Re: [PATCH] iommu: fix integer truncation

[Joerg Roedel]

On Mon, Jun 17, 2019 at 03:30:54PM +0200, Arnd Bergmann wrote:
> On 32-bit architectures, phys_addr_t may be different from dma_add_t,
> both smaller and bigger. This can lead to an overflow during an assignment
> that clang warns about:
> 
> drivers/iommu/dma-iommu.c:230:10: error: implicit conversion from 'dma_addr_t' (aka 'unsigned long long') to
>       'phys_addr_t' (aka 'unsigned int') changes value from 18446744073709551615 to 4294967295 [-Werror,-Wconstant-conversion]
> 
> Use phys_addr_t here because that is the type that the variable was
> declared as.
> 
> Fixes: aadad097cd46 ("iommu/dma: Reserve IOVA for PCIe inaccessible DMA address")
> Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>

Applied, thanks.