[PATCH V2 08/14] Drivers: hv: balloon: Fix info request to show max page count

kys at exchange.microsoft.com kys at exchange.microsoft.com
Tue Nov 1 20:07:28 UTC 2016


From: Alex Ng <alexng at messages.microsoft.com>

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 at microsoft.com>
Signed-off-by: K. Y. Srinivasan <kys at microsoft.com>
---
 drivers/hv/hv_balloon.c |    9 +++++++--
 1 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/hv/hv_balloon.c b/drivers/hv/hv_balloon.c
index 8cac29a..14c3dc4 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);
-- 
1.7.4.1



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