From: Michael Kelley <mikelley@microsoft.com>
Date: Mon, 6 Feb 2023 12:11:57 -0800
Patch-mainline: v6.2-rc8
Subject: hv_netvsc: Allocate memory in netvsc_dma_map() with GFP_ATOMIC
Git-commit: c6aa9d3b43cd11ac13a8220368a3b0483c6751d4
References: git-fixes

Memory allocations in the network transmit path must use GFP_ATOMIC
so they won't sleep.

Reported-by: Paolo Abeni <pabeni@redhat.com>
Link: https://lore.kernel.org/lkml/8a4d08f94d3e6fe8b6da68440eaa89a088ad84f9.camel@redhat.com/
Fixes: 846da38de0e8 ("net: netvsc: Add Isolation VM support for netvsc driver")
Cc: stable@vger.kernel.org
Signed-off-by: Michael Kelley <mikelley@microsoft.com>
Link: https://lore.kernel.org/r/1675714317-48577-1-git-send-email-mikelley@microsoft.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Acked-by: Olaf Hering <ohering@suse.de>
---
 drivers/net/hyperv/netvsc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/hyperv/netvsc.c b/drivers/net/hyperv/netvsc.c
--- a/drivers/net/hyperv/netvsc.c
+++ b/drivers/net/hyperv/netvsc.c
@@ -1034,7 +1034,7 @@ static int netvsc_dma_map(struct hv_device *hv_dev,
 
 	packet->dma_range = kcalloc(page_count,
 				    sizeof(*packet->dma_range),
-				    GFP_KERNEL);
+				    GFP_ATOMIC);
 	if (!packet->dma_range)
 		return -ENOMEM;