ste_dma40: Delete another unnecessary check in d40_probe()

A single jump label was used by the d40_probe() function in several cases
for error handling which was a bit inefficient here.

* This implementation detail could be improved by the introduction
  of another jump label.

* Remove an extra check for the variable "base".

* Omit its explicit initialisation at the beginning then.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

diff --git a/drivers/dma/ste_dma40.c b/drivers/dma/ste_dma40.c
index 9132ae0..8ebfde1 100644 (file)
--- a/drivers/dma/ste_dma40.c
+++ b/drivers/dma/ste_dma40.c
@@ -3543,7 +3543,7 @@ static int __init d40_probe(struct platform_device *pdev)
        struct stedma40_platform_data *plat_data = dev_get_platdata(&pdev->dev);
        struct device_node *np = pdev->dev.of_node;
        int ret = -ENOENT;
-       struct d40_base *base = NULL;
+       struct d40_base *base;
        struct resource *res = NULL;
        int num_reserved_chans;
        u32 val;
@@ -3552,17 +3552,17 @@ static int __init d40_probe(struct platform_device *pdev)
                if (np) {
                        if (d40_of_probe(pdev, np)) {
                                ret = -ENOMEM;
-                               goto failure;
+                               goto report_failure;
                        }
                } else {
                        d40_err(&pdev->dev, "No pdata or Device Tree provided\n");
-                       goto failure;
+                       goto report_failure;
                }
        }
 
        base = d40_hw_detect_init(pdev);
        if (!base)
-               goto failure;
+               goto report_failure;
 
        num_reserved_chans = d40_phy_res_init(base);
 
@@ -3693,50 +3693,48 @@ static int __init d40_probe(struct platform_device *pdev)
        return 0;
 
 failure:
-       if (base) {
-               kmem_cache_destroy(base->desc_slab);
-               if (base->virtbase)
-                       iounmap(base->virtbase);
+       kmem_cache_destroy(base->desc_slab);
+       if (base->virtbase)
+               iounmap(base->virtbase);
 
-               if (base->lcla_pool.base && base->plat_data->use_esram_lcla) {
-                       iounmap(base->lcla_pool.base);
-                       base->lcla_pool.base = NULL;
-               }
+       if (base->lcla_pool.base && base->plat_data->use_esram_lcla) {
+               iounmap(base->lcla_pool.base);
+               base->lcla_pool.base = NULL;
+       }
 
-               if (base->lcla_pool.dma_addr)
-                       dma_unmap_single(base->dev, base->lcla_pool.dma_addr,
-                                        SZ_1K * base->num_phy_chans,
-                                        DMA_TO_DEVICE);
-
-               if (!base->lcla_pool.base_unaligned && base->lcla_pool.base)
-                       free_pages((unsigned long)base->lcla_pool.base,
-                                  base->lcla_pool.pages);
-
-               kfree(base->lcla_pool.base_unaligned);
-
-               if (base->phy_lcpa)
-                       release_mem_region(base->phy_lcpa,
-                                          base->lcpa_size);
-               if (base->phy_start)
-                       release_mem_region(base->phy_start,
-                                          base->phy_size);
-               if (base->clk) {
-                       clk_disable_unprepare(base->clk);
-                       clk_put(base->clk);
-               }
+       if (base->lcla_pool.dma_addr)
+               dma_unmap_single(base->dev, base->lcla_pool.dma_addr,
+                                SZ_1K * base->num_phy_chans,
+                                DMA_TO_DEVICE);
 
-               if (base->lcpa_regulator) {
-                       regulator_disable(base->lcpa_regulator);
-                       regulator_put(base->lcpa_regulator);
-               }
+       if (!base->lcla_pool.base_unaligned && base->lcla_pool.base)
+               free_pages((unsigned long)base->lcla_pool.base,
+                          base->lcla_pool.pages);
 
-               kfree(base->lcla_pool.alloc_map);
-               kfree(base->lookup_log_chans);
-               kfree(base->lookup_phy_chans);
-               kfree(base->phy_res);
-               kfree(base);
+       kfree(base->lcla_pool.base_unaligned);
+
+       if (base->phy_lcpa)
+               release_mem_region(base->phy_lcpa,
+                                  base->lcpa_size);
+       if (base->phy_start)
+               release_mem_region(base->phy_start,
+                                  base->phy_size);
+       if (base->clk) {
+               clk_disable_unprepare(base->clk);
+               clk_put(base->clk);
+       }
+
+       if (base->lcpa_regulator) {
+               regulator_disable(base->lcpa_regulator);
+               regulator_put(base->lcpa_regulator);
        }
 
+       kfree(base->lcla_pool.alloc_map);
+       kfree(base->lookup_log_chans);
+       kfree(base->lookup_phy_chans);
+       kfree(base->phy_res);
+       kfree(base);
+report_failure:
        d40_err(&pdev->dev, "probe failed\n");
        return ret;
 }