xen/hvc: only notify if we actually sent something · 403a85ff00 - Gogs

xen/hvc: only notify if we actually sent something

Don't spam dom0/xenconsoled with events unless we've actually added
something to the ring.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>

Jeremy Fitzhardinge 14 years ago

parent

3654581e47

commit

403a85ff00

1 changed files with 2 additions and 1 deletions

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							+ 2
							
							- 1
						
drivers/char/hvc_xen.c
							 
								View File
							
				@@ -74,7 +74,8 @@ static int __write_console(const char *data, int len)
			
				 	wmb();			/* write ring before updating pointer */
			
				 	intf->out_prod = prod;
			
				-	notify_daemon();
			
				+	if (sent)
			
				+		notify_daemon();
			
				 	return sent;
			
				 }