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iommufd/driver: Fix counter initialization for counted_by annotation

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One of the requirements for counted_by annotations is that the counter
member must be initialized before the first reference to the
flexible-array member.

Move the vevent->data_len = data_len; initialization to before the
first access to flexible array vevent->event_data.

Link: https://patch.msgid.link/r/aRL7ZFFqM5bRTd2D@kspp
Cc: stable@vger.kernel.org
Fixes: e8e1ef9b77 ("iommufd/viommu: Add iommufd_viommu_report_event helper")
Signed-off-by: "Gustavo A. R. Silva" <gustavoars@kernel.org>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Reviewed-by: Nicolin Chen <nicolinc@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
This commit is contained in:
Gustavo A. R. Silva 2025-11-11 18:01:24 +09:00 committed by Jason Gunthorpe
parent 6a23ae0a96
commit ac84ff4533
1 changed files with 1 additions and 1 deletions
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2
drivers/iommu/iommufd/driver.c
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@ -161,8 +161,8 @@ int iommufd_viommu_report_event(struct iommufd_viommu *viommu,
vevent = &veventq->lost_events_header;
goto out_set_header;
}
memcpy(vevent->event_data, event_data, data_len);
vevent->data_len = data_len;
memcpy(vevent->event_data, event_data, data_len);
veventq->num_events++;
out_set_header: