patch-2.1.115 linux/drivers/char/stallion.c

• Lines: 38
• Date: Tue Aug 4 22:59:46 1998
• Orig file: v2.1.114/linux/drivers/char/stallion.c
• Orig date: Wed Jun 24 22:54:05 1998

diff -u --recursive --new-file v2.1.114/linux/drivers/char/stallion.c linux/drivers/char/stallion.c
@@ -46,6 +46,8 @@
 #include <linux/ioport.h>
 #include <linux/config.h>
 #include <linux/init.h>
+#include <linux/smp_lock.h>
+
 #include <asm/system.h>
 #include <asm/io.h>
 #include <asm/uaccess.h>
@@ -2001,7 +2003,6 @@
 /*
  *	Service an off-level request for some channel.
  */
-
 static void stl_offintr(void *private)
 {
 	stlport_t		*portp;
@@ -2016,10 +2017,12 @@
 
 	if (portp == (stlport_t *) NULL)
 		return;
+
 	tty = portp->tty;
 	if (tty == (struct tty_struct *) NULL)
 		return;
 
+	lock_kernel();
 	if (test_bit(ASYI_TXLOW, &portp->istate)) {
 		if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) &&
 		    tty->ldisc.write_wakeup)
@@ -2041,6 +2044,7 @@
 			}
 		}
 	}
+	unlock_kernel();
 }
 
 /*****************************************************************************/