[alsa-devel] [PATCH v3] dbri: Fix compiler warning

[David Miller]

From: Tushar Dave <tushar.n.dave at oracle.com>
Date: Thu, 24 Nov 2016 12:35:16 -0800

> dbri uses 'u32' for dma handle while invoking kernel DMA APIs,
> instead of using dma_addr_t. This hasn't caused any 'incompatible
> pointer type' warning on SPARC because until now dma_addr_t is of
> type u32. However, recent changes in SPARC ATU (iommu) enabled 64bit
> DMA and therefore dma_addr_t became of type u64. This makes
> 'incompatible pointer type' warnings inevitable.
> 
> e.g.
> sound/sparc/dbri.c: In function ‘snd_dbri_create’:
> sound/sparc/dbri.c:2538: warning: passing argument 3 of ‘dma_zalloc_coherent’ from incompatible pointer type
> ./include/linux/dma-mapping.h:608: note: expected ‘dma_addr_t *’ but argument is of type ‘u32 *’
> 
> For the record, dbri(sbus) driver never executes on sun4v. Therefore
> even though 64bit DMA is enabled on SPARC, dbri continues to use
> legacy iommu that guarantees DMA address is always in 32bit range.
> 
> This patch resolves above compiler warning.
> 
> Signed-off-by: Tushar Dave <tushar.n.dave at oracle.com>
> Reviewed-by: thomas tai <thomas.tai at oracle.com>

Applied, thanks.