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+renesas@xxxxxxxxxxxx>
Reported-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
---
drivers/mmc/host/renesas_sdhi_internal_dmac.c | 25 ++++++++++++++++++-
1 file changed, 24 insertions(+), 1 deletion(-)
diff --git a/drivers/mmc/host/renesas_sdhi_internal_dmac.c b/drivers/mmc/host/renesas_sdhi_internal_dmac.c
index 225af5389599108a..13a286e2a247042d 100644
--- a/drivers/mmc/host/renesas_sdhi_internal_dmac.c
+++ b/drivers/mmc/host/renesas_sdhi_internal_dmac.c
@@ -292,15 +292,38 @@ 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 = kzalloc(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);
}
+static int renesas_sdhi_internal_dmac_remove(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ int ret;
+
+ ret = renesas_sdhi_remove(pdev);
+
+ kfree(dev->dma_parms);
+ dev->dma_parms = NULL;
+
+ return ret;
+}
+
static const struct dev_pm_ops renesas_sdhi_internal_dmac_dev_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
pm_runtime_force_resume)
@@ -316,7 +339,7 @@ static struct platform_driver renesas_internal_dmac_sdhi_driver = {
.of_match_table = renesas_sdhi_internal_dmac_of_match,
},
.probe = renesas_sdhi_internal_dmac_probe,
- .remove = renesas_sdhi_remove,
+ .remove = renesas_sdhi_internal_dmac_remove,
};
module_platform_driver(renesas_internal_dmac_sdhi_driver);
--
2.18.0
