net: change type of virtio_chan->p9_max_pages

This member of struct virtio_chan is calculated from nr_free_buffer_pages
so change its type to unsigned long in case of overflow.

Signed-off-by: Zhang Yanfei <zhangyanfei@cn.fujitsu.com>
Cc: David Miller <davem@davemloft.net>
Cc: Eric Van Hensbergen <ericvh@gmail.com>
Cc: Ron Minnich <rminnich@sandia.gov>
Cc: Latchesar Ionkov <lucho@ionkov.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/net/9p/trans_virtio.c b/net/9p/trans_virtio.c
index fd05c81cb348fe04a0701aad70d672a7f17f238e..de2e950a0a7a8724a06618b45334e0c544278f70 100644 (file)
--- a/net/9p/trans_virtio.c
+++ b/net/9p/trans_virtio.c
@@ -87,7 +87,7 @@ struct virtio_chan {
        /* This is global limit. Since we don't have a global structure,
         * will be placing it in each channel.
         */
-       int p9_max_pages;
+       unsigned long p9_max_pages;
        /* Scatterlist: can be too big for stack. */
        struct scatterlist sg[VIRTQUEUE_NUM];