xen/grant-table: refactor error cleanup in grow_gnttab_list()
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>
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@ -592,7 +592,7 @@ static int grow_gnttab_list(unsigned int more_frames)
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return 0;
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return 0;
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grow_nomem:
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grow_nomem:
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for ( ; i >= nr_glist_frames; i--)
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while (i-- > nr_glist_frames)
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free_page((unsigned long) gnttab_list[i]);
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free_page((unsigned long) gnttab_list[i]);
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return -ENOMEM;
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return -ENOMEM;
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}
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}
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