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vfio: add vfio_device_get_irq_info() helper

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Add a helper similar to vfio_device_get_region_info() and use it
everywhere.

Replace a couple of needless allocations with stack variables.

As a side-effect, this fixes a minor error reporting issue in the call
from vfio_msix_early_setup().

Reviewed-by: Cédric Le Goater <clg@redhat.com>
Signed-off-by: John Levon <john.levon@nutanix.com>
Link: https://lore.kernel.org/qemu-devel/20250507152020.1254632-5-john.levon@nutanix.com
Signed-off-by: Cédric Le Goater <clg@redhat.com>
This commit is contained in:
John Levon 2025-05-07 16:20:09 +01:00 • committed by Cédric Le Goater
parent ef73671f0b
commit 5321e623eb
6 changed files with 53 additions and 33 deletions
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3
include/hw/vfio/vfio-device.h
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@ -147,6 +147,9 @@ int vfio_device_get_region_info(VFIODevice *vbasedev, int index,
int vfio_device_get_region_info_type(VFIODevice *vbasedev, uint32_t type,
uint32_t subtype, struct vfio_region_info **info);
bool vfio_device_has_region_cap(VFIODevice *vbasedev, int region, uint16_t cap_type);
int vfio_device_get_irq_info(VFIODevice *vbasedev, int index,
struct vfio_irq_info *info);
#endif
/* Returns 0 on success, or a negative errno. */