diff options
Diffstat (limited to 'drivers/base/dma-coherent.c')
| -rw-r--r-- | drivers/base/dma-coherent.c | 28 |
1 files changed, 11 insertions, 17 deletions
diff --git a/drivers/base/dma-coherent.c b/drivers/base/dma-coherent.c index 55b83983a9c0..87b808374888 100644 --- a/drivers/base/dma-coherent.c +++ b/drivers/base/dma-coherent.c @@ -17,9 +17,9 @@ struct dma_coherent_mem { spinlock_t spinlock; }; -static int dma_init_coherent_memory(phys_addr_t phys_addr, dma_addr_t device_addr, - size_t size, int flags, - struct dma_coherent_mem **mem) +static bool dma_init_coherent_memory( + phys_addr_t phys_addr, dma_addr_t device_addr, size_t size, int flags, + struct dma_coherent_mem **mem) { struct dma_coherent_mem *dma_mem = NULL; void __iomem *mem_base = NULL; @@ -50,17 +50,13 @@ static int dma_init_coherent_memory(phys_addr_t phys_addr, dma_addr_t device_add spin_lock_init(&dma_mem->spinlock); *mem = dma_mem; - - if (flags & DMA_MEMORY_MAP) - return DMA_MEMORY_MAP; - - return DMA_MEMORY_IO; + return true; out: kfree(dma_mem); if (mem_base) iounmap(mem_base); - return 0; + return false; } static void dma_release_coherent_memory(struct dma_coherent_mem *mem) @@ -88,15 +84,13 @@ int dma_declare_coherent_memory(struct device *dev, phys_addr_t phys_addr, dma_addr_t device_addr, size_t size, int flags) { struct dma_coherent_mem *mem; - int ret; - ret = dma_init_coherent_memory(phys_addr, device_addr, size, flags, - &mem); - if (ret == 0) + if (!dma_init_coherent_memory(phys_addr, device_addr, size, flags, + &mem)) return 0; if (dma_assign_coherent_memory(dev, mem) == 0) - return ret; + return flags & DMA_MEMORY_MAP ? DMA_MEMORY_MAP : DMA_MEMORY_IO; dma_release_coherent_memory(mem); return 0; @@ -281,9 +275,9 @@ static int rmem_dma_device_init(struct reserved_mem *rmem, struct device *dev) struct dma_coherent_mem *mem = rmem->priv; if (!mem && - dma_init_coherent_memory(rmem->base, rmem->base, rmem->size, - DMA_MEMORY_MAP | DMA_MEMORY_EXCLUSIVE, - &mem) != DMA_MEMORY_MAP) { + !dma_init_coherent_memory(rmem->base, rmem->base, rmem->size, + DMA_MEMORY_MAP | DMA_MEMORY_EXCLUSIVE, + &mem)) { pr_err("Reserved memory: failed to init DMA memory pool at %pa, size %ld MiB\n", &rmem->base, (unsigned long)rmem->size / SZ_1M); return -ENODEV; |