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

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

Signed-off-by: Robert Jarzmik <rjarzmik@free.fr>
Acked-By: Jörn Engel <joern@logfs.org>
Signed-off-by: Uwe Kleine-König <Uwe.Kleine-Koenig@digi.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

1 files changed, 7 insertions, 4 deletions

diff --git a/drivers/mtd/maps/physmap.c b/drivers/mtd/maps/physmap.c
index 1f6b9066b63e..7c8cdf49deb6 100644
--- a/drivers/mtd/maps/physmap.c
+++ b/drivers/mtd/maps/physmap.c
@@ -201,7 +201,8 @@ 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;
 }
@@ -212,7 +213,8 @@ 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;
 }
@@ -223,8 +225,9 @@ 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