diff options
Diffstat (limited to 'virt/kvm/eventfd.c')
| -rw-r--r-- | virt/kvm/eventfd.c | 26 |
1 files changed, 13 insertions, 13 deletions
diff --git a/virt/kvm/eventfd.c b/virt/kvm/eventfd.c index a9d3fc6..c1f1e3c 100644 --- a/virt/kvm/eventfd.c +++ b/virt/kvm/eventfd.c @@ -2,6 +2,7 @@ * kvm eventfd support - use eventfd objects to signal various KVM events * * Copyright 2009 Novell. All Rights Reserved. + * Copyright 2010 Red Hat, Inc. and/or its affiliates. * * Author: * Gregory Haskins <ghaskins@novell.com> @@ -30,6 +31,7 @@ #include <linux/list.h> #include <linux/eventfd.h> #include <linux/kernel.h> +#include <linux/slab.h> #include "iodev.h" @@ -47,7 +49,6 @@ struct _irqfd { int gsi; struct list_head list; poll_table pt; - wait_queue_head_t *wqh; wait_queue_t wait; struct work_struct inject; struct work_struct shutdown; @@ -159,8 +160,6 @@ irqfd_ptable_queue_proc(struct file *file, wait_queue_head_t *wqh, poll_table *pt) { struct _irqfd *irqfd = container_of(pt, struct _irqfd, pt); - - irqfd->wqh = wqh; add_wait_queue(wqh, &irqfd->wait); } @@ -219,7 +218,6 @@ kvm_irqfd_assign(struct kvm *kvm, int fd, int gsi) events = file->f_op->poll(file, &irqfd->pt); list_add_tail(&irqfd->list, &kvm->irqfds.items); - spin_unlock_irq(&kvm->irqfds.lock); /* * Check if there was an event already pending on the eventfd @@ -228,6 +226,8 @@ kvm_irqfd_assign(struct kvm *kvm, int fd, int gsi) if (events & POLLIN) schedule_work(&irqfd->inject); + spin_unlock_irq(&kvm->irqfds.lock); + /* * do not drop the file until the irqfd is fully initialized, otherwise * we might race against the POLLHUP @@ -463,7 +463,7 @@ static int kvm_assign_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args) { int pio = args->flags & KVM_IOEVENTFD_FLAG_PIO; - struct kvm_io_bus *bus = pio ? &kvm->pio_bus : &kvm->mmio_bus; + enum kvm_bus bus_idx = pio ? KVM_PIO_BUS : KVM_MMIO_BUS; struct _ioeventfd *p; struct eventfd_ctx *eventfd; int ret; @@ -508,7 +508,7 @@ kvm_assign_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args) else p->wildcard = true; - down_write(&kvm->slots_lock); + mutex_lock(&kvm->slots_lock); /* Verify that there isnt a match already */ if (ioeventfd_check_collision(kvm, p)) { @@ -518,18 +518,18 @@ kvm_assign_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args) kvm_iodevice_init(&p->dev, &ioeventfd_ops); - ret = __kvm_io_bus_register_dev(bus, &p->dev); + ret = kvm_io_bus_register_dev(kvm, bus_idx, &p->dev); if (ret < 0) goto unlock_fail; list_add_tail(&p->list, &kvm->ioeventfds); - up_write(&kvm->slots_lock); + mutex_unlock(&kvm->slots_lock); return 0; unlock_fail: - up_write(&kvm->slots_lock); + mutex_unlock(&kvm->slots_lock); fail: kfree(p); @@ -542,7 +542,7 @@ static int kvm_deassign_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args) { int pio = args->flags & KVM_IOEVENTFD_FLAG_PIO; - struct kvm_io_bus *bus = pio ? &kvm->pio_bus : &kvm->mmio_bus; + enum kvm_bus bus_idx = pio ? KVM_PIO_BUS : KVM_MMIO_BUS; struct _ioeventfd *p, *tmp; struct eventfd_ctx *eventfd; int ret = -ENOENT; @@ -551,7 +551,7 @@ kvm_deassign_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args) if (IS_ERR(eventfd)) return PTR_ERR(eventfd); - down_write(&kvm->slots_lock); + mutex_lock(&kvm->slots_lock); list_for_each_entry_safe(p, tmp, &kvm->ioeventfds, list) { bool wildcard = !(args->flags & KVM_IOEVENTFD_FLAG_DATAMATCH); @@ -565,13 +565,13 @@ kvm_deassign_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args) if (!p->wildcard && p->datamatch != args->datamatch) continue; - __kvm_io_bus_unregister_dev(bus, &p->dev); + kvm_io_bus_unregister_dev(kvm, bus_idx, &p->dev); ioeventfd_release(p); ret = 0; break; } - up_write(&kvm->slots_lock); + mutex_unlock(&kvm->slots_lock); eventfd_ctx_put(eventfd); |