diff options
Diffstat (limited to 'drivers/tty/hvc/hvc_console.c')
| -rw-r--r-- | drivers/tty/hvc/hvc_console.c | 23 |
1 files changed, 11 insertions, 12 deletions
diff --git a/drivers/tty/hvc/hvc_console.c b/drivers/tty/hvc/hvc_console.c index 7709fcc707f4..fddb63322c67 100644 --- a/drivers/tty/hvc/hvc_console.c +++ b/drivers/tty/hvc/hvc_console.c @@ -73,7 +73,7 @@ static LIST_HEAD(hvc_structs); * Protect the list of hvc_struct instances from inserts and removals during * list traversal. */ -static DEFINE_SPINLOCK(hvc_structs_lock); +static DEFINE_MUTEX(hvc_structs_mutex); /* * This value is used to assign a tty->index value to a hvc_struct based @@ -83,7 +83,7 @@ static DEFINE_SPINLOCK(hvc_structs_lock); static int last_hvc = -1; /* - * Do not call this function with either the hvc_structs_lock or the hvc_struct + * Do not call this function with either the hvc_structs_mutex or the hvc_struct * lock held. If successful, this function increments the kref reference * count against the target hvc_struct so it should be released when finished. */ @@ -92,25 +92,24 @@ static struct hvc_struct *hvc_get_by_index(int index) struct hvc_struct *hp; unsigned long flags; - spin_lock(&hvc_structs_lock); + mutex_lock(&hvc_structs_mutex); list_for_each_entry(hp, &hvc_structs, next) { spin_lock_irqsave(&hp->lock, flags); if (hp->index == index) { tty_port_get(&hp->port); spin_unlock_irqrestore(&hp->lock, flags); - spin_unlock(&hvc_structs_lock); + mutex_unlock(&hvc_structs_mutex); return hp; } spin_unlock_irqrestore(&hp->lock, flags); } hp = NULL; + mutex_unlock(&hvc_structs_mutex); - spin_unlock(&hvc_structs_lock); return hp; } - /* * Initial console vtermnos for console API usage prior to full console * initialization. Any vty adapter outside this range will not have usable @@ -224,13 +223,13 @@ static void hvc_port_destruct(struct tty_port *port) struct hvc_struct *hp = container_of(port, struct hvc_struct, port); unsigned long flags; - spin_lock(&hvc_structs_lock); + mutex_lock(&hvc_structs_mutex); spin_lock_irqsave(&hp->lock, flags); list_del(&(hp->next)); spin_unlock_irqrestore(&hp->lock, flags); - spin_unlock(&hvc_structs_lock); + mutex_unlock(&hvc_structs_mutex); kfree(hp); } @@ -733,11 +732,11 @@ static int khvcd(void *unused) try_to_freeze(); wmb(); if (!cpus_are_in_xmon()) { - spin_lock(&hvc_structs_lock); + mutex_lock(&hvc_structs_mutex); list_for_each_entry(hp, &hvc_structs, next) { poll_mask |= hvc_poll(hp); } - spin_unlock(&hvc_structs_lock); + mutex_unlock(&hvc_structs_mutex); } else poll_mask |= HVC_POLL_READ; if (hvc_kicked) @@ -871,7 +870,7 @@ struct hvc_struct *hvc_alloc(uint32_t vtermno, int data, INIT_WORK(&hp->tty_resize, hvc_set_winsz); spin_lock_init(&hp->lock); - spin_lock(&hvc_structs_lock); + mutex_lock(&hvc_structs_mutex); /* * find index to use: @@ -891,7 +890,7 @@ struct hvc_struct *hvc_alloc(uint32_t vtermno, int data, vtermnos[i] = vtermno; list_add_tail(&(hp->next), &hvc_structs); - spin_unlock(&hvc_structs_lock); + mutex_unlock(&hvc_structs_mutex); /* check if we need to re-register the kernel console */ hvc_check_console(i); |