From: Ajay Sharma <sharmaajay@microsoft.com>
Date: Thu, 3 Nov 2022 19:16:22 +0000 (-0700)
Subject: [PATCH 06/44] net: mana: Set the DMA device max segment size
X-Git-Tag: archive/raspbian/6.1.135-1+rpi1^2~39
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=f7589b7da156f128b66e0239e8ffd8511d6fc3f3;p=linux.git

[PATCH 06/44] net: mana: Set the DMA device max segment size

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>
Link: https://lore.kernel.org/r/1667502990-2559-5-git-send-email-longli@linuxonhyperv.com
Acked-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
(cherry picked from commit 6fe254160bd033a1e62dbad9b734183b31144678)
Signed-off-by: Bastian Blank <waldi@debian.org>

Gbp-Pq: Topic features/all/ethernet-microsoft
Gbp-Pq: Name 0006-net-mana-Set-the-DMA-device-max-segment-size.patch
---

diff --git a/drivers/net/ethernet/microsoft/mana/gdma_main.c b/drivers/net/ethernet/microsoft/mana/gdma_main.c
index a00bd88443d..bc00a7d0723 100644
--- a/drivers/net/ethernet/microsoft/mana/gdma_main.c
+++ b/drivers/net/ethernet/microsoft/mana/gdma_main.c
@@ -1403,6 +1403,12 @@ 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)