On 2021-07-16 12:33 a.m., Christoph Hellwig wrote:
> On Thu, Jul 15, 2021 at 10:45:44AM -0600, Logan Gunthorpe wrote:
>> @@ -194,6 +194,8 @@ static int __dma_map_sg_attrs(struct device *dev, struct
>> scatterlist *sg,
>> else
>> ents = ops->map_sg(dev, sg, nents, dir, attrs);
On 2021-07-16 07:33, Christoph Hellwig wrote:
On Thu, Jul 15, 2021 at 10:45:44AM -0600, Logan Gunthorpe wrote:
@@ -194,6 +194,8 @@ static int __dma_map_sg_attrs(struct device *dev, struct
scatterlist *sg,
else
ents = ops->map_sg(dev, sg, nents, dir, attrs);
+
On Thu, Jul 15, 2021 at 10:45:44AM -0600, Logan Gunthorpe wrote:
> @@ -194,6 +194,8 @@ static int __dma_map_sg_attrs(struct device *dev, struct
> scatterlist *sg,
> else
> ents = ops->map_sg(dev, sg, nents, dir, attrs);
>
> + WARN_ON_ONCE(ents == 0);
Turns this into a
Now that all the .map_sg operations have been converted to returning
proper error codes, drop the code to handle a zero return value,
add a warning if a zero is returned and update the comment for the
map_sg operation.
Signed-off-by: Logan Gunthorpe
---
include/linux/dma-map-ops.h | 8 +++-
