From: Alan Cox <alan@linux.intel.com>
To: linux-serial@vger.kernel.org, linux-kernel@vger.kernel.org,
arnd@arndb.de
Subject: [PATCH 04/20] isicom: kill off the BKL
Date: Wed, 05 May 2010 11:02:02 +0100 [thread overview]
Message-ID: <20100505100202.3595.51706.stgit@localhost.localdomain> (raw)
In-Reply-To: <20100505100144.3595.65633.stgit@localhost.localdomain>
As with the others we can use the port mutex to get the needed locking
properties and fix the race with open.
Signed-off-by: Alan Cox <alan@linux.intel.com>
---
drivers/char/isicom.c | 13 +++++--------
1 files changed, 5 insertions(+), 8 deletions(-)
diff --git a/drivers/char/isicom.c b/drivers/char/isicom.c
index c1ab303..bfeaefc 100644
--- a/drivers/char/isicom.c
+++ b/drivers/char/isicom.c
@@ -124,7 +124,6 @@
#include <linux/fs.h>
#include <linux/sched.h>
#include <linux/serial.h>
-#include <linux/smp_lock.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
#include <linux/timer.h>
@@ -872,7 +871,6 @@ static struct tty_port *isicom_find_port(struct tty_struct *tty)
static int isicom_open(struct tty_struct *tty, struct file *filp)
{
struct isi_port *port;
- struct isi_board *card;
struct tty_port *tport;
tport = isicom_find_port(tty);
@@ -1118,8 +1116,7 @@ static int isicom_set_serial_info(struct tty_struct *tty,
if (copy_from_user(&newinfo, info, sizeof(newinfo)))
return -EFAULT;
- lock_kernel();
-
+ mutex_lock(&port->port.mutex);
reconfig_port = ((port->port.flags & ASYNC_SPD_MASK) !=
(newinfo.flags & ASYNC_SPD_MASK));
@@ -1128,7 +1125,7 @@ static int isicom_set_serial_info(struct tty_struct *tty,
(newinfo.closing_wait != port->port.closing_wait) ||
((newinfo.flags & ~ASYNC_USR_MASK) !=
(port->port.flags & ~ASYNC_USR_MASK))) {
- unlock_kernel();
+ mutex_unlock(&port->port.mutex);
return -EPERM;
}
port->port.flags = ((port->port.flags & ~ASYNC_USR_MASK) |
@@ -1145,7 +1142,7 @@ static int isicom_set_serial_info(struct tty_struct *tty,
isicom_config_port(tty);
spin_unlock_irqrestore(&port->card->card_lock, flags);
}
- unlock_kernel();
+ mutex_unlock(&port->port.mutex);
return 0;
}
@@ -1154,7 +1151,7 @@ static int isicom_get_serial_info(struct isi_port *port,
{
struct serial_struct out_info;
- lock_kernel();
+ mutex_lock(&port->port.mutex);
memset(&out_info, 0, sizeof(out_info));
/* out_info.type = ? */
out_info.line = port - isi_ports;
@@ -1164,7 +1161,7 @@ static int isicom_get_serial_info(struct isi_port *port,
/* out_info.baud_base = ? */
out_info.close_delay = port->port.close_delay;
out_info.closing_wait = port->port.closing_wait;
- unlock_kernel();
+ mutex_unlock(&port->port.mutex);
if (copy_to_user(info, &out_info, sizeof(out_info)))
return -EFAULT;
return 0;
next prev parent reply other threads:[~2010-05-05 10:02 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-05-05 10:01 [PATCH 01/20] stallion: prune lock_kernel calls Alan Cox
2010-05-05 10:01 ` [PATCH 02/20] istallion: use bit ops for the board flags Alan Cox
2010-05-05 10:01 ` [PATCH 03/20] riscom8: kill use of lock_kernel Alan Cox
2010-05-05 10:02 ` Alan Cox [this message]
2010-05-05 10:02 ` [PATCH 05/20] rocket: kill BKL Alan Cox
2010-05-05 10:02 ` [PATCH 06/20] synclink: kill the big kernel lock Alan Cox
2010-05-05 10:02 ` [PATCH 07/20] cyclades: Kill off BKL usage Alan Cox
2010-05-05 10:02 ` [PATCH 08/20] epca: Kill the big kernel lock Alan Cox
2010-05-05 10:02 ` [PATCH 09/20] specialix; Kill the BKL Alan Cox
2010-05-05 10:02 ` [PATCH 10/20] synclink: reworking locking a bit Alan Cox
2010-05-05 10:02 ` [PATCH 11/20] tty: serial - fix various misuses/mishandlings of port->tty Alan Cox
2010-05-05 10:02 ` [PATCH 12/20] tty: serial - fix tty back references in termios Alan Cox
2010-05-05 10:02 ` [PATCH 13/20] tty: serial - fix tty referencing in set_ldisc Alan Cox
2010-05-05 10:02 ` [PATCH 14/20] vc: Locking clean up Alan Cox
2010-05-05 10:03 ` [PATCH 15/20] tty: Make vt's have a tty_port Alan Cox
2010-05-05 10:03 ` [PATCH 16/20] tty: Move the vt_tty field from the vc_data into the standard tty_port Alan Cox
2010-05-05 10:03 ` [PATCH 17/20] serial: Change the wait for carrier locking Alan Cox
2010-05-05 10:03 ` [PATCH 18/20] serial: add port helpers Alan Cox
2010-05-05 10:03 ` [PATCH 19/20] serial: trim locking on the helpers Alan Cox
2010-05-05 10:03 ` [PATCH 20/20] serial: Use block_til_ready helper Alan Cox
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