Messages in this thread Patch in this message | ![/](/images/icornerl.gif) | | From | Alan Cox <> | Subject | [PATCH 08/14] isicom: kill off the BKL | Date | Thu, 01 Apr 2010 17:05:50 +0100 |
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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 | 12 +++++------- 1 files changed, 5 insertions(+), 7 deletions(-)
diff --git a/drivers/char/isicom.c b/drivers/char/isicom.c index 0fa2e4a..989dd4b 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> @@ -1113,8 +1112,7 @@ 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)); @@ -1123,7 +1121,7 @@ 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) | @@ -1140,7 +1138,7 @@ 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; } @@ -1149,7 +1147,7 @@ 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; @@ -1159,7 +1157,7 @@ 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;
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