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vfio/type1: Initialize resv_msi_base
After enabling CONFIG_IOMMU_DMA on X86 a new warning appears when compiling vfio: drivers/vfio/vfio_iommu_type1.c: In function ‘vfio_iommu_type1_attach_group’: drivers/vfio/vfio_iommu_type1.c:1827:7: warning: ‘resv_msi_base’ may be used uninitialized in this function [-Wmaybe-uninitialized] ret = iommu_get_msi_cookie(domain->domain, resv_msi_base); ~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ The warning is a false positive, because the call to iommu_get_msi_cookie() only happens when vfio_iommu_has_sw_msi() returned true. And that only happens when it also set resv_msi_base. But initialize the variable anyway to get rid of the warning. Signed-off-by: Joerg Roedel <jroedel@suse.de> Reviewed-by: Cornelia Huck <cohuck@redhat.com> Reviewed-by: Eric Auger <eric.auger@redhat.com> Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
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@ -1658,7 +1658,7 @@ static int vfio_iommu_type1_attach_group(void *iommu_data,
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struct bus_type *bus = NULL;
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int ret;
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bool resv_msi, msi_remap;
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phys_addr_t resv_msi_base;
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phys_addr_t resv_msi_base = 0;
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struct iommu_domain_geometry geo;
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LIST_HEAD(iova_copy);
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LIST_HEAD(group_resv_regions);
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