serial, 8250: remove NR_IRQ usage
Works on my test box with a quick test. Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Alan Cox
Ingo Molnar
parent
5fef06e8c8
commit
25db8ad5c5
|
|
@ -66,7 +66,6 @@
|
|||
#endif
|
||||
|
||||
static struct m68k_serial m68k_soft[NR_PORTS];
|
||||
struct m68k_serial *IRQ_ports[NR_IRQS];
|
||||
|
||||
static unsigned int uart_irqs[NR_PORTS] = UART_IRQ_DEFNS;
|
||||
|
||||
|
|
@ -375,15 +374,11 @@ clear_and_return:
|
|||
*/
|
||||
irqreturn_t rs_interrupt(int irq, void *dev_id)
|
||||
{
|
||||
struct m68k_serial * info;
|
||||
struct m68k_serial *info = dev_id;
|
||||
m68328_uart *uart;
|
||||
unsigned short rx;
|
||||
unsigned short tx;
|
||||
|
||||
info = IRQ_ports[irq];
|
||||
if(!info)
|
||||
return IRQ_NONE;
|
||||
|
||||
uart = &uart_addr[info->line];
|
||||
rx = uart->urx.w;
|
||||
|
||||
|
|
@ -1383,8 +1378,6 @@ rs68328_init(void)
|
|||
info->port, info->irq);
|
||||
printk(" is a builtin MC68328 UART\n");
|
||||
|
||||
IRQ_ports[info->irq] = info; /* waste of space */
|
||||
|
||||
#ifdef CONFIG_M68VZ328
|
||||
if (i > 0 )
|
||||
PJSEL &= 0xCF; /* PSW enable second port output */
|
||||
|
|
@ -1393,7 +1386,7 @@ rs68328_init(void)
|
|||
if (request_irq(uart_irqs[i],
|
||||
rs_interrupt,
|
||||
IRQF_DISABLED,
|
||||
"M68328_UART", NULL))
|
||||
"M68328_UART", info))
|
||||
panic("Unable to attach 68328 serial interrupt\n");
|
||||
}
|
||||
local_irq_restore(flags);
|
||||
|
|
|
|||
|
|
@ -156,11 +156,15 @@ struct uart_8250_port {
|
|||
};
|
||||
|
||||
struct irq_info {
|
||||
spinlock_t lock;
|
||||
struct hlist_node node;
|
||||
int irq;
|
||||
spinlock_t lock; /* Protects list not the hash */
|
||||
struct list_head *head;
|
||||
};
|
||||
|
||||
static struct irq_info irq_lists[NR_IRQS];
|
||||
#define NR_IRQ_HASH 32 /* Can be adjusted later */
|
||||
static struct hlist_head irq_lists[NR_IRQ_HASH];
|
||||
static DEFINE_MUTEX(hash_mutex); /* Used to walk the hash */
|
||||
|
||||
/*
|
||||
* Here we define the default xmit fifo size used for each type of UART.
|
||||
|
|
@ -1545,15 +1549,43 @@ static void serial_do_unlink(struct irq_info *i, struct uart_8250_port *up)
|
|||
BUG_ON(i->head != &up->list);
|
||||
i->head = NULL;
|
||||
}
|
||||
|
||||
spin_unlock_irq(&i->lock);
|
||||
/* List empty so throw away the hash node */
|
||||
if (i->head == NULL) {
|
||||
hlist_del(&i->node);
|
||||
kfree(i);
|
||||
}
|
||||
}
|
||||
|
||||
static int serial_link_irq_chain(struct uart_8250_port *up)
|
||||
{
|
||||
struct irq_info *i = irq_lists + up->port.irq;
|
||||
struct hlist_head *h;
|
||||
struct hlist_node *n;
|
||||
struct irq_info *i;
|
||||
int ret, irq_flags = up->port.flags & UPF_SHARE_IRQ ? IRQF_SHARED : 0;
|
||||
|
||||
mutex_lock(&hash_mutex);
|
||||
|
||||
h = &irq_lists[up->port.irq % NR_IRQ_HASH];
|
||||
|
||||
hlist_for_each(n, h) {
|
||||
i = hlist_entry(n, struct irq_info, node);
|
||||
if (i->irq == up->port.irq)
|
||||
break;
|
||||
}
|
||||
|
||||
if (n == NULL) {
|
||||
i = kzalloc(sizeof(struct irq_info), GFP_KERNEL);
|
||||
if (i == NULL) {
|
||||
mutex_unlock(&hash_mutex);
|
||||
return -ENOMEM;
|
||||
}
|
||||
spin_lock_init(&i->lock);
|
||||
i->irq = up->port.irq;
|
||||
hlist_add_head(&i->node, h);
|
||||
}
|
||||
mutex_unlock(&hash_mutex);
|
||||
|
||||
spin_lock_irq(&i->lock);
|
||||
|
||||
if (i->head) {
|
||||
|
|
@ -1577,14 +1609,28 @@ static int serial_link_irq_chain(struct uart_8250_port *up)
|
|||
|
||||
static void serial_unlink_irq_chain(struct uart_8250_port *up)
|
||||
{
|
||||
struct irq_info *i = irq_lists + up->port.irq;
|
||||
struct irq_info *i;
|
||||
struct hlist_node *n;
|
||||
struct hlist_head *h;
|
||||
|
||||
mutex_lock(&hash_mutex);
|
||||
|
||||
h = &irq_lists[up->port.irq % NR_IRQ_HASH];
|
||||
|
||||
hlist_for_each(n, h) {
|
||||
i = hlist_entry(n, struct irq_info, node);
|
||||
if (i->irq == up->port.irq)
|
||||
break;
|
||||
}
|
||||
|
||||
BUG_ON(n == NULL);
|
||||
BUG_ON(i->head == NULL);
|
||||
|
||||
if (list_empty(i->head))
|
||||
free_irq(up->port.irq, i);
|
||||
|
||||
serial_do_unlink(i, up);
|
||||
mutex_unlock(&hash_mutex);
|
||||
}
|
||||
|
||||
/* Base timer interval for polling */
|
||||
|
|
@ -2960,7 +3006,7 @@ EXPORT_SYMBOL(serial8250_unregister_port);
|
|||
|
||||
static int __init serial8250_init(void)
|
||||
{
|
||||
int ret, i;
|
||||
int ret;
|
||||
|
||||
if (nr_uarts > UART_NR)
|
||||
nr_uarts = UART_NR;
|
||||
|
|
@ -2969,9 +3015,6 @@ static int __init serial8250_init(void)
|
|||
"%d ports, IRQ sharing %sabled\n", nr_uarts,
|
||||
share_irqs ? "en" : "dis");
|
||||
|
||||
for (i = 0; i < NR_IRQS; i++)
|
||||
spin_lock_init(&irq_lists[i].lock);
|
||||
|
||||
#ifdef CONFIG_SPARC
|
||||
ret = sunserial_register_minors(&serial8250_reg, UART_NR);
|
||||
#else
|
||||
|
|
@ -2999,15 +3042,15 @@ static int __init serial8250_init(void)
|
|||
goto out;
|
||||
|
||||
platform_device_del(serial8250_isa_devs);
|
||||
put_dev:
|
||||
put_dev:
|
||||
platform_device_put(serial8250_isa_devs);
|
||||
unreg_uart_drv:
|
||||
unreg_uart_drv:
|
||||
#ifdef CONFIG_SPARC
|
||||
sunserial_unregister_minors(&serial8250_reg, UART_NR);
|
||||
#else
|
||||
uart_unregister_driver(&serial8250_reg);
|
||||
#endif
|
||||
out:
|
||||
out:
|
||||
return ret;
|
||||
}
|
||||
|
||||
|
|
|
|||
Loading…
Reference in a new issue