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vfio-ccw: Refactor cleanup of regions 

While we're at it, add a g_free() for the async_cmd_region that
is the last thing currently created.  g_free() knows how to handle
NULL pointers, so this makes it easier to remember what cleanups
need to be performed when new regions are added.

Signed-off-by: Eric Farman <farman@linux.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Message-Id: <20200505125757.98209-3-farman@linux.ibm.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
This commit is contained in:
Eric Farman 2020-05-05 14:57:53 +02:00 committed by Cornelia Huck
parent f76b348ec7
commit 2a3b9cbaa7
1 changed files with 9 additions and 5 deletions
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14
hw/vfio/ccw.c
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@ -363,8 +363,7 @@ static void vfio_ccw_get_region(VFIOCCWDevice *vcdev, Error **errp)
vcdev->io_region_size = info->size;
if (sizeof(*vcdev->io_region) != vcdev->io_region_size) {
error_setg(errp, "vfio: Unexpected size of the I/O region");
g_free(info);
return;
goto out_err;
}
vcdev->io_region_offset = info->offset;
@ -377,15 +376,20 @@ static void vfio_ccw_get_region(VFIOCCWDevice *vcdev, Error **errp)
vcdev->async_cmd_region_size = info->size;
if (sizeof(*vcdev->async_cmd_region) != vcdev->async_cmd_region_size) {
error_setg(errp, "vfio: Unexpected size of the async cmd region");
g_free(vcdev->io_region);
g_free(info);
return;
goto out_err;
}
vcdev->async_cmd_region_offset = info->offset;
vcdev->async_cmd_region = g_malloc0(info->size);
}
g_free(info);
return;
out_err:
g_free(vcdev->async_cmd_region);
g_free(vcdev->io_region);
g_free(info);
return;
}
static void vfio_ccw_put_region(VFIOCCWDevice *vcdev)