[SCSI] mptfusion: sanity check for vdevice pointer is added

Added sanity checks before accessing vdevice and added vdevice->deleted
setting for mptfc.

Signed-off-by: Kashyap Desai <kashyap.desai@lsi.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

1 files changed, 7 insertions, 0 deletions

diff --git a/drivers/message/fusion/mptctl.c b/drivers/message/fusion/mptctl.c
index e7fab5de16e7..f06b29193b4e 100644
--- a/drivers/message/fusion/mptctl.c
+++ b/drivers/message/fusion/mptctl.c
@@ -1329,6 +1329,8 @@ mptctl_getiocinfo (unsigned long arg, unsigned int data_size)
         if (ioc->sh) {
                 shost_for_each_device(sdev, ioc->sh) {
                         vdevice = sdev->hostdata;
+                        if (vdevice == NULL || vdevice->vtarget == NULL)
+                                continue;
                         if (vdevice->vtarget->tflags &
                             MPT_TARGET_FLAGS_RAID_COMPONENT)
                                 continue;
@@ -1450,6 +1452,8 @@ mptctl_gettargetinfo (unsigned long arg)
                         if (!maxWordsLeft)
                                 continue;
                         vdevice = sdev->hostdata;
+                        if (vdevice == NULL || vdevice->vtarget == NULL)
+                                continue;
                         if (vdevice->vtarget->tflags &
                             MPT_TARGET_FLAGS_RAID_COMPONENT)
                                 continue;
@@ -1978,6 +1982,9 @@ mptctl_do_mpt_command (struct mpt_ioctl_command karg, void __user *mfPtr)
                                 struct scsi_target *starget = scsi_target(sdev);
                                 VirtTarget *vtarget = starget->hostdata;
 
+                                if (vtarget == NULL)
+                                        continue;
+
                                 if ((pScsiReq->TargetID == vtarget->id) &&
                                     (pScsiReq->Bus == vtarget->channel) &&
                                     (vtarget->tflags & MPT_TARGET_FLAGS_Q_YES))