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| author |   Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2013-02-14 10:41:09 +0200 |
|---|---|---|
| committer |   Vinod Koul <vinod.koul@intel.com> | 2013-02-14 15:14:36 +0530 |
| commit | 877e86f28385407f05c5aa4e397d4ccb3233f01a (patch) | |
| tree | 5467a9c9360f49b6ff1d2d0a0f8e8347767904f6 /drivers/dma/dw_dmac.c | |
| parent | dmaengine: ioat - fix spare sparse complain (diff) | |
| download | linux-dev-877e86f28385407f05c5aa4e397d4ccb3233f01a.tar.xz linux-dev-877e86f28385407f05c5aa4e397d4ccb3233f01a.zip | |
dw_dmac: apply default dma_mask if needed
In some cases we got the device without dma_mask configured. We have to apply
the default value to avoid crashes during memory mapping.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Diffstat (limited to '')
| -rw-r--r-- | drivers/dma/dw_dmac.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/dma/dw_dmac.c b/drivers/dma/dw_dmac.c index 6694676c9b82..4c83f18803f1 100644 --- a/drivers/dma/dw_dmac.c +++ b/drivers/dma/dw_dmac.c @@ -1661,6 +1661,12 @@ static int dw_probe(struct platform_device *pdev) if (!regs) return -EBUSY; + /* Apply default dma_mask if needed */ + if (!pdev->dev.dma_mask) { + pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask; + pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32); + } + dw_params = dma_read_byaddr(regs, DW_PARAMS); autocfg = dw_params >> DW_PARAMS_EN & 0x1; |