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| author | Arnd Bergmann <arnd@arndb.de> | 2017-09-15 17:08:16 +0200 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2017-09-17 08:20:02 -0700 |
| commit | 6d57339890c9a9dfcd4ba4f8931b911b962968e3 (patch) | |
| tree | 11af5efc5550b5a67d6ef618dd49d1cb07a7d9e0 /drivers/base | |
| parent | 2bd6bf03f4c1c59381d62c61d03f6cc3fe71f66e (diff) | |
| download | linux-6d57339890c9a9dfcd4ba4f8931b911b962968e3.tar.gz linux-6d57339890c9a9dfcd4ba4f8931b911b962968e3.tar.bz2 linux-6d57339890c9a9dfcd4ba4f8931b911b962968e3.zip | |
dma-coherent: fix rmem_dma_device_init regression
My recent bug fix introduced another bug, which caused rmem_dma_device_init
to always fail, as rmem->priv is never set to anything.
This restores the previous behavior, calling dma_init_coherent_memory()
whenever ->priv is NULL.
Fixes: d35b0996fef3 ("dma-coherent: fix dma_declare_coherent_memory() logic error")
Reported-by: Roy Pledge <roy.pledge@nxp.com>
Tested-by: Roy Pledge <roy.pledge@nxp.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'drivers/base')
| -rw-r--r-- | drivers/base/dma-coherent.c | 19 |
1 files changed, 9 insertions, 10 deletions
diff --git a/drivers/base/dma-coherent.c b/drivers/base/dma-coherent.c index a39b2166b145..744f64f43454 100644 --- a/drivers/base/dma-coherent.c +++ b/drivers/base/dma-coherent.c @@ -348,16 +348,15 @@ static int rmem_dma_device_init(struct reserved_mem *rmem, struct device *dev) struct dma_coherent_mem *mem = rmem->priv; int ret; - if (!mem) - return -ENODEV; - - ret = dma_init_coherent_memory(rmem->base, rmem->base, rmem->size, - DMA_MEMORY_EXCLUSIVE, &mem); - - if (ret) { - 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 ret; + if (!mem) { + ret = dma_init_coherent_memory(rmem->base, rmem->base, + rmem->size, + DMA_MEMORY_EXCLUSIVE, &mem); + if (ret) { + 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 ret; + } } mem->use_dev_dma_pfn_offset = true; rmem->priv = mem; |