sata_mv: Remove unneeded CONFIG_HAVE_CLK ifdefs

If CONFIG_HAVE_CLK is not selected, then all the clk API turn out
into no-ops. In other words, there's no need to have the ifdefs.

The only side-effect of this patch is the extra tiny kmalloc,
but that's not enough reason to have such ugly ifdefs all around
the code.

tj: Slightly massaged comment as per Andrew Lunn.

Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Acked-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Tejun Heo <tj@kernel.org>

1 files changed, 7 insertions, 14 deletions

diff --git a/drivers/ata/sata_mv.c b/drivers/ata/sata_mv.c
index 88e08515cf46..56be31819897 100644
--- a/drivers/ata/sata_mv.c
+++ b/drivers/ata/sata_mv.c
@@ -553,10 +553,15 @@ struct mv_host_priv {
         u32                     irq_mask_offset;
         u32                     unmask_all_irqs;
 
-#if defined(CONFIG_HAVE_CLK)
+        /*
+         * Needed on some devices that require their clocks to be enabled.
+         * These are optional: if the platform device does not have any
+         * clocks, they won't be used.  Also, if the underlying hardware
+         * does not support the common clock framework (CONFIG_HAVE_CLK=n),
+         * all the clock operations become no-ops (see clk.h).
+         */
         struct clk              *clk;
         struct clk              **port_clks;
-#endif
         /*
          * These consistent DMA memory pools give us guaranteed
          * alignment for hardware-accessed data structures,
@@ -4032,9 +4037,7 @@ static int mv_platform_probe(struct platform_device *pdev)
         struct resource *res;
         int n_ports = 0, irq = 0;
         int rc;
-#if defined(CONFIG_HAVE_CLK)
         int port;
-#endif
 
         ata_print_version_once(&pdev->dev, DRV_VERSION);
 
@@ -4068,13 +4071,11 @@ static int mv_platform_probe(struct platform_device *pdev)
 
         if (!host || !hpriv)
                 return -ENOMEM;
-#if defined(CONFIG_HAVE_CLK)
         hpriv->port_clks = devm_kzalloc(&pdev->dev,
                                         sizeof(struct clk *) * n_ports,
                                         GFP_KERNEL);
         if (!hpriv->port_clks)
                 return -ENOMEM;
-#endif
         host->private_data = hpriv;
         hpriv->n_ports = n_ports;
         hpriv->board_idx = chip_soc;
@@ -4084,7 +4085,6 @@ static int mv_platform_probe(struct platform_device *pdev)
                                    resource_size(res));
         hpriv->base -= SATAHC0_REG_BASE;
 
-#if defined(CONFIG_HAVE_CLK)
         hpriv->clk = clk_get(&pdev->dev, NULL);
         if (IS_ERR(hpriv->clk))
                 dev_notice(&pdev->dev, "cannot get optional clkdev\n");
@@ -4098,7 +4098,6 @@ static int mv_platform_probe(struct platform_device *pdev)
                 if (!IS_ERR(hpriv->port_clks[port]))
                         clk_prepare_enable(hpriv->port_clks[port]);
         }
-#endif
 
         /*
          * (Re-)program MBUS remapping windows if we are asked to.
@@ -4124,7 +4123,6 @@ static int mv_platform_probe(struct platform_device *pdev)
                 return 0;
 
 err:
-#if defined(CONFIG_HAVE_CLK)
         if (!IS_ERR(hpriv->clk)) {
                 clk_disable_unprepare(hpriv->clk);
                 clk_put(hpriv->clk);
@@ -4135,7 +4133,6 @@ err:
                         clk_put(hpriv->port_clks[port]);
                 }
         }
-#endif
 
         return rc;
 }
@@ -4151,13 +4148,10 @@ err:
 static int mv_platform_remove(struct platform_device *pdev)
 {
         struct ata_host *host = platform_get_drvdata(pdev);
-#if defined(CONFIG_HAVE_CLK)
         struct mv_host_priv *hpriv = host->private_data;
         int port;
-#endif
         ata_host_detach(host);
 
-#if defined(CONFIG_HAVE_CLK)
         if (!IS_ERR(hpriv->clk)) {
                 clk_disable_unprepare(hpriv->clk);
                 clk_put(hpriv->clk);
@@ -4168,7 +4162,6 @@ static int mv_platform_remove(struct platform_device *pdev)
                         clk_put(hpriv->port_clks[port]);
                 }
         }
-#endif
         return 0;
 }