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xen/grant-table: refactor error cleanup in grow_gnttab_list()

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The cleanup loop in grow_gnttab_list() is safe from the underflow of
the unsigned 'i' since nr_glist_frames is >= 1, but refactor it
anyway.

Signed-off-by: Chen Gang <gang.chen.5i5j@gmail.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
This commit is contained in:
Chen Gang 2014-08-26 23:38:44 +08:00 committed by Stefano Stabellini
parent 4fbb67e3c8
commit 46e3626adb
1 changed files with 1 additions and 1 deletions
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2
drivers/xen/grant-table.c
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@ -592,7 +592,7 @@ static int grow_gnttab_list(unsigned int more_frames)
return 0;
grow_nomem:
for ( ; i >= nr_glist_frames; i--)
while (i-- > nr_glist_frames)
free_page((unsigned long) gnttab_list[i]);
return -ENOMEM;
}