[PATCH 16/68] isicom: kill off the BKL
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From: Greg Kroah-Hartman on 10 Aug 2010 18:20 From: Alan Cox <alan(a)linux.intel.com> 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(a)linux.intel.com> Cc: Arnd Bergmann <arnd(a)arndb.de> Signed-off-by: Greg Kroah-Hartman <gregkh(a)suse.de> --- 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 98310e1..c27e9d2 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; -- 1.7.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ |