From: Alan Cox <alan@linux.intel.com>
Date: Thu, 4 Jun 2015 09:13:09 +0000 (+0100)
Subject: dragon-nx32: don't re-enter the scrolling routines while scrolling
X-Git-Url: https://git.ndcode.org/public/gitweb.cgi?a=commitdiff_plain;h=3563e5ff8f7255c5110d7532d19e6632db524023;p=FUZIX.git

dragon-nx32: don't re-enter the scrolling routines while scrolling

If you do it ends badly
---

diff --git a/Kernel/platform-dragon-nx32/devtty.c b/Kernel/platform-dragon-nx32/devtty.c
index 947a23fb..92d0205f 100644
--- a/Kernel/platform-dragon-nx32/devtty.c
+++ b/Kernel/platform-dragon-nx32/devtty.c
@@ -48,8 +48,13 @@ ttyready_t tty_writeready(uint8_t minor)
 
 void tty_putc(uint8_t minor, unsigned char c)
 {
+	irqflags_t irq;
 	if (minor == 1) {
+		/* We need a better way generally to handle keyboard v
+		   VT */
+		irq = di();
 		vtoutput(&c, 1);
+		irqrestore(irq);
 	} else
 		*uart_data = c;	/* Data */
 }