linux-kernel - [PATCH 1/3] soc: ti: Use list_first_entry_or

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Date:	Sun, 26 Oct 2014 17:37:44 +0800
From:	Axel Lin <axel.lin@...ics.com>
To:	Santosh Shilimkar <ssantosh@...nel.org>
Cc:	Sandeep Nair <sandeep_n@...com>, linux-kernel@...r.kernel.org,
	linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>
Subject: [PATCH 1/3] soc: ti: Use list_first_entry_or_null() at appropriate
 places

Use list_first_entry_or_null() for first_region() and first_queue_range().

list_first_entry() expects the list is not empty, so first_region() and
first_queue_range() never return NULL.
Thus use list_first_entry_or_null() instead.

Signed-off-by: Axel Lin <axel.lin@...ics.com>
---
 drivers/soc/ti/knav_qmss.h | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/soc/ti/knav_qmss.h b/drivers/soc/ti/knav_qmss.h
index bc9dcc8..51da234 100644
--- a/drivers/soc/ti/knav_qmss.h
+++ b/drivers/soc/ti/knav_qmss.h
@@ -348,15 +348,15 @@ struct knav_range_info {
 	list_for_each_entry(region, &kdev->regions, list)
 
 #define first_region(kdev)					\
-	list_first_entry(&kdev->regions, \
-			struct knav_region, list)
+	list_first_entry_or_null(&kdev->regions, \
+				 struct knav_region, list)
 
 #define for_each_queue_range(kdev, range)			\
 	list_for_each_entry(range, &kdev->queue_ranges, list)
 
 #define first_queue_range(kdev)					\
-	list_first_entry(&kdev->queue_ranges, \
-			struct knav_range_info, list)
+	list_first_entry_or_null(&kdev->queue_ranges, \
+				 struct knav_range_info, list)
 
 #define for_each_pool(kdev, pool)				\
 	list_for_each_entry(pool, &kdev->pools, list)
-- 
1.9.1



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