7 @@ int stmmac_suspend(struct net_device *ndev)
         else {
                 stmmac_set_mac(priv->ioaddr, false);
                 /* Disable clock in case of PWM is off */
-                stmmac_clk_disable(priv);
+                clk_disable(priv->stmmac_clk);
         }
         spin_unlock_irqrestore(&priv->lock, flags);
         return 0;
@@ -2202,7 +2203,7 @@ int stmmac_resume(struct net_device *ndev)
                 priv->hw->mac->pmt(priv->ioaddr, 0);
         else
                 /* enable the clk prevously disabled */
-                stmmac_clk_enable(priv);
+                clk_enable(priv->stmmac_clk);
 
         netif_device_attach(ndev);