[Patch v9 04/12] net: mana: Set the DMA device max segment size

longli
2022-10-22T00:02:16Z

From: Ajay Sharma <sharmaajay@microsoft.com>

MANA hardware doesn't have any restrictions on the DMA segment size, set it
to the max allowed value.

Signed-off-by: Ajay Sharma <sharmaajay@microsoft.com>
Reviewed-by: Dexuan Cui <decui@microsoft.com>
Signed-off-by: Long Li <longli@microsoft.com>
Acked-by: Haiyang Zhang <haiyangz@microsoft.com>
---
Change log:
v2: Use the max allowed value as the hardware doesn't have any limit

drivers/net/ethernet/microsoft/mana/gdma_main.c | 6 ++++++
1 file changed, 6 insertions(+)

diff --git a/drivers/net/ethernet/microsoft/mana/gdma_main.c b/drivers/net/ethernet/microsoft/mana/gdma_main.c
index 0cfe5f15458e..4f041b27c07d 100644
--- a/drivers/net/ethernet/microsoft/mana/gdma_main.c
+++ b/drivers/net/ethernet/microsoft/mana/gdma_main.c
@@ -1363,6 +1363,12 @@ static int mana_gd_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
if (err)
goto release_region;

+ err = dma_set_max_seg_size(&pdev->dev, UINT_MAX);
+ if (err) {
+ dev_err(&pdev->dev, "Failed to set dma device segment size\n");
+ goto release_region;
+ }
+
err = -ENOMEM;
gc = vzalloc(sizeof(*gc));
if (!gc)
--
2.17.1