netdev - [PATCH net] gve: Fix GFP flags when allocing pages

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Date:   Mon, 12 Sep 2022 17:09:01 -0700
From:   Jeroen de Borst <jeroendb@...gle.com>
To:     netdev@...r.kernel.org
Cc:     davem@...emloft.net, kuba@...nel.org,
        Shailend Chand <shailend@...gle.com>,
        Jeroen de Borst <jeroendb@...gle.com>
Subject: [PATCH net] gve: Fix GFP flags when allocing pages

From: Shailend Chand <shailend@...gle.com>

Use GFP_ATOMIC when allocating pages out of the hotpath,
continue to use GFP_KERNEL when allocating pages during setup.

GFP_KERNEL will allow blocking which allows it to succeed
more often in a low memory enviornment but in the hotpath we do
not want to allow the allocation to block.

Fixes: 9b8dd5e5ea48b ("gve: DQO: Add RX path")
Signed-off-by: Shailend Chand <shailend@...gle.com>
Signed-off-by: Jeroen de Borst <jeroendb@...gle.com>
---
 drivers/net/ethernet/google/gve/gve_rx_dqo.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/google/gve/gve_rx_dqo.c b/drivers/net/ethernet/google/gve/gve_rx_dqo.c
index 8c939628e2d8..2e6461b0ea8b 100644
--- a/drivers/net/ethernet/google/gve/gve_rx_dqo.c
+++ b/drivers/net/ethernet/google/gve/gve_rx_dqo.c
@@ -157,7 +157,7 @@ static int gve_alloc_page_dqo(struct gve_priv *priv,
 	int err;
 
 	err = gve_alloc_page(priv, &priv->pdev->dev, &buf_state->page_info.page,
-			     &buf_state->addr, DMA_FROM_DEVICE, GFP_KERNEL);
+			     &buf_state->addr, DMA_FROM_DEVICE, GFP_ATOMIC);
 	if (err)
 		return err;
 
-- 
2.37.2.789.g6183377224-goog