[PATCH 3/4] [MTD] physmap: Fix suspend/resume/shutdown bugs.

[Uwe Kleine-König]

From: Robert Jarzmik <rjarzmik at free.fr>

Don't call suspend/resume functions if they have not been
defined.

Signed-off-by: Robert Jarzmik <rjarzmik at free.fr>
Acked-By: Joern Engel <joern at logfs.org>
Signed-off-by: Uwe Kleine-König <Uwe.Kleine-Koenig at digi.com>
---
 drivers/mtd/maps/physmap.c |   11 +++++++----
 1 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/drivers/mtd/maps/physmap.c b/drivers/mtd/maps/physmap.c
index 183255f..73c770b 100644
--- a/drivers/mtd/maps/physmap.c
+++ b/drivers/mtd/maps/physmap.c
@@ -203,7 +203,8 @@ static int physmap_flash_suspend(struct platform_device *dev, pm_message_t state
 	int i;
 
 	for (i = 0; i < MAX_RESOURCES && info->mtd[i]; i++)
-		ret |= info->mtd[i]->suspend(info->mtd[i]);
+		if (info->mtd[i]->suspend)
+			ret |= info->mtd[i]->suspend(info->mtd[i]);
 
 	return ret;
 }
@@ -214,7 +215,8 @@ static int physmap_flash_resume(struct platform_device *dev)
 	int i;
 
 	for (i = 0; i < MAX_RESOURCES && info->mtd[i]; i++)
-		info->mtd[i]->resume(info->mtd[i]);
+		if (info->mtd[i]->resume)
+			info->mtd[i]->resume(info->mtd[i]);
 
 	return 0;
 }
@@ -225,8 +227,9 @@ static void physmap_flash_shutdown(struct platform_device *dev)
 	int i;
 
 	for (i = 0; i < MAX_RESOURCES && info->mtd[i]; i++)
-		if (info->mtd[i]->suspend(info->mtd[i]) == 0)
-			info->mtd[i]->resume(info->mtd[i]);
+		if (info->mtd[i]->suspend && info->mtd[i]->resume)
+			if (info->mtd[i]->suspend(info->mtd[i]) == 0)
+				info->mtd[i]->resume(info->mtd[i]);
 }
 #else
 #define physmap_flash_suspend NULL
-- 
1.5.6.3