[patch] vhost: NULL vs ERR_PTR bug

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There is only one caller for vhost_kvzalloc() and it expects NULL on
allocation failure.  Most people would probably expect that so let's
change ERR_PTR(-ENOMEM) to NULL.

Fixes: 4de7255f7d2b ('vhost: extend memory regions allocation to vmalloc')
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>

diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c
index a9fe859..99d613b 100644
--- a/drivers/vhost/vhost.c
+++ b/drivers/vhost/vhost.c
@@ -686,7 +686,7 @@ static void *vhost_kvzalloc(unsigned long size)
 	if (!n) {
 		n = vzalloc(size);
 		if (!n)
-			return ERR_PTR(-ENOMEM);
+			return NULL;
 	}
 	return n;
 }
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