diff options
| -rw-r--r-- | drivers/char/hvc_console.c | 6 | ||||
| -rw-r--r-- | drivers/char/hvc_console.h | 12 | ||||
| -rw-r--r-- | drivers/char/hvc_iucv.c | 4 |
3 files changed, 17 insertions, 5 deletions
diff --git a/drivers/char/hvc_console.c b/drivers/char/hvc_console.c index 25ce15bb1c0..a632f25f144 100644 --- a/drivers/char/hvc_console.c +++ b/drivers/char/hvc_console.c @@ -678,7 +678,7 @@ int hvc_poll(struct hvc_struct *hp) EXPORT_SYMBOL_GPL(hvc_poll); /** - * hvc_resize() - Update terminal window size information. + * __hvc_resize() - Update terminal window size information. * @hp: HVC console pointer * @ws: Terminal window size structure * @@ -687,12 +687,12 @@ EXPORT_SYMBOL_GPL(hvc_poll); * * Locking: Locking free; the function MUST be called holding hp->lock */ -void hvc_resize(struct hvc_struct *hp, struct winsize ws) +void __hvc_resize(struct hvc_struct *hp, struct winsize ws) { hp->ws = ws; schedule_work(&hp->tty_resize); } -EXPORT_SYMBOL_GPL(hvc_resize); +EXPORT_SYMBOL_GPL(__hvc_resize); /* * This kthread is either polling or interrupt driven. This is determined by diff --git a/drivers/char/hvc_console.h b/drivers/char/hvc_console.h index 3c85d78c975..10950ca706d 100644 --- a/drivers/char/hvc_console.h +++ b/drivers/char/hvc_console.h @@ -28,6 +28,7 @@ #define HVC_CONSOLE_H #include <linux/kref.h> #include <linux/tty.h> +#include <linux/spinlock.h> /* * This is the max number of console adapters that can/will be found as @@ -88,7 +89,16 @@ int hvc_poll(struct hvc_struct *hp); void hvc_kick(void); /* Resize hvc tty terminal window */ -extern void hvc_resize(struct hvc_struct *hp, struct winsize ws); +extern void __hvc_resize(struct hvc_struct *hp, struct winsize ws); + +static inline void hvc_resize(struct hvc_struct *hp, struct winsize ws) +{ + unsigned long flags; + + spin_lock_irqsave(&hp->lock, flags); + __hvc_resize(hp, ws); + spin_unlock_irqrestore(&hp->lock, flags); +} /* default notifier for irq based notification */ extern int notifier_add_irq(struct hvc_struct *hp, int data); diff --git a/drivers/char/hvc_iucv.c b/drivers/char/hvc_iucv.c index 0ecac7e532f..b8a5d654d3d 100644 --- a/drivers/char/hvc_iucv.c +++ b/drivers/char/hvc_iucv.c @@ -273,7 +273,9 @@ static int hvc_iucv_write(struct hvc_iucv_private *priv, case MSG_TYPE_WINSIZE: if (rb->mbuf->datalen != sizeof(struct winsize)) break; - hvc_resize(priv->hvc, *((struct winsize *) rb->mbuf->data)); + /* The caller must ensure that the hvc is locked, which + * is the case when called from hvc_iucv_get_chars() */ + __hvc_resize(priv->hvc, *((struct winsize *) rb->mbuf->data)); break; case MSG_TYPE_ERROR: /* ignored ... */ |