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SubjectRe: iwl3945 prints warning
On Mon, Jan 28, 2013 at 03:09:03PM +0100, Zdenek Kabelac wrote:
> I'm getting tthis warning printed with current 3.8-rc kernel
> My hw is Lenovo T61.
>
>
> [ 5.920284] iwl3945 0000:03:00.0: loaded firmware version 15.32.2.9
> [ 5.976605] systemd[1]: Started NFS file locking service..
> [ 5.982624] NFSD: starting 90-second grace period (net ffffffff81aa08c0)
> [ 5.987930] ------------[ cut here ]------------
> [ 5.988026] WARNING: at lib/dma-debug.c:933 check_unmap+0x4ae/0x9a0()
> [ 5.988111] Hardware name: 6464CTO
> [ 5.988194] iwl3945 0000:03:00.0: DMA-API: device driver failed
> to check map error[device address=0x00000000bb7a7800] [size=4096
> bytes] [mapped as page]

We have to check dma_map_*() error. Fixing all of calls to dma_map* in
iwlegacy is not so simple. For now, you can just ignore this WARNING or
disable CONFIG_DMA_API_DEBUG.

Stanislaw


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