Commit 3d5d30fe authored by Jan Kiszka's avatar Jan Kiszka Committed by David S. Miller

CAPI: Clean up capiminors_lock

Use a plain spin lock for capiminors_lock, drop inconsistent irqsafe
acquisitions (it's only used in process context anyway).
Signed-off-by: default avatarJan Kiszka <jan.kiszka@web.de>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 6576c289
......@@ -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);
}
......
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