Re: [PATCH v2 13/21] s390/pci: don't set failed sg dma_address to DMA_MAPPING_ERROR

[Niklas Schnelle <schnelle@xxxxxxxxxxxxx>]

On Fri, 2021-07-23 at 11:50 -0600, Logan Gunthorpe wrote:
> Setting the ->dma_address to DMA_MAPPING_ERROR is not part of
> the ->map_sg calling convention, so remove it.
> 
> Link: https://lore.kernel.org/linux-mips/20210716063241.GC13345@xxxxxx/
> Suggested-by: Christoph Hellwig <hch@xxxxxx>
> Signed-off-by: Logan Gunthorpe <logang@xxxxxxxxxxxx>
> Cc: Niklas Schnelle <schnelle@xxxxxxxxxxxxx>
> Cc: Gerald Schaefer <gerald.schaefer@xxxxxxxxxxxxx>
> Cc: Heiko Carstens <hca@xxxxxxxxxxxxx>
> Cc: Vasily Gorbik <gor@xxxxxxxxxxxxx>
> Cc: Christian Borntraeger <borntraeger@xxxxxxxxxx>
> ---
>  arch/s390/pci/pci_dma.c | 1 -
>  1 file changed, 1 deletion(-)
> 
> diff --git a/arch/s390/pci/pci_dma.c b/arch/s390/pci/pci_dma.c
> index c78b02012764..be48e5b5bfcf 100644
> --- a/arch/s390/pci/pci_dma.c
> +++ b/arch/s390/pci/pci_dma.c
> @@ -492,7 +492,6 @@ static int s390_dma_map_sg(struct device *dev, struct scatterlist *sg,
>  	for (i = 1; i < nr_elements; i++) {
>  		s = sg_next(s);
>  
> -		s->dma_address = DMA_MAPPING_ERROR;
>  		s->dma_length = 0;
>  
>  		if (s->offset || (size & ~PAGE_MASK) ||

Acked-by: Niklas Schnelle <schnelle@xxxxxxxxxxxxx>

Thanks!