diff options
Diffstat (limited to 'arch')
-rw-r--r-- | arch/um/drivers/line.c | 18 | ||||
-rw-r--r-- | arch/um/drivers/mconsole_kern.c | 2 | ||||
-rw-r--r-- | arch/um/drivers/net_kern.c | 2 | ||||
-rw-r--r-- | arch/um/drivers/port_kern.c | 4 | ||||
-rw-r--r-- | arch/um/drivers/random.c | 2 | ||||
-rw-r--r-- | arch/um/drivers/ubd_kern.c | 2 | ||||
-rw-r--r-- | arch/um/drivers/vector_kern.c | 4 | ||||
-rw-r--r-- | arch/um/drivers/virtio_uml.c | 4 | ||||
-rw-r--r-- | arch/um/drivers/xterm_kern.c | 2 | ||||
-rw-r--r-- | arch/um/include/asm/irq.h | 6 | ||||
-rw-r--r-- | arch/um/include/shared/irq_kern.h | 12 | ||||
-rw-r--r-- | arch/um/kernel/irq.c | 37 | ||||
-rw-r--r-- | arch/um/kernel/sigio.c | 2 |
13 files changed, 65 insertions, 32 deletions
diff --git a/arch/um/drivers/line.c b/arch/um/drivers/line.c index 77ce63a57070..1c70a31e7c5b 100644 --- a/arch/um/drivers/line.c +++ b/arch/um/drivers/line.c @@ -262,19 +262,25 @@ static irqreturn_t line_write_interrupt(int irq, void *data) int line_setup_irq(int fd, int input, int output, struct line *line, void *data) { const struct line_driver *driver = line->driver; - int err = 0; + int err; - if (input) + if (input) { err = um_request_irq(driver->read_irq, fd, IRQ_READ, line_interrupt, IRQF_SHARED, driver->read_irq_name, data); - if (err) - return err; - if (output) + if (err < 0) + return err; + } + + if (output) { err = um_request_irq(driver->write_irq, fd, IRQ_WRITE, line_write_interrupt, IRQF_SHARED, driver->write_irq_name, data); - return err; + if (err < 0) + return err; + } + + return 0; } static int line_activate(struct tty_port *port, struct tty_struct *tty) diff --git a/arch/um/drivers/mconsole_kern.c b/arch/um/drivers/mconsole_kern.c index a2e680f7d39f..6d00af25ec6b 100644 --- a/arch/um/drivers/mconsole_kern.c +++ b/arch/um/drivers/mconsole_kern.c @@ -738,7 +738,7 @@ static int __init mconsole_init(void) err = um_request_irq(MCONSOLE_IRQ, sock, IRQ_READ, mconsole_interrupt, IRQF_SHARED, "mconsole", (void *)sock); - if (err) { + if (err < 0) { printk(KERN_ERR "Failed to get IRQ for management console\n"); goto out; } diff --git a/arch/um/drivers/net_kern.c b/arch/um/drivers/net_kern.c index 1802cf4ef5a5..2fc0b038ff8a 100644 --- a/arch/um/drivers/net_kern.c +++ b/arch/um/drivers/net_kern.c @@ -160,7 +160,7 @@ static int uml_net_open(struct net_device *dev) err = um_request_irq(dev->irq, lp->fd, IRQ_READ, uml_net_interrupt, IRQF_SHARED, dev->name, dev); - if (err != 0) { + if (err < 0) { printk(KERN_ERR "uml_net_open: failed to get irq(%d)\n", err); err = -ENETUNREACH; goto out_close; diff --git a/arch/um/drivers/port_kern.c b/arch/um/drivers/port_kern.c index a47ca5376d9d..efa8b7304090 100644 --- a/arch/um/drivers/port_kern.c +++ b/arch/um/drivers/port_kern.c @@ -100,7 +100,7 @@ static int port_accept(struct port_list *port) .port = port }); if (um_request_irq(TELNETD_IRQ, socket[0], IRQ_READ, pipe_interrupt, - IRQF_SHARED, "telnetd", conn)) { + IRQF_SHARED, "telnetd", conn) < 0) { printk(KERN_ERR "port_accept : failed to get IRQ for " "telnetd\n"); goto out_free; @@ -182,7 +182,7 @@ void *port_data(int port_num) } if (um_request_irq(ACCEPT_IRQ, fd, IRQ_READ, port_interrupt, - IRQF_SHARED, "port", port)) { + IRQF_SHARED, "port", port) < 0) { printk(KERN_ERR "Failed to get IRQ for port %d\n", port_num); goto out_close; } diff --git a/arch/um/drivers/random.c b/arch/um/drivers/random.c index e4b9b2ce9abf..bd3059adc2fb 100644 --- a/arch/um/drivers/random.c +++ b/arch/um/drivers/random.c @@ -76,7 +76,7 @@ static int __init rng_init (void) random_fd = err; err = um_request_irq(RANDOM_IRQ, random_fd, IRQ_READ, random_interrupt, 0, "random", NULL); - if (err) + if (err < 0) goto err_out_cleanup_hw; sigio_broken(random_fd, 1); diff --git a/arch/um/drivers/ubd_kern.c b/arch/um/drivers/ubd_kern.c index 3b48640f89d5..7e07b321e847 100644 --- a/arch/um/drivers/ubd_kern.c +++ b/arch/um/drivers/ubd_kern.c @@ -1253,7 +1253,7 @@ static int __init ubd_driver_init(void){ } err = um_request_irq(UBD_IRQ, thread_fd, IRQ_READ, ubd_intr, 0, "ubd", ubd_devs); - if(err != 0) + if(err < 0) printk(KERN_ERR "um_request_irq failed - errno = %d\n", -err); return 0; } diff --git a/arch/um/drivers/vector_kern.c b/arch/um/drivers/vector_kern.c index aa6ba9d61e9b..47a02e60898d 100644 --- a/arch/um/drivers/vector_kern.c +++ b/arch/um/drivers/vector_kern.c @@ -1271,7 +1271,7 @@ static int vector_net_open(struct net_device *dev) irq_rr + VECTOR_BASE_IRQ, vp->fds->rx_fd, IRQ_READ, vector_rx_interrupt, IRQF_SHARED, dev->name, dev); - if (err != 0) { + if (err < 0) { netdev_err(dev, "vector_open: failed to get rx irq(%d)\n", err); err = -ENETUNREACH; goto out_close; @@ -1286,7 +1286,7 @@ static int vector_net_open(struct net_device *dev) irq_rr + VECTOR_BASE_IRQ, vp->fds->tx_fd, IRQ_WRITE, vector_tx_interrupt, IRQF_SHARED, dev->name, dev); - if (err != 0) { + if (err < 0) { netdev_err(dev, "vector_open: failed to get tx irq(%d)\n", err); err = -ENETUNREACH; diff --git a/arch/um/drivers/virtio_uml.c b/arch/um/drivers/virtio_uml.c index a6c4bb6c2c01..f76b8da28d20 100644 --- a/arch/um/drivers/virtio_uml.c +++ b/arch/um/drivers/virtio_uml.c @@ -412,7 +412,7 @@ static int vhost_user_init_slave_req(struct virtio_uml_device *vu_dev) rc = um_request_irq(VIRTIO_IRQ, vu_dev->req_fd, IRQ_READ, vu_req_interrupt, IRQF_SHARED, vu_dev->pdev->name, vu_dev); - if (rc) + if (rc < 0) goto err_close; rc = vhost_user_send_no_payload_fd(vu_dev, VHOST_USER_SET_SLAVE_REQ_FD, @@ -854,7 +854,7 @@ static int vu_setup_vq_call_fd(struct virtio_uml_device *vu_dev, info->call_fd = call_fds[0]; rc = um_request_irq(VIRTIO_IRQ, info->call_fd, IRQ_READ, vu_interrupt, IRQF_SHARED, info->name, vq); - if (rc) + if (rc < 0) goto close_both; rc = vhost_user_set_vring_call(vu_dev, vq->index, call_fds[1]); diff --git a/arch/um/drivers/xterm_kern.c b/arch/um/drivers/xterm_kern.c index d64ef6d0d463..50f11b7b4774 100644 --- a/arch/um/drivers/xterm_kern.c +++ b/arch/um/drivers/xterm_kern.c @@ -51,7 +51,7 @@ int xterm_fd(int socket, int *pid_out) err = um_request_irq(XTERM_IRQ, socket, IRQ_READ, xterm_interrupt, IRQF_SHARED, "xterm", data); - if (err) { + if (err < 0) { printk(KERN_ERR "xterm_fd : failed to get IRQ for xterm, " "err = %d\n", err); ret = err; diff --git a/arch/um/include/asm/irq.h b/arch/um/include/asm/irq.h index 42c6205e2dc4..b6fa6301c75b 100644 --- a/arch/um/include/asm/irq.h +++ b/arch/um/include/asm/irq.h @@ -24,14 +24,14 @@ #define VECTOR_BASE_IRQ (VIRTIO_IRQ + 1) #define VECTOR_IRQ_SPACE 8 -#define LAST_IRQ (VECTOR_IRQ_SPACE + VECTOR_BASE_IRQ - 1) +#define UM_FIRST_DYN_IRQ (VECTOR_IRQ_SPACE + VECTOR_BASE_IRQ) #else -#define LAST_IRQ VIRTIO_IRQ +#define UM_FIRST_DYN_IRQ (VIRTIO_IRQ + 1) #endif -#define NR_IRQS (LAST_IRQ + 1) +#define NR_IRQS 64 #endif diff --git a/arch/um/include/shared/irq_kern.h b/arch/um/include/shared/irq_kern.h index 7cd1a10c6244..7c04a0fd3a27 100644 --- a/arch/um/include/shared/irq_kern.h +++ b/arch/um/include/shared/irq_kern.h @@ -9,10 +9,10 @@ #include <linux/interrupt.h> #include <asm/ptrace.h> -extern int um_request_irq(unsigned int irq, int fd, int type, - irq_handler_t handler, - unsigned long irqflags, const char * devname, - void *dev_id); -void um_free_irq(unsigned int irq, void *dev); -#endif +#define UM_IRQ_ALLOC -1 +int um_request_irq(int irq, int fd, int type, irq_handler_t handler, + unsigned long irqflags, const char * devname, + void *dev_id); +void um_free_irq(int irq, void *dev_id); +#endif diff --git a/arch/um/kernel/irq.c b/arch/um/kernel/irq.c index 3577118bb4a5..b94c72f56617 100644 --- a/arch/um/kernel/irq.c +++ b/arch/um/kernel/irq.c @@ -19,6 +19,7 @@ #include <kern_util.h> #include <os.h> #include <irq_user.h> +#include <irq_kern.h> extern void free_irqs(void); @@ -38,6 +39,7 @@ struct irq_entry { static struct irq_entry *active_fds; static DEFINE_SPINLOCK(irq_lock); +static DECLARE_BITMAP(irqs_allocated, NR_IRQS); static void irq_io_loop(struct irq_fd *irq, struct uml_pt_regs *regs) { @@ -421,27 +423,52 @@ unsigned int do_IRQ(int irq, struct uml_pt_regs *regs) return 1; } -void um_free_irq(unsigned int irq, void *dev) +void um_free_irq(int irq, void *dev) { + if (WARN(irq < 0 || irq > NR_IRQS, "freeing invalid irq %d", irq)) + return; + free_irq_by_irq_and_dev(irq, dev); free_irq(irq, dev); + clear_bit(irq, irqs_allocated); } EXPORT_SYMBOL(um_free_irq); -int um_request_irq(unsigned int irq, int fd, int type, +int um_request_irq(int irq, int fd, int type, irq_handler_t handler, unsigned long irqflags, const char * devname, void *dev_id) { int err; + if (irq == UM_IRQ_ALLOC) { + int i; + + for (i = UM_FIRST_DYN_IRQ; i < NR_IRQS; i++) { + if (!test_and_set_bit(i, irqs_allocated)) { + irq = i; + break; + } + } + } + + if (irq < 0) + return -ENOSPC; + if (fd != -1) { err = activate_fd(irq, fd, type, dev_id); if (err) - return err; + goto error; } - return request_irq(irq, handler, irqflags, devname, dev_id); + err = request_irq(irq, handler, irqflags, devname, dev_id); + if (err < 0) + goto error; + + return irq; +error: + clear_bit(irq, irqs_allocated); + return err; } EXPORT_SYMBOL(um_request_irq); @@ -480,7 +507,7 @@ void __init init_IRQ(void) irq_set_chip_and_handler(TIMER_IRQ, &SIGVTALRM_irq_type, handle_edge_irq); - for (i = 1; i <= LAST_IRQ; i++) + for (i = 1; i < NR_IRQS; i++) irq_set_chip_and_handler(i, &normal_irq_type, handle_edge_irq); /* Initialize EPOLL Loop */ os_setup_epoll(); diff --git a/arch/um/kernel/sigio.c b/arch/um/kernel/sigio.c index d1cffc2a7f21..5085a50c3b8c 100644 --- a/arch/um/kernel/sigio.c +++ b/arch/um/kernel/sigio.c @@ -25,7 +25,7 @@ int write_sigio_irq(int fd) err = um_request_irq(SIGIO_WRITE_IRQ, fd, IRQ_READ, sigio_interrupt, 0, "write sigio", NULL); - if (err) { + if (err < 0) { printk(KERN_ERR "write_sigio_irq : um_request_irq failed, " "err = %d\n", err); return -1; |