[PATCH] ata: fix sparse warning in libata.h

[Harvey Harrison <harvey.harrison@gmail.com>]

Avoids lots of these, also is more readable.
include/linux/libata.h:1210:13: warning: potentially expensive pointer subtraction

Change the subtraction to addition on the other side of the comparison.

Thanks to Christer Weinigel for the suggestion.

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
---
 include/linux/libata.h |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/include/linux/libata.h b/include/linux/libata.h
index bc5a8d0..a6243bb 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -1207,7 +1207,7 @@ static inline struct ata_link *ata_port_next_link(struct ata_link *link)
 		return ap->pmp_link;
 	}
 
-	if (++link - ap->pmp_link < ap->nr_pmp_links)
+	if (++link < ap->nr_pmp_links + ap->pmp_link)
 		return link;
 	return NULL;
 }
-- 
1.5.4.1.1278.gc75be