From: Markus Elfring <elfring@xxxxxxxxxxxxxxxxxxxxx>
Date: Mon, 16 Nov 2015 21:56:07 +0100
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@xxxxxxxxxxxxxxxxxxxxx>
---
drivers/dma/ste_dma40.c | 82 ++++++++++++++++++++++++-------------------------
1 file changed, 40 insertions(+), 42 deletions(-)
diff --git a/drivers/dma/ste_dma40.c b/drivers/dma/ste_dma40.c
index 9132ae0..8ebfde1 100644
--- 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;
}
--
2.6.2
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