vmw_balloon: Print errors on reset only once

The VMware balloon might be reset multiple times during execution. Print
errors only once to avoid filling the log unnecessarily.
Signed-off-by: Nadav Amit <namit@vmware.com>
Link: https://lore.kernel.org/r/20220322170052.6351-1-namit@vmware.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/misc/vmw_balloon.c

@@ -1452,10 +1452,10 @@ static void vmballoon_reset(struct vmballoon *b)
 
 	error = vmballoon_vmci_init(b);
 	if (error)
-		pr_err("failed to initialize vmci doorbell\n");
+		pr_err_once("failed to initialize vmci doorbell\n");
 
 	if (vmballoon_send_guest_id(b))
-		pr_err("failed to send guest ID to the host\n");
+		pr_err_once("failed to send guest ID to the host\n");
 
 unlock:
 	up_write(&b->conf_sem);