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orangefs: Do not unref if there is no bufmap.

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Signed-off-by: Mike Marshall <hubcap@omnibond.com>
Signed-off-by: Martin Brandenburg <martin@omnibond.com>
This commit is contained in:
Martin Brandenburg 2015-12-15 14:54:27 -05:00 committed by Mike Marshall
parent 765a75b34a
commit b09d10df5a
1 changed files with 19 additions and 8 deletions
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27
fs/orangefs/orangefs-bufmap.c
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@ -82,21 +82,32 @@ static void orangefs_bufmap_unref(struct orangefs_bufmap *bufmap)
}
}
/*
* XXX: Can the size and shift change while the caller gives up the
* XXX: lock between calling this and doing something useful?
*/
int orangefs_bufmap_size_query(void)
{
struct orangefs_bufmap *bufmap = orangefs_bufmap_ref();
int size = bufmap ? bufmap->desc_size : 0;
orangefs_bufmap_unref(bufmap);
struct orangefs_bufmap *bufmap;
int size = 0;
bufmap = orangefs_bufmap_ref();
if (bufmap) {
size = bufmap->desc_size;
orangefs_bufmap_unref(bufmap);
}
return size;
}
int orangefs_bufmap_shift_query(void)
{
struct orangefs_bufmap *bufmap = orangefs_bufmap_ref();
int shift = bufmap ? bufmap->desc_shift : 0;
orangefs_bufmap_unref(bufmap);
struct orangefs_bufmap *bufmap;
int shift = 0;
bufmap = orangefs_bufmap_ref();
if (bufmap) {
shift = bufmap->desc_shift;
orangefs_bufmap_unref(bufmap);
}
return shift;
}