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| author |   Arnd Bergmann <arnd@arndb.de> | 2011-11-29 14:50:17 +0000 |
|---|---|---|
| committer | Arnd Bergmann <arnd@arndb.de> | 2011-11-29 14:50:17 +0000 |
| commit | 98014be39bda8277a5ad130bb274ed6eb18b74df (patch) | |
| tree | 974620a47c9350ff9b3c06ffd2b49470bbda72ab /drivers/usb/class/cdc-acm.c | |
| parent | Merge branch 'fixes-dss' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into fixes (diff) | |
| parent | ARM: ux500: update defconfig (diff) | |
| download | wireguard-linux-98014be39bda8277a5ad130bb274ed6eb18b74df.tar.xz wireguard-linux-98014be39bda8277a5ad130bb274ed6eb18b74df.zip | |
Merge branch 'defconfigs-for-arnd' of git://git.linaro.org/people/triad/linux-stericsson into fixes
Diffstat (limited to 'drivers/usb/class/cdc-acm.c')
| -rw-r--r-- | drivers/usb/class/cdc-acm.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c index 6960715c5063..e8c564a53346 100644 --- a/drivers/usb/class/cdc-acm.c +++ b/drivers/usb/class/cdc-acm.c @@ -539,7 +539,6 @@ static void acm_port_down(struct acm *acm) { int i; - mutex_lock(&open_mutex); if (acm->dev) { usb_autopm_get_interface(acm->control); acm_set_control(acm, acm->ctrlout = 0); @@ -551,14 +550,15 @@ static void acm_port_down(struct acm *acm) acm->control->needs_remote_wakeup = 0; usb_autopm_put_interface(acm->control); } - mutex_unlock(&open_mutex); } static void acm_tty_hangup(struct tty_struct *tty) { struct acm *acm = tty->driver_data; tty_port_hangup(&acm->port); + mutex_lock(&open_mutex); acm_port_down(acm); + mutex_unlock(&open_mutex); } static void acm_tty_close(struct tty_struct *tty, struct file *filp) @@ -569,8 +569,9 @@ static void acm_tty_close(struct tty_struct *tty, struct file *filp) shutdown */ if (!acm) return; + + mutex_lock(&open_mutex); if (tty_port_close_start(&acm->port, tty, filp) == 0) { - mutex_lock(&open_mutex); if (!acm->dev) { tty_port_tty_set(&acm->port, NULL); acm_tty_unregister(acm); @@ -582,6 +583,7 @@ static void acm_tty_close(struct tty_struct *tty, struct file *filp) acm_port_down(acm); tty_port_close_end(&acm->port, tty); tty_port_tty_set(&acm->port, NULL); + mutex_unlock(&open_mutex); } static int acm_tty_write(struct tty_struct *tty, |