diff options
Diffstat (limited to 'drivers/isdn/capi/capi.c')
| -rw-r--r-- | drivers/isdn/capi/capi.c | 21 |
1 files changed, 9 insertions, 12 deletions
diff --git a/drivers/isdn/capi/capi.c b/drivers/isdn/capi/capi.c index cf5e996..0b264b4 100644 --- a/drivers/isdn/capi/capi.c +++ b/drivers/isdn/capi/capi.c @@ -149,7 +149,7 @@ static LIST_HEAD(capidev_list); #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE -static DEFINE_RWLOCK(capiminors_lock); +static DEFINE_SPINLOCK(capiminors_lock); static struct capiminor **capiminors; static struct tty_driver *capinc_tty_driver; @@ -218,7 +218,6 @@ static struct capiminor *capiminor_alloc(struct capi20_appl *ap, u32 ncci) struct capiminor *mp; struct device *dev; unsigned int minor; - unsigned long flags; mp = kzalloc(sizeof(*mp), GFP_KERNEL); if (!mp) { @@ -242,13 +241,13 @@ static struct capiminor *capiminor_alloc(struct capi20_appl *ap, u32 ncci) mp->port.ops = &capiminor_port_ops; /* Allocate the least unused minor number. */ - write_lock_irqsave(&capiminors_lock, flags); + spin_lock(&capiminors_lock); for (minor = 0; minor < capi_ttyminors; minor++) if (!capiminors[minor]) { capiminors[minor] = mp; break; } - write_unlock_irqrestore(&capiminors_lock, flags); + spin_unlock(&capiminors_lock); if (minor == capi_ttyminors) { printk(KERN_NOTICE "capi: out of minors\n"); @@ -264,9 +263,9 @@ static struct capiminor *capiminor_alloc(struct capi20_appl *ap, u32 ncci) return mp; err_out2: - write_lock_irqsave(&capiminors_lock, flags); + spin_lock(&capiminors_lock); capiminors[minor] = NULL; - write_unlock_irqrestore(&capiminors_lock, flags); + spin_unlock(&capiminors_lock); err_out1: kfree(mp); @@ -288,11 +287,11 @@ static struct capiminor *capiminor_get(unsigned int minor) { struct capiminor *mp; - read_lock(&capiminors_lock); + spin_lock(&capiminors_lock); mp = capiminors[minor]; if (mp) kref_get(&mp->kref); - read_unlock(&capiminors_lock); + spin_unlock(&capiminors_lock); return mp; } @@ -304,13 +303,11 @@ static inline void capiminor_put(struct capiminor *mp) static void capiminor_free(struct capiminor *mp) { - unsigned long flags; - tty_unregister_device(capinc_tty_driver, mp->minor); - write_lock_irqsave(&capiminors_lock, flags); + spin_lock(&capiminors_lock); capiminors[mp->minor] = NULL; - write_unlock_irqrestore(&capiminors_lock, flags); + spin_unlock(&capiminors_lock); capiminor_put(mp); } |