File vfio-Create-shared-routine-for-scanning-.patch of Package qemu.28164

From: Matthew Rosato <mjrosato@linux.ibm.com>
Date: Mon, 26 Oct 2020 11:34:32 -0400
Subject: vfio: Create shared routine for scanning info capabilities
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Git-commit: 3ab7a0b40d4be5ade3b61d4afd1518193b199423
References: bsc#1179719

Rather than duplicating the same loop in multiple locations,
create a static function to do the work.

Signed-off-by: Matthew Rosato <mjrosato@linux.ibm.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Liang Yan <lyan@suse.com>
---
 hw/vfio/common.c | 21 +++++++++++++--------
 1 file changed, 13 insertions(+), 8 deletions(-)

diff --git a/hw/vfio/common.c b/hw/vfio/common.c
index 5ca11488d67635c09088b3f5b789..77d62d2dcdf67516c3e5b42e7def 100644
--- a/hw/vfio/common.c
+++ b/hw/vfio/common.c
@@ -826,17 +826,12 @@ static void vfio_listener_release(VFIOContainer *container)
     }
 }
 
-struct vfio_info_cap_header *
-vfio_get_region_info_cap(struct vfio_region_info *info, uint16_t id)
+static struct vfio_info_cap_header *
+vfio_get_cap(void *ptr, uint32_t cap_offset, uint16_t id)
 {
     struct vfio_info_cap_header *hdr;
-    void *ptr = info;
-
-    if (!(info->flags & VFIO_REGION_INFO_FLAG_CAPS)) {
-        return NULL;
-    }
 
-    for (hdr = ptr + info->cap_offset; hdr != ptr; hdr = ptr + hdr->next) {
+    for (hdr = ptr + cap_offset; hdr != ptr; hdr = ptr + hdr->next) {
         if (hdr->id == id) {
             return hdr;
         }
@@ -845,6 +840,16 @@ vfio_get_region_info_cap(struct vfio_region_info *info, uint16_t id)
     return NULL;
 }
 
+struct vfio_info_cap_header *
+vfio_get_region_info_cap(struct vfio_region_info *info, uint16_t id)
+{
+    if (!(info->flags & VFIO_REGION_INFO_FLAG_CAPS)) {
+        return NULL;
+    }
+
+    return vfio_get_cap((void *)info, info->cap_offset, id);
+}
+
 static int vfio_setup_region_sparse_mmaps(VFIORegion *region,
                                           struct vfio_region_info *info)
 {