linux-kernel - [PATCH] crisv10: prepare for BKL push down

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Date:	Wed, 20 Feb 2008 20:42:19 +0000
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	akpm@...l.org, linux-kernel@...r.kernel.org
Subject: [PATCH] crisv10: prepare for BKL push down

Just the modem bits this time

Signed-off-by: Alan Cox <alan@...hat.com>

diff -u --new-file --recursive --exclude-from /usr/src/exclude linux.vanilla-2.6.25-rc2-mm1/drivers/serial/crisv10.c linux-2.6.25-rc2-mm1/drivers/serial/crisv10.c
--- linux.vanilla-2.6.25-rc2-mm1/drivers/serial/crisv10.c	2008-02-19 11:03:01.000000000 +0000
+++ linux-2.6.25-rc2-mm1/drivers/serial/crisv10.c	2008-02-20 11:52:24.000000000 +0000
@@ -3581,6 +3581,8 @@
 		unsigned int set, unsigned int clear)
 {
 	struct e100_serial *info = (struct e100_serial *)tty->driver_data;
+	
+	lock_kernel();
 
 	if (clear & TIOCM_RTS)
 		e100_rts(info, 0);
@@ -3601,6 +3603,8 @@
 		e100_ri_out(info, 1);
 	if (set & TIOCM_CD)
 		e100_cd_out(info, 1);
+		
+	unlock_kernel();
 	return 0;
 }
 
@@ -3610,6 +3614,7 @@
 	struct e100_serial *info = (struct e100_serial *)tty->driver_data;
 	unsigned int result;
 
+	lock_kernel();
 	result =
 		(!E100_RTS_GET(info) ? TIOCM_RTS : 0)
 		| (!E100_DTR_GET(info) ? TIOCM_DTR : 0)
@@ -3617,6 +3622,8 @@
 		| (!E100_DSR_GET(info) ? TIOCM_DSR : 0)
 		| (!E100_CD_GET(info) ? TIOCM_CAR : 0)
 		| (!E100_CTS_GET(info) ? TIOCM_CTS : 0);
+		
+	unlock_kernel();
 
 #ifdef SERIAL_DEBUG_IO
 	printk(KERN_DEBUG "ser%i: modem state: %i 0x%08X\n",
--
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