Drivers: hv: balloon: Fix info request to show max page count

Balloon driver was only printing the size of the info blob and not the
actual content. This fixes it so that the info blob (max page count as
configured in Hyper-V) is printed out.

Signed-off-by: Alex Ng <alexng@microsoft.com>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 7 insertions, 2 deletions

diff --git a/drivers/hv/hv_balloon.c b/drivers/hv/hv_balloon.c
index 8cac29a24f21..14c3dc4bd23c 100644
--- a/drivers/hv/hv_balloon.c
+++ b/drivers/hv/hv_balloon.c
@@ -1034,8 +1034,13 @@ static void process_info(struct hv_dynmem_device *dm, struct dm_info_msg *msg)
 
         switch (info_hdr->type) {
         case INFO_TYPE_MAX_PAGE_CNT:
-                pr_info("Received INFO_TYPE_MAX_PAGE_CNT\n");
-                pr_info("Data Size is %d\n", info_hdr->data_size);
+                if (info_hdr->data_size == sizeof(__u64)) {
+                        __u64 *max_page_count = (__u64 *)&info_hdr[1];
+
+                        pr_info("INFO_TYPE_MAX_PAGE_CNT = %llu\n",
+                                *max_page_count);
+                }
+
                 break;
         default:
                 pr_info("Received Unknown type: %d\n", info_hdr->type);