diff options
Diffstat (limited to 'drivers/char')
| -rw-r--r-- | drivers/char/cyclades.c | 20 |
1 files changed, 9 insertions, 11 deletions
diff --git a/drivers/char/cyclades.c b/drivers/char/cyclades.c index 9824b4162904..51acfe39a438 100644 --- a/drivers/char/cyclades.c +++ b/drivers/char/cyclades.c @@ -65,7 +65,6 @@ #include <linux/tty.h> #include <linux/tty_flip.h> #include <linux/serial.h> -#include <linux/smp_lock.h> #include <linux/major.h> #include <linux/string.h> #include <linux/fcntl.h> @@ -1655,7 +1654,6 @@ static void cy_wait_until_sent(struct tty_struct *tty, int timeout) return; /* Just in case.... */ orig_jiffies = jiffies; - lock_kernel(); /* * Set the check interval to be 1/5 of the estimated time to * send a single character, and make it at least 1. The check @@ -1702,7 +1700,6 @@ static void cy_wait_until_sent(struct tty_struct *tty, int timeout) } /* Run one more char cycle */ msleep_interruptible(jiffies_to_msecs(char_time * 5)); - unlock_kernel(); #ifdef CY_DEBUG_WAIT_UNTIL_SENT printk(KERN_DEBUG "Clean (jiff=%lu)...done\n", jiffies); #endif @@ -1959,7 +1956,6 @@ static int cy_chars_in_buffer(struct tty_struct *tty) int char_count; __u32 tx_put, tx_get, tx_bufsize; - lock_kernel(); tx_get = readl(&buf_ctrl->tx_get); tx_put = readl(&buf_ctrl->tx_put); tx_bufsize = readl(&buf_ctrl->tx_bufsize); @@ -1971,7 +1967,6 @@ static int cy_chars_in_buffer(struct tty_struct *tty) printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n", info->line, info->xmit_cnt + char_count); #endif - unlock_kernel(); return info->xmit_cnt + char_count; } #endif /* Z_EXT_CHARS_IN_BUFFER */ @@ -2359,17 +2354,22 @@ cy_set_serial_info(struct cyclades_port *info, struct tty_struct *tty, struct serial_struct __user *new_info) { struct serial_struct new_serial; + int ret; if (copy_from_user(&new_serial, new_info, sizeof(new_serial))) return -EFAULT; + mutex_lock(&info->port.mutex); if (!capable(CAP_SYS_ADMIN)) { if (new_serial.close_delay != info->port.close_delay || new_serial.baud_base != info->baud || (new_serial.flags & ASYNC_FLAGS & ~ASYNC_USR_MASK) != (info->port.flags & ASYNC_FLAGS & ~ASYNC_USR_MASK)) + { + mutex_unlock(&info->port.mutex); return -EPERM; + } info->port.flags = (info->port.flags & ~ASYNC_USR_MASK) | (new_serial.flags & ASYNC_USR_MASK); info->baud = new_serial.baud_base; @@ -2392,10 +2392,12 @@ cy_set_serial_info(struct cyclades_port *info, struct tty_struct *tty, check_and_exit: if (info->port.flags & ASYNC_INITIALIZED) { cy_set_line_char(info, tty); - return 0; + ret = 0; } else { - return cy_startup(info, tty); + ret = cy_startup(info, tty); } + mutex_unlock(&info->port.mutex); + return ret; } /* set_serial_info */ /* @@ -2438,7 +2440,6 @@ static int cy_tiocmget(struct tty_struct *tty, struct file *file) card = info->card; - lock_kernel(); if (!cy_is_Z(card)) { unsigned long flags; int channel = info->line - card->first_line; @@ -2478,7 +2479,6 @@ static int cy_tiocmget(struct tty_struct *tty, struct file *file) ((lstatus & C_RS_CTS) ? TIOCM_CTS : 0); } end: - unlock_kernel(); return result; } /* cy_tiomget */ @@ -2696,7 +2696,6 @@ cy_ioctl(struct tty_struct *tty, struct file *file, printk(KERN_DEBUG "cyc:cy_ioctl ttyC%d, cmd = %x arg = %lx\n", info->line, cmd, arg); #endif - lock_kernel(); switch (cmd) { case CYGETMON: @@ -2817,7 +2816,6 @@ cy_ioctl(struct tty_struct *tty, struct file *file, default: ret_val = -ENOIOCTLCMD; } - unlock_kernel(); #ifdef CY_DEBUG_OTHER printk(KERN_DEBUG "cyc:cy_ioctl done\n"); |