[SCSI] megaraid_sas: fix 64 bit sense pointer truncation

The current sense pointer is cast to a u32 pointer, which can truncate
on 64 bits.  Fix by using unsigned long instead.

Signed-off-by Bo Yang<bo.yang@lsi.com>
Cc: stable@kernel.org
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

diff --git a/drivers/scsi/megaraid/megaraid_sas.c b/drivers/scsi/megaraid/megaraid_sas.c
index b0d6991..2305672 100644 (file)
--- a/drivers/scsi/megaraid/megaraid_sas.c
+++ b/drivers/scsi/megaraid/megaraid_sas.c
@@ -3515,7 +3515,7 @@ megasas_mgmt_fw_ioctl(struct megasas_instance *instance,
        int error = 0, i;
        void *sense = NULL;
        dma_addr_t sense_handle;
-       u32 *sense_ptr;
+       unsigned long *sense_ptr;
 
        memset(kbuff_arr, 0, sizeof(kbuff_arr));
 
@@ -3593,7 +3593,7 @@ megasas_mgmt_fw_ioctl(struct megasas_instance *instance,
                }
 
                sense_ptr =
-                   (u32 *) ((unsigned long)cmd->frame + ioc->sense_off);
+               (unsigned long *) ((unsigned long)cmd->frame + ioc->sense_off);
                *sense_ptr = sense_handle;
        }
 
@@ -3624,8 +3624,8 @@ megasas_mgmt_fw_ioctl(struct megasas_instance *instance,
                 * sense_ptr points to the location that has the user
                 * sense buffer address
                 */
-               sense_ptr = (u32 *) ((unsigned long)ioc->frame.raw +
-                                    ioc->sense_off);
+               sense_ptr = (unsigned long *) ((unsigned long)ioc->frame.raw +
+                               ioc->sense_off);
 
                if (copy_to_user((void __user *)((unsigned long)(*sense_ptr)),
                                 sense, ioc->sense_len)) {