On 3/19/2013 10:03 PM, David Miller wrote:
From: Christophe Aeschlimann<aeschlim...@gmail.com>
Date: Tue, 19 Mar 2013 16:59:25 +0100
>Without the mask it is impossible to take the network interface up
>since it returns the following error:
>
>>net eth1: coherent DMA mask is unset
>>ifconfig: SIOCSIFFLAGS: Cannot allocate memory
>
>Tested on an out-of-tree ixp425 based board.
>
>Signed-off-by: Christophe Aeschlimann<c.aeschlim...@acn-group.ch>
...
>@@ -1398,6 +1398,7 @@ static int eth_init_one(struct platform_device *pdev)
> return -ENOMEM;
>
> SET_NETDEV_DEV(dev, &pdev->dev);
>+ dev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
Hmmm, shouldn't this be the default value, set by the bus layer or
similar?
bus layer or any platform code doesn't init this value. The same issue
applies
to CPSW driver also. Previously the same was done in board or device
file. But
this approach is obsolete now, need to think of how it can be resolved in DT
approach
Regards
Mugunthan V N
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