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Commit c5e2254f authored by K. Y. Srinivasan's avatar K. Y. Srinivasan Committed by Greg Kroah-Hartman
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Drivers: hv: balloon: Do not post pressure status if interrupted 



When we are posting pressure status, we may get interrupted and handle
the un-balloon operation. In this case just don't post the status as we
know the pressure status is stale.

Signed-off-by: default avatarK. Y. Srinivasan <kys@microsoft.com>
Cc: Stable <stable@vger.kernel.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent ed07ec93

drivers/hv/hv_balloon.c

+8 −0
Original line number Original line Diff line number Diff line
@@ -975,6 +975,14 @@ static void post_status(struct hv_dynmem_device *dm) 
				dm->num_pages_ballooned +

				dm->num_pages_ballooned +

				compute_balloon_floor();

				compute_balloon_floor();





	/*

	 * If our transaction ID is no longer current, just don't

	 * send the status. This can happen if we were interrupted

	 * after we picked our transaction ID.

	 */

	if (status.hdr.trans_id != atomic_read(&trans_id))

		return;



	vmbus_sendpacket(dm->dev->channel, &status,

	vmbus_sendpacket(dm->dev->channel, &status,

				sizeof(struct dm_status),

				sizeof(struct dm_status),

				(unsigned long)NULL,

				(unsigned long)NULL,