firmware: arm_ffa: Skip the first/partition ID when parsing vCPU list

The FF-A notification id list received in response to the call
FFA_NOTIFICATION_INFO_GET is encoded as: partition ID followed by 0 or
more vCPU ID. The count includes all of them.

Fix the issue by skipping the first/partition ID so that only the list
of vCPU IDs are processed correctly for a given partition ID. The first/
partition ID is read before the start of the loop.

Fixes: 3522be4 ("firmware: arm_ffa: Implement the NOTIFICATION_INFO_GET interface")
Reported-by: Andrei Homescu <[email protected]>
Message-Id: <[email protected]>
Signed-off-by: Sudeep Holla <[email protected]>

Author: sudeep-holla

drivers/firmware/arm_ffa/driver.c

@@ -1012,7 +1012,7 @@ static void ffa_notification_info_get(void)
 			}
 
 			/* Per vCPU Notification */
-			for (idx = 0; idx < ids_count[list]; idx++) {
+			for (idx = 1; idx < ids_count[list]; idx++) {
 				if (ids_processed >= max_ids - 1)
 					break;