Fix warning when running with CONFIG_DMA_API_DEBUG_SG=y by allocating a
device_dma_parameters structure and filling in the max segment size. The
size used is the result of a discussion with Renesas hardware engineers
and unfortunately not found in the datasheet.
renesas_sdhi_internal_dmac ee140000.sd: DMA-API: mapping sg segment
longer than device claims to support [len=126976] [max=65536A]
Signed-off-by: Niklas Söderlund <niklas.soderlund+rene...@ragnatech.se>
Reported-by: Geert Uytterhoeven <geert+rene...@glider.be>
---
* Changes since v1
- Use devm_kzalloc() instead of a custom remove function to clean up.
---
drivers/mmc/host/renesas_sdhi_internal_dmac.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/drivers/mmc/host/renesas_sdhi_internal_dmac.c
b/drivers/mmc/host/renesas_sdhi_internal_dmac.c
index c9dab9ce1ed55174..715e0c5dc30e4ebf 100644
--- a/drivers/mmc/host/renesas_sdhi_internal_dmac.c
+++ b/drivers/mmc/host/renesas_sdhi_internal_dmac.c
@@ -308,12 +308,23 @@ static const struct soc_device_attribute
gen3_soc_whitelist[] = {
static int renesas_sdhi_internal_dmac_probe(struct platform_device *pdev)
{
const struct soc_device_attribute *soc =
soc_device_match(gen3_soc_whitelist);
+ struct device *dev = &pdev->dev;
if (!soc)
return -ENODEV;
global_flags |= (unsigned long)soc->data;
+ if (!dev->dma_parms) {
+ dev->dma_parms = devm_kzalloc(dev, sizeof(*dev->dma_parms),
+ GFP_KERNEL);
+ if (!dev->dma_parms)
+ return -ENOMEM;
+ }
+
+ if (dma_set_max_seg_size(dev, 0xffffffff))
+ dev_warn(dev, "Unable to set seg size\n");
+
return renesas_sdhi_probe(pdev, &renesas_sdhi_internal_dmac_dma_ops);
}
--
2.18.0
