[PATCH net 1/1] hv_netvsc: Allocate memory in netvsc_dma_map() with GFP_ATOMIC

[Michael Kelley]

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

Reported-by: Paolo Abeni <pabeni@xxxxxxxxxx>
Link: https://lore.kernel.org/lkml/8a4d08f94d3e6fe8b6da68440eaa89a088ad84f9.camel@xxxxxxxxxx/
Fixes: 846da38de0e8 ("net: netvsc: Add Isolation VM support for netvsc driver")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Michael Kelley <mikelley@xxxxxxxxxxxxx>
---
 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