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Message-Id: <1675714317-48577-1-git-send-email-mikelley@microsoft.com>
Date: Mon, 6 Feb 2023 12:11:57 -0800
From: Michael Kelley <mikelley@...rosoft.com>
To: kys@...rosoft.com, haiyangz@...rosoft.com, wei.liu@...nel.org,
decui@...rosoft.com, davem@...emloft.net, edumazet@...gle.com,
kuba@...nel.org, pabeni@...hat.com, netdev@...r.kernel.org,
linux-hyperv@...r.kernel.org, linux-kernel@...r.kernel.org
Cc: mikelley@...rosoft.com, stable@...r.kernel.org
Subject: [PATCH net 1/1] hv_netvsc: Allocate memory in netvsc_dma_map() with GFP_ATOMIC
Memory allocations in the network transmit path must use GFP_ATOMIC
so they won't sleep.
Reported-by: Paolo Abeni <pabeni@...hat.com>
Link: https://lore.kernel.org/lkml/8a4d08f94d3e6fe8b6da68440eaa89a088ad84f9.camel@redhat.com/
Fixes: 846da38de0e8 ("net: netvsc: Add Isolation VM support for netvsc driver")
Cc: stable@...r.kernel.org
Signed-off-by: Michael Kelley <mikelley@...rosoft.com>
---
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
index e02d1e3..79f4e13 100644
--- 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;
--
1.8.3.1
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