[PATCH] hvc_console: MAGIC_SYSRQ should only be on console channel

Guard the MAGIC_SYSRQ ^O to be just on the console channel.  Make the other
channels more transparent.
Signed-off-by: Milton Miller <miltonm@bga.com>
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

drivers/char/hvc_console.c

@@ -584,8 +584,10 @@ static int hvc_poll(struct hvc_struct *hp)
 		}
 		for (i = 0; i < n; ++i) {
 #ifdef CONFIG_MAGIC_SYSRQ
+			if (hp->index == hvc_con_driver.index) {
 				/* Handle the SysRq Hack */
-			if (buf[i] == '\x0f') {	/* ^O -- should support a sequence */
+				/* XXX should support a sequence */
+				if (buf[i] == '\x0f') {	/* ^O */
 					sysrq_pressed = 1;
 					continue;
 				} else if (sysrq_pressed) {
@@ -593,6 +595,7 @@ static int hvc_poll(struct hvc_struct *hp)
 					sysrq_pressed = 0;
 					continue;
 				}
+			}
 #endif /* CONFIG_MAGIC_SYSRQ */
 			tty_insert_flip_char(tty, buf[i], 0);
 		}