diff options
Diffstat (limited to 'kernel/irq/msi.c')
| -rw-r--r-- | kernel/irq/msi.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/kernel/irq/msi.c b/kernel/irq/msi.c index c66787daee57..97ec245803f0 100644 --- a/kernel/irq/msi.c +++ b/kernel/irq/msi.c @@ -103,12 +103,33 @@ int msi_setup_device_data(struct device *dev) return -ENOMEM; INIT_LIST_HEAD(&md->list); + mutex_init(&md->mutex); dev->msi.data = md; devres_add(dev, md); return 0; } /** + * msi_lock_descs - Lock the MSI descriptor storage of a device + * @dev: Device to operate on + */ +void msi_lock_descs(struct device *dev) +{ + mutex_lock(&dev->msi.data->mutex); +} +EXPORT_SYMBOL_GPL(msi_lock_descs); + +/** + * msi_unlock_descs - Unlock the MSI descriptor storage of a device + * @dev: Device to operate on + */ +void msi_unlock_descs(struct device *dev) +{ + mutex_unlock(&dev->msi.data->mutex); +} +EXPORT_SYMBOL_GPL(msi_unlock_descs); + +/** * msi_get_virq - Return Linux interrupt number of a MSI interrupt * @dev: Device to operate on * @index: MSI interrupt index to look for (0-based) |