crisv10: prepare for BKL push down

Just the modem bits this time

Signed-off-by: Alan Cox <alan@redhat.com>
Cc: Mikael Starvik <mikael.starvik@axis.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 7 insertions, 0 deletions

diff --git a/drivers/serial/crisv10.c b/drivers/serial/crisv10.c
index 383c4e660cd5..88e7c1d5b919 100644
--- a/drivers/serial/crisv10.c
+++ b/drivers/serial/crisv10.c
@@ -3582,6 +3582,8 @@ rs_tiocmset(struct tty_struct *tty, struct file *file,
 {
         struct e100_serial *info = (struct e100_serial *)tty->driver_data;
 
+        lock_kernel();
+
         if (clear & TIOCM_RTS)
                 e100_rts(info, 0);
         if (clear & TIOCM_DTR)
@@ -3601,6 +3603,8 @@ rs_tiocmset(struct tty_struct *tty, struct file *file,
                 e100_ri_out(info, 1);
         if (set & TIOCM_CD)
                 e100_cd_out(info, 1);
+
+        unlock_kernel();
         return 0;
 }
 
@@ -3610,6 +3614,7 @@ rs_tiocmget(struct tty_struct *tty, struct file *file)
         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)
@@ -3618,6 +3623,8 @@ rs_tiocmget(struct tty_struct *tty, struct file *file)
                 | (!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",
                 info->line, result, result);