1 files changed, 24 insertions, 5 deletions

diff --git a/drivers/scsi/scsi_sysfs.c b/drivers/scsi/scsi_sysfs.c
index 67bb20ed45d2..fbd7f9ed1251 100644
--- a/drivers/scsi/scsi_sysfs.c
+++ b/drivers/scsi/scsi_sysfs.c
@@ -21,6 +21,8 @@
 #include "scsi_priv.h"
 #include "scsi_logging.h"
 
+static struct device_type scsi_dev_type;
+
 static const struct {
         enum scsi_device_state  value;
         char                    *name;
@@ -335,7 +337,12 @@ static struct class sdev_class = {
 /* all probing is done in the individual ->probe routines */
 static int scsi_bus_match(struct device *dev, struct device_driver *gendrv)
 {
-        struct scsi_device *sdp = to_scsi_device(dev);
+        struct scsi_device *sdp;
+
+        if (dev->type != &scsi_dev_type)
+                return 0;
+
+        sdp = to_scsi_device(dev);
         if (sdp->no_uld_attach)
                 return 0;
         return (sdp->inq_periph_qual == SCSI_INQ_PQ_CON)? 1: 0;
@@ -351,10 +358,16 @@ static int scsi_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
 
 static int scsi_bus_suspend(struct device * dev, pm_message_t state)
 {
-        struct device_driver *drv = dev->driver;
-        struct scsi_device *sdev = to_scsi_device(dev);
+        struct device_driver *drv;
+        struct scsi_device *sdev;
         int err;
 
+        if (dev->type != &scsi_dev_type)
+                return 0;
+
+        drv = dev->driver;
+        sdev = to_scsi_device(dev);
+
         err = scsi_device_quiesce(sdev);
         if (err)
                 return err;
@@ -370,10 +383,16 @@ static int scsi_bus_suspend(struct device * dev, pm_message_t state)
 
 static int scsi_bus_resume(struct device * dev)
 {
-        struct device_driver *drv = dev->driver;
-        struct scsi_device *sdev = to_scsi_device(dev);
+        struct device_driver *drv;
+        struct scsi_device *sdev;
         int err = 0;
 
+        if (dev->type != &scsi_dev_type)
+                return 0;
+
+        drv = dev->driver;
+        sdev = to_scsi_device(dev);
+
         if (drv && drv->resume)
                 err = drv->resume(dev);