diff options
| author | Alan Cox <alan@lxorguk.ukuu.org.uk> | 2008-04-30 09:53:18 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-04-30 17:29:39 +0200 |
| commit | 5a4bc8c1bde7bcb7f02950764e37e9d6bbdb3e32 (patch) | |
| tree | 9c482c6ecd4c7b4b4e0fd2b2c92534e488ef83eb /drivers/char/esp.c | |
| parent | epca: lock_kernel push down (diff) | |
| download | linux-5a4bc8c1bde7bcb7f02950764e37e9d6bbdb3e32.tar.xz linux-5a4bc8c1bde7bcb7f02950764e37e9d6bbdb3e32.zip | |
esp: lock_kernel push down
Push the BKL down into a few internal bits of code in this driver.
Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/char/esp.c')
| -rw-r--r-- | drivers/char/esp.c | 22 |
1 files changed, 16 insertions, 6 deletions
diff --git a/drivers/char/esp.c b/drivers/char/esp.c index f3fe62067344..5ad11a6716c7 100644 --- a/drivers/char/esp.c +++ b/drivers/char/esp.c @@ -1355,6 +1355,7 @@ static int get_serial_info(struct esp_struct * info, { struct serial_struct tmp; + lock_kernel(); memset(&tmp, 0, sizeof(tmp)); tmp.type = PORT_16550A; tmp.line = info->line; @@ -1367,6 +1368,7 @@ static int get_serial_info(struct esp_struct * info, tmp.closing_wait = info->closing_wait; tmp.custom_divisor = info->custom_divisor; tmp.hub6 = 0; + unlock_kernel(); if (copy_to_user(retinfo,&tmp,sizeof(*retinfo))) return -EFAULT; return 0; @@ -1381,6 +1383,7 @@ static int get_esp_config(struct esp_struct * info, return -EFAULT; memset(&tmp, 0, sizeof(tmp)); + lock_kernel(); tmp.rx_timeout = info->config.rx_timeout; tmp.rx_trigger = info->config.rx_trigger; tmp.tx_trigger = info->config.tx_trigger; @@ -1388,6 +1391,7 @@ static int get_esp_config(struct esp_struct * info, tmp.flow_on = info->config.flow_on; tmp.pio_threshold = info->config.pio_threshold; tmp.dma_channel = (info->stat_flags & ESP_STAT_NEVER_DMA ? 0 : dma); + unlock_kernel(); return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0; } @@ -1766,6 +1770,7 @@ static int rs_ioctl(struct tty_struct *tty, struct file * file, struct serial_icounter_struct __user *p_cuser; /* user space */ void __user *argp = (void __user *)arg; unsigned long flags; + int ret; if (serial_paranoia_check(info, tty->name, "rs_ioctl")) return -ENODEV; @@ -1783,7 +1788,10 @@ static int rs_ioctl(struct tty_struct *tty, struct file * file, case TIOCGSERIAL: return get_serial_info(info, argp); case TIOCSSERIAL: - return set_serial_info(info, argp); + lock_kernel(); + ret = set_serial_info(info, argp); + unlock_kernel(); + return ret; case TIOCSERCONFIG: /* do not reconfigure after initial configuration */ return 0; @@ -1855,11 +1863,13 @@ static int rs_ioctl(struct tty_struct *tty, struct file * file, return -EFAULT; return 0; - case TIOCGHAYESESP: - return get_esp_config(info, argp); - case TIOCSHAYESESP: - return set_esp_config(info, argp); - + case TIOCGHAYESESP: + return get_esp_config(info, argp); + case TIOCSHAYESESP: + lock_kernel(); + ret = set_esp_config(info, argp); + unlock_kernel(); + return ret; default: return -ENOIOCTLCMD; } |